All questions

5th Class Power Engineering Practice Exam

Browse all practice questions for the 5th Class Power Engineering Practice Exam. Search by topic, open any question and review its full explanation, then test yourself in the practice quiz.

Start practice test Flash cards

All questions

These questions are part of the practice quiz. Start practicing

What is one of the main purposes of conducting an external boiler inspection?
A modular cast-iron heating boiler is composed of what?
What is the common term for long parallel rollers in bearings?
An essential part of a forced draft cooling tower operation is
What does a luminaire refer to in lighting terminology?
The benefits of using low-voltage control circuits include which of the following?
What typically results from poor maintenance of boiler components?
What is the basic unit for measuring length?
The Canadian Registration Number (CRN) is required for:
Which device is used to confirm that the fan motor is operational?
Which statement regarding stationary mechanical seals is false?
When transposing the equation E = RI to solve for I, what is the resulting formula?
Refrigerants that are flammable and highly toxic belong to which group?
What is the leakage of outdoor air into a building through cracks and openings called?
Under what condition may hot oil coke in the heater tubes?
Which of the following uses a valve to control the discharge of water?
How many Imperial gallons are equivalent to 19 USCS gallons?
If an electric motor is rated at 15 hp, what is its rating in kW?
Which of the following is NOT a reason for using lubricants?
Which ASME section is primarily concerned with new boiler construction?
Vertical firetube boilers are advantageous when which of the following is limited?
Which type of piping cannot be used for potable water lines?
What is one of the main components of an electric ignition system?
To avoid cavitation in the pump, the pressure at the highest point of the system should be at least equivalent to a head of water of:
What is a purpose of the CSA B52 code?
What is the unit of pressure in the SI system?
Which of the following best describes the context of the term 'heating surface' in boilers?
What does the term 'total head' refer to in a pumping system?
In a hot water heating boiler, what variable does the burner control sense?
Which type of pressure control in a heating boiler regulates maximum safe pressure?
One of the methods employed to prevent backflow and control the cross connections is the:
What issue may occur if a float-controlled valve is leaking?
In the SI system, how is draft for heating boilers typically measured?
What piping size characteristic relates to gravity hot water heating systems?
Where should the float rod be adjusted to properly operate the inlet valve?
Which of the following conditions denotes high humidity from a health perspective?
Which factor listed affects the leakage tendency of a refrigerant?
What design feature is important for ensuring minimal water drift in a cooling tower?
Which device is used to control the action of valves in a heating system?
Which of the following defines a force?
Which type of humidification is not commonly used in residential settings?
How long is the trial period before a lockout switch is energized if the pilot fails to ignite?
According to typical Occupational Health and Safety Regulations, which condition is NOT required for confined space entry?
What is a common characteristic of a "D" type boiler?
The action of bringing dye penetrant, entrapped in a crack, to the surface is accomplished by which process?
What is the normal temperature limit for water in a hot water heating system with an open expansion tank?
What type of valve is a backwater valve classified as?
What is refrigeration defined as?
Which of the following features characterizes a complete lighting unit?
The fire point is described as the temperature at what condition?
What is FALSE regarding thrust bearings?
What is one cause of insufficient steam supply to a steam heating unit?
During the charging process, where is the refrigerant stored in liquid form?
In a compression refrigeration system, what happens to the vapor during compression?
What is a common method used to ensure the safety of power engineering operations?
The pounding or banging of pipes and shuddering of fixtures caused by a shock wave resulting from a sudden stop of water flow in a pipe is:
Special diverter fittings were required in _________ hot water heating systems to ensure an adequate flow of water through each convector.
In the metric system, what does the prefix 'kilo-' represent?
In a compression refrigeration system, where is the strainer typically placed?
What type of valve is commonly used to prevent backflow in plumbing systems?
How often should fans and blowers be cleaned and lubricated to ensure they operate properly?
Which component does the capillary tube connect in a refrigeration system?
Which element is critical in maintaining the efficiency of a refrigeration system?
What does WHMIS stand for?
Which principle does the low water fuel cut-off operate on?
Which of the following actions is critical when a boiler is under evaluation for safety?
What is the total surface area in square metres of a closed cylinder that is 5 m high and 5 m in diameter?
What is the minimum oxygen level that should not be exceeded in confined spaces?
Which action is taken to prevent excessive stresses in boiler metal from uneven expansion?
What feature of an electric boiler may require special considerations for noise levels?
What is a common environmental concern related to many refrigerants?
What is thermal transmittance or U-factor (U) used to measure?
What is a common safety issue associated with high-pressure boilers?
How many sections are typically found on a Material Safety Data Sheet?
What is a major component of a typical hot oil system?
What is the service temperature limit of refractory fiber insulation?
In a refrigeration system with a high-pressure float, where is the refrigerant stored?
What can cause premature bearing failure due to lubricant quality?
Where should the high limit control of a steam heating boiler operate?
What is the primary document that must be approved by the jurisdictional parliament?
What is the role of flue gas baffles in bent tube boilers?
Are boiler checks necessary in an automatic microturbine combined heating system?
Which component is present in natural gas and occupies 10%-20% of its composition?
What is one of the main parts of a refrigerant reciprocating compressor that is not included in the following options?
What type of heating methods does indirect heating typically involve?
What is the relative humidity if a sample of air holds 0.01 kg of moisture at 21°C when the maximum it can hold is 0.015 kg?
Low pressure hot water heating installations are limited to less than ___________ water pressure.
What does the fire point of oil indicate?
At a pressure of 100 kPa absolute, how many litres of steam will 1 litre of water become?
What type of valve is best used when compressors are controlled by a thermostat?
What is the primary function of a high-pressure float valve?
How many drums does an "A" type boiler typically have?
What is the purpose of the gate valve in a boiler system?
In terms of energy transformation, the kinetic energy of the low-pressure, high-velocity vapor is transformed into what in the compressed vapor?
When using a halide torch detector to find escaping refrigerant, what color does the flame turn?
Which of the following scenarios would require a temperature relief device?
What is added to lubricants to prevent the formation of acids due to oil oxidation?
What does torque measure?
At what temperature does a hot water heater's temperature relief valve typically activate?
Find the lateral area in square metres of a steam pipe that is 15 cm in diameter and 3 m long.
What is the most critical rule for the safe operation of steam boilers?
What does the coefficient of performance measure in refrigeration systems?
The sensing element of a remote bulb thermostat consists of which components?
How are cast-iron sectional boilers held together?
What role does the spring play in a mechanical seal?
When is it permissible to tighten the packing nuts on a boiler gauge glass?
What arrangement is necessary for condensate removal in a steam heating system?
To which code must the specifications of an air receiver conform?
What is the primary component of air?
What is maintained by the flow control or expansion valve in a direct-expansion type evaporator?
What type of cycle is an operation of a system with fixed capacity nozzles controlled by?
Why is the presence of air in a steam heating system undesirable?
What is the ultimate goal of the WHMIS system?
What is an advantage of using plastic piping?
What color should the glass-fronted box for the emergency valve be painted?
What type of vapor condition occurs when the vapor’s temperature is higher than the saturation temperature?
If the refrigerant is R-12 and the evaporator operates at -15°C (5°F) with a specific volume of 0.09102 m³/kg, what is the mass of refrigerant per minute for a volume compressed of 45.24 m³/h?
What type of components are typically found in a compression refrigeration system?
For which type of pressure is threaded pipe and screwed connections generally used?
Which factor is NOT something that is minimized in building air infiltration?
What is the function of the safety valve in a boiler system?
What issue can arise from soot build-up on boiler tubes?
The discharge piping from the relief valve should be piped to a safe point for disposal and can be:
What is the primary component used in a cooling system that affects pressure?
The main parts of a refrigerant reciprocating compressor do not include which of the following?
What aspect must the facilities alternator output match with that of the utilities system?
What type of control can a controller provide for an actuator or relay?
Cooling towers are commonly used when cooling water is scarce, expensive, and a temperature within __________________ of the ambient wet bulb temperature is required.
What type of boiler has a cylindrical shell connected to tubes between the upper and lower tube sheets?
During maintenance, which part of the boiler is crucial to inspect for leaks?
In a compression refrigeration system, the pressure in the evaporator is maintained low by which component?
Which term describes the necessary synchronization between a facility's generator and the utility's power supply?
Which of the following is considered an undesirable feature of microturbines?
Which of the following is NOT a method of controlling the refrigeration compressor output?
Where is the combustion chamber located in a serpentine watertube boiler?
At what speed range do microturbines typically operate?
What type of trap is commonly used with radiators or convectors?
What is another advantage of the forced circulation hot water heating system?
Which of the following is a type of mechanical ventilation system?
What will happen when the pressure in the boiler reaches the maximum allowable working pressure?
Which of the following is a unit of energy?
What is used to change and control the opening of valves?
Which of the following is NOT a reason for a float-controlled valve in a water closet flush tank to leak?
What is the result of simplifying the expression 42 - (6³ x 9²) + 32 - 16 x (4³ - 8²)?
What is the value of 9 x 4?
Refrigerants that are flammable and have low toxicity belong to which group?
Why is it not advisable to use black steel piping for drinking water systems?
What does the diaphragm gas valve do on shutdown?
Which of the following properties affects how a refrigerant interacts with other substances in the system?
What is essential to ensure when configuring an air washer system for maximum efficiency?
What is the relative humidity of a sample of air that holds 0.014 kg of moisture at 21°C, with a maximum capacity of 0.015 kg?
What triggers a fire detector to respond?
What can significantly reduce the rate of heat transfer in a condenser?
What is a significant danger presented by below-ground work?
In the compression refrigeration system, what is the role of the evaporator?
What term is used for a chimney natural draft cooling tower?
In the context of Power Engineering, what do the letters "SIAP" represent?
Which of the following is a main classification of refrigeration compressors?
What does the term CSA stand for with respect to power engineering?
How are boilers in multiple boiler heating plants typically operated?
What is the name of the international code that is enforced by all jurisdictions in power engineering?
What is the basic unit for measuring time?
Flexible couplings are used to compensate for which issue?
In a double-acting type of reciprocating compressor, where does compression and discharge occur?
The sliding vane pump consists of all the following components except for which one?
What transformation does the crosshead in a double-acting compressor facilitate?
What variable is sensed in the On-Off method of steam heating boiler burner control?
At what water level will the low water level fuel cut-off shut off fuel to the heating boiler?
How is vertical adjustment of a roller stand achieved?
What is the boiling temperature of R-22 (Freon 22) at atmospheric conditions?
Small capacity heating boilers operate most efficiently at:
Which type of steam trap operates based on thermodynamic principles?
In a positive displacement pump, what happens to the fluid?
What should be done to the stop valve in the return line of a boiler when the outlet stop valve is closed?
The switch in the operating control of a steam boiler is closed by which condition?
What is a major risk when working from ladders?
What class of boiler incorporates a modular design for improved performance?
How is energy best defined?
What is the "Boiler, Pressure Vessel and Pressure Piping Code" known as?
What is the function of a Material Safety Data Sheet (MSDS)?
Which material is commonly used for indoor sanitary drainage piping in commercial buildings?
How is efficiency often measured in mechanical systems?
What does a check valve prevent in piping systems?
What low voltage might electrical control systems use?
What is a common symptom of a malfunctioning refrigeration system?
In which systems is clean steam typically utilized?
What is essential for maintaining efficient operation in a multi-zone heating system?
Sealed antifriction bearings typically do not need additional lubrication for how many years?
What happens to response time in a forced circulation hot water heating system compared to other systems?
What is the function of the bellows in a thermal expansion valve?
What does anti-foaming agent help prevent in an evaporative condenser?
What type of boiler design is favored for maximizing space efficiency?
What is the purpose of gutters in a building structure?
What does one compartment of a window air conditioner typically contain?
In one design of a mechanical trap, what is used to open and close the trap outlet valve?
What is the purpose of a damper in control systems?
What type of oil problem can lead to bearing issues?
A class "C" fire involves combustion in which type of material?
What does a heat exchanger in a compression refrigerating system transfer heat to?
What is the primary benefit of flue gas passages in cast-iron sectional boilers?
Which of the following is not outlined by the National Building Code of Canada?
Which of the following is not a component of a forced warm-air furnace?
What is the role of fans in induced draft cooling towers?
When using compressed air to start an internal combustion generator set, what is a critical issue?
A straight line drawn through the centre and touching the circumference on each side is called the:
In a multi-zone hot water heating system, how are heating units organized?
What type of air compressor is categorized as dynamic?
What types of operation may an actuator have?
What does the quartz lamp electric infrared heating element consist of?
Which of the following is usually a primary cause of bearing trouble?
When a pilot gas valve is interrupted, what happens to the ignition transformer and pilot gas valve after the main burner ignition?
What is the role of a safety valve in compressor systems?
A boiler in which steam is made at a pressure not greater than 103 kilopascals is termed a:
What is the effect of too much excess air in a combustion system?
Through which pipe do wastes from plumbing fixtures typically discharge?
What is the primary use of liters in measurements?
Which of the following is one of the mechanical ventilation systems?
What type of bearings does a microturbine primarily use to enhance performance?
What is the second pressure controller used in the High-Low fire control method called?
To reduce wear, moving surfaces should be separated by what type of substance?
What type of fans are typically used in induced draft cooling towers for operational efficiency?
The boiler firebox, gas passages and chimney should be thoroughly cleaned by:
Which of the following situations most likely requires manual intervention to reset?
Lobe pumps are similar in function to which type of pumps?
A decimal fraction is a fraction that has what as a denominator?
Which of the following is NOT a property of matter?
What term describes the fluid-to-solid change of state that occurs when heat is extracted?
Which area does NOT fall under the responsibilities of suppliers according to WHMIS?
Temperature changes in the cooled medium are tracked by which control mechanism?
What is a disadvantage of the quartz bulb electric infrared heating element?
The flash point is defined as what temperature related to fuel oil?
When a burner fails to ignite during the ignition trial period, what must be done before the boiler can be restarted?
If for any reason, the burner should go out during normal operation, what must be done?
Which unit is commonly used to measure area?
What percentage does the number 3 represent when compared to 25?
Which of the following statements is true about heating boilers?
What is one of the corrosion risks associated with air in steam lines?
What is the primary function of an evaporator in a refrigeration system?
What potential danger does welding present to others in the area?
What is the primary function of the evaporator in a refrigeration system?
What maintains high pressure in the condenser during refrigeration?
What condition may occur due to poor air control in steam heating systems?
When the return main is located above the water line in a steam heating system, what is this type of return called?
How can mass be defined?
In a multiple heating boiler plant, how are the boilers or modules typically connected?
Unit ventilators are typically equipped with switches to regulate which aspect?
Why should short cycling of the compressor be avoided during the charging of the refrigeration system?
What is the purpose of the heat exchanger in a forced warm-air furnace?
What type of control is classified as operating or primary in refrigeration systems?
What is a noted disadvantage of gravity hot water heating systems?
The operation of a thermostatic trap is dependent on the difference in what?
What component is used to restrict flow from the condenser to the evaporator?
What is NOT required to be included in the WHMIS training program for employees?
Which of the following is NOT a consequence of higher than normal head pressure?
What indicates that a refrigeration system is short of capacity due to a clogged strainer?
Which type of hot oil system heater is recognized for its efficiency?
In terms of fluid movement, what does 'dynamic head' refer to?
What is the conversion factor from psi to kPa?
What is the maximum temperature recommended for radiant panel heating in ceilings?
One of the advantages of the crossflow mechanical draft tower over the counterflow tower is the ______________________ leading to lower energy costs.
What is the first step in the sequence of operations for a natural draft gas fired boiler?
What are the approximate proportions of oxygen and nitrogen in air by volume?
What aspect of the efficiency of evaporative condensers is particularly crucial in certain environments?
What are installed in branch ducts near their takeoff point on the plenum to adjust warm airflow for equal comfort conditions?
What is the purpose of converting units in measurements?
What feature is generally not included in low-capacity unit heaters?
Which document outlines the necessary qualifications for supervisory personnel in power engineering?
How can the high limit control be tested?
What type of pump relies on the kinetic energy of a rotating impeller to move fluid?
What purpose does the electrolyte serve in pure water used for electric boilers?
How often should steam heating boilers with little or no make-up water be blown down?
What is the typical temperature difference in a hot water heating system from the boiler outlet to the return connection?
What percentage of water is evaporated during the actual heat transfer process in a cooling tower?
What is the minimum gradient required for horizontal branch piping 76 mm (3 in) or less in diameter?
Which of the following is NOT considered a contaminant suspended in the air?
Which section of the B-51 code identifies pressure vessels and their installation?
What is the specific heat of water?
What should be taken into consideration when firing up a cold firetube boiler?
What term describes the distance measured around the outline of a rectangle?
When a worker requires a safety harness for entry from the top, how should the harness function?
In which position must the vanes be for the compressor to start according to the vane closed switch?
What is the efficiency range of radiant type oil heaters in a hot oil system?
What does a controller react to in control systems?
What does the thermostatic refrigeration controller produce when subjected to temperature fluctuations?
Refrigerants that are highly flammable and highly toxic belong to which group?
In which situations are evaporative condensers particularly advantageous?
How is the Actual Mechanical Advantage (AMA) calculated?
What component is not generally associated with an electric ignition system?
What is required for a facilities fire pump?
To prevent damage to the reciprocating compressor, what are compressors often fitted with?
Where is the steam space located in a vertical firetube boiler?
Which type of burner control is characterized as continuous adjustment of the fuel flow?
What is the primary purpose of a steam trap?
How are lubrication problems reduced in microturbines?
Which type of control is provided on a boiler with an automatic/manual selector switch?
Which of the following statements regarding microturbines is NOT true?
Which component of a water closet flush tank is responsible for opening the flush?
What is the advantage of using welded joints for piping compared to screwed or flanged connections?
Which type of insulation has a service temperature limit of 150°C (302°F)?
Before adding or subtracting fractions, what must they have in common?
Where can clear definitions for terms related to refrigeration be found?
What distinguishes a locomotive boiler's structure?
Fire regulations and insurance requirements are primarily concerned with what aspect?
What property should oils used as heat transfer fluids in hot oil systems possess?
What information will the "Boilers and Related Components" section of the B-51 code include?
Which of the following is a property of good lubricants?
What is the standard unit of temperature measurement in the SI system?
Which of the following is NOT included in emergency preparation for confined space entry?
What is one disadvantage mentioned about the equipment for electric heating systems?
A thermocouple consists of two dissimilar wires welded together at one end to form a:
Which factor is critical when trying to achieve uniform combustion in a burner?
What is a consequence of overcharging a refrigeration system?
Which of the following applications is unsuitable for a plug valve?
Which type of refrigeration system is classified as a closed cycle mechanical refrigeration system?
What water basin temperature is required for full water flow over the cooling tower fill during cold weather operation?
In an ideal situation, the refrigerating effect of a refrigerant is equal to which of the following?
Which of the following best describes the purpose of WHMIS?
Why is it important to monitor the temperature of water in a boiler system?
Which of the following is not a possible cause of a centrifugal pump overloading the driver?
What does the term 'latent heat' refer to?
In what applications can clean steam be utilized?
Which of the following is NOT included in Section 4 of the MSDS, Fire and Explosion Data?
From the equation A = 0.7854D², how can you isolate D?
A larger residence, located in an area with colder winters, would require a more complex system to maintain satisfactory conditions year-round including all except:
What does the term 'black light' refer to?
What effect does increasing the pressure on the refrigerant have on the boiling point of a liquid?
Air separators used in hot water heating systems trap the air and direct it to the:
Valve packing surrounds which part of a valve?
Which code governs the rules for the construction of power boilers?
What is the specific heat of ice?
In forced warm air heating systems, what is typically adjusted to optimize system efficiency?
What is the appropriate angle for horizontal branch connections to the discharge stack?
Which factor is not typically associated with boiler operation safety?
What might restrict drainage and cause insufficient steam supply to heating units?
Regardless of the type of air conditioning system, the air is mainly conditioned in a/an:
In terms of thermal energy, what does specific heat dictate?
What is the constant temperature at which terminal reheat systems supply air?
Why is it crucial to close the stop valve in the return line?
A type of humidifier known for its wetted element design is referred to as which type?
Which type of humidifier is categorized under residential use and typically involves moisture retention without excessive evaporation?
To prevent flue gases from escaping, the spaces between cast-iron sections are:
What characteristic does a slip expansion joint require compared to an expansion bend?
Which type of fire is classified as a class "B" fire?
How much pressure is equivalent to one inch of water?
Hydrostatic testing of a boiler requires raising the pressure to what level in relation to the Maximum Allowable Working Pressure?
Why is the presence of air in a steam heating system undesirable?
What is the main purpose of using flow switches in refrigeration systems?
What is the primary purpose of an expansion valve in a refrigeration system?
What is the average heating value of bituminous coal?
Which type of heating device is considered the most efficient?
What is a significant disadvantage of the ball float trap?
What is the service temperature limit of Foamed Plastic insulation?
What is a common use of soft-solder fittings in refrigeration systems?
The highest pressure on the pressure gauge of a hot water boiler is set to _____ times the pressure relief valve.
What force should be applied to determine the tension in a blower's driving belt?
If a compressor discharge pressure gauge indicates 1120 kPa and the suction pressure is 70 kPa, what is the pressure ratio?
Which of the following is NOT considered an important physical property of a refrigerant?
Which group is responsible for deciding the qualification criteria for Power Engineers?
Are electric boilers known for being noisy in operation?
What is the main function of a boiler pressure relief valve?
Which of the following is NOT a possible cause of a centrifugal pump not delivering enough liquid?
What must be corrected if the water in the gauge glass of a steam boiler is too high?
What happens to the exhaust gas from the microturbine in a combined heating system?
What type of filter is best for removing fine dust, smoke, and fumes?
Which ASME code sections are most pertinent to the Fifth and Fourth class Power Engineer?
What is the resistance of a photo cell when exposed to light?
How does a forced warm air heating system primarily distribute heat?
What can be done to improve heating efficiency in warm air systems?
What should workplaces do to comply with the WHMIS guidelines?
Under WHMIS legislation, what right do all workers have?
Which system requires air to be moved at a low speed to maintain efficiency?
One of the advantages of the crossflow mechanical draft tower over the counterflow tower is the:
Boiler explosions are classified into which two general categories?
What is a primary advantage of bent tube boilers?
What is the distance from the center of a circle to its circumference called?
The programmed startup sequence of oil-fired boilers with no pilot light begins with:
For optimal operation, what must be considered in the feedback loop of a cooling system?
Convection type oil heaters in a hot oil system typically have what efficiency?
What happens when a steam trap leaks?
What component regulates the flow of liquid refrigerant into the evaporator?
Which of the following base units includes a prefix?
What is the function of metal fins attached to the tube of a convector?
What type of valve is used on gas and oil-fired boilers?
What component is NOT part of an external gear pump?
What is defined as the sum of static head and dynamic head in a pumping system?
What is the product of the fractions 3/4 and 1/3?
What is usually the cause of bearing trouble?
In a two-pipe direct return hot water heating system, how is water supplied to heating units?
Suppliers must provide which of the following to comply with WHMIS regulations?
Which refrigeration process component is primarily concerned with increasing the pressure of the refrigerant?
What is one of the basic methods of ventilation?
What is a potential cause for insufficient steam supply if there is steam bypassing to the return line?
Centrifugal pumps can be divided into several types except which of the following?
What is the service temperature limit of Mineral Fibre insulation?
Which boiler type eliminates a significant amount of refractory material?
A common type of water heater that incorporates an automatic gas-fired storage heater and features a single tank used for both heating and storing the water is the:
In electric heating systems, what aspect is typically highlighted as advantageous?
How is a Confined Space defined?
What could be a reason for insufficient steam supply to heating units in a steam system?
What is an advantage of the forced circulation hot water heating system?
How old can an MSDS sheet be at maximum?
According to applicable codes, how much refrigerant can be discharged into the atmosphere using a manually operated valve in case of emergency?
In an oil fired boiler, how does the fuel enter the furnace before being ignited?
What is a major disadvantage of using compressed air to drive tools compared to electricity or steam?
What type of heat does the refrigerant vapour give up first in the condenser?
What is the source of feed water for generating clean steam?
What components make up the motor operator used with a motor-operated valve?
What occurs to the temperature of a liquid when heat is added during a phase change?
What type of air do fans at the top of the induced draft cooling tower discharge?
What characteristic should oils have to be suitable for a hot oil system?
In the Canadian Standards Association B52-05 Mechanical Refrigeration Code, refrigerants are classified into how many groups based on toxicity and flammability?
How is velocity defined?
What is the general rule for evaporation temperature in a compression refrigeration system in relation to the cooled medium?
Where are the electrodes located in an electrode type electric boiler?
What type of failure can excessive vibrations cause in bearings?
Convert 3 m, 2 cm, and 4 mm to inches.
If a table has a surface area of 1140 in², what is its area in cm²?
When does the thermal expansion valve work most efficiently?
Which component is essential for reducing water loss in cooling towers?
Which component allows the compressor in microturbines to draw in air?
The loss of heat from a substance will cause its temperature to drop. What is the term for the heat removed from the substance?
What regulates the output of an immersion electric boiler?
Which component is NOT included on the low-pressure side of a compression refrigeration system?
What type of circuit allows for both local and remote control of lights using relays?
Which of the following is a document for standards in the design of pressure piping?
What problem do pressure relief devices effectively eliminate?
What is the symptom of a refrigeration system when the compressor discharge pressure is too low due to too much condenser water?
In addition to sterilization, where else may clean steam be utilized?
What is the maximum diameter for which schedule 40 steel refrigeration piping may be used?
What is the emission temperature range of a low temperature catalytic heater?
What characteristic should oils used as heat transfer fluid in a hot oil system possess?
What component of an internal combustion engine is rotated by the electric starter motor?
Which type of control can accomplish the operation of starting, stopping, and unloading the compressor?
Which component is essential for creating a vacuum to lift liquids in a centrifugal pump?
What shape does a plug valve consist of?
What is one potential issue that can arise in a refrigeration system's condenser?
Which component is responsible for removing water impurities in a refrigeration system?
The counterflow mechanical draft tower occupies less floor space than a crossflow tower but is ___________ for a given capacity.
What does the infrared scanner in a boiler system contain?
When dividing fractions, which of the following is the first step?
What is the primary function of solenoid valves in boilers?
What is the term for the air that is intentionally removed from a building?
Why is it easier to modify regulations compared to Acts?
In cooling tower design, what is the primary factor in determining efficiency?
What is one of the main disadvantages of a central air conditioning system?
How do gate valves operate in relation to the path of flow?
How was the crown sheet of a locomotive boiler secured?
What is the maximum temperature for radiant panel heating in floors?
What is the primary purpose of lubricants in machinery?
When taking a steam boiler out of service, what is the temperature the water must be maintained above for about one hour to release gases?
According to the CSA B52 Mechanical Refrigeration Code, what is the maximum pressure at which the pressure limiting device should stop the compressor?
Soft-solder fittings can only be used in refrigeration piping for tubing of what outer diameter or smaller?
What is the main purpose of fins on a fin coil?
What is the most common fuel used for microturbines?
What is the function of filtration in an air conditioning system?
WHMIS stands for:
In which environment should paint be stored?
In central or combined air conditioning systems, free cooling can be achieved when the supply air temperature for a building is:
What effect does insufficient liquid refrigerant in the evaporator have?
The electrode type electric boiler consists of two cylindrical chambers. What are they?
What is the purpose of allowing a small amount of leakage from the packing gland of circulating pumps?
What is the formula for finding the area of a rectangle?
How can a pressure gauge be most accurately calibrated?
Which of the following is typically not included with intercoolers?
What does the term "work" refer to in physics?
Which type of trap operates on a mechanical principle?
What is the excess energy source used for vaporization in a compression refrigeration system?
What is the wind velocity used to calculate summer infiltration heat gains?
Which component is activated to ignite the pilot gas valve in a natural draft gas fired boiler?
Which of the following is a disadvantage of using a face damper for evaporator capacity control?
Which component is crucial for transferring heat in forced air systems?
What must be done to piping threads before they are joined?
If a safety valve has a popping pressure of 250 psi, what is its equivalent in kPa?
What action should be taken if a tube leak is suspected during boiler operation?
What is the "Mechanical Refrigeration Code" referred to as?
What is the primary use of a refrigerant?
Which of the following best describes kinetic energy?
What is the primary function of a photo cell in a lighting system?
When does a material typically undergo latent heat of solidification?
What is the normal supply pressure of the compressed air used for starting the engine in a microturbine?
What precaution should be taken when dealing with a worn impeller in a pump?
What value does the SI prefix "mega (M)" represent?
What is the minimum refrigerant quantity that requires a manual discharge valve in the event of an emergency?
What safety device prevents the startup of a centrifugal refrigeration compressor?
What is a major source of injury to the public in a building environment?
In the case where the pump is below the source of supply, what is NOT required during priming?
What does the latent heat removal in a cooling tower primarily occur through?
What is the main advantage of foil bearings in microturbines?
Which of the following is NOT considered a personal precaution?
Which heating system is most suitable for buildings with a concrete slab floor and no basement?
Which of the following is not a method used to start internal combustion generator sets?
To convert horsepower to kilowatts, what is the approximate conversion factor?
What connects the tubes of a serpentine watertube boiler to the upper and lower headers?
In power engineering definitions, what is meant by 'heating surface'?
What component is necessary in multi-zone hot water heating systems to equalize flow resistance?
How do you calculate the lateral surface area of a cylindrical tank that is 3 m in diameter and 12 m long?
Which of the following components are commonly found in systems to reduce water hammer effects?
What is the benefit of having all heating units receiving water at the same temperature?
Which of the following can lead to flaking and pitting of bearing surfaces?
How deep should heating coils in a snow melting system be embedded below the concrete surface?
What is the service temperature limit for Glass Fibre insulation?
How is the diameter of commercial pipe typically measured?
What is generated when the hot junction of a thermocouple is heated?
Which factor does NOT affect the performance of a refrigeration system?
What is the term for the control of light produced by a lamp using surfaces that refract, reflect or absorb light?
Which measurement is associated with the term 'heating boiler'?
Vertical firetube boilers are advantageous when which condition is restricted?
What is the correct safe working angle for a ladder when positioned?
The boiler vent valve is used for the purpose of allowing:
What organization meets annually to discuss important issues related to Power Engineers?
What describes a fraction where the numerator is greater than the denominator?
What are the pressure and temperature limits for steam heating boilers?
Who is legally allowed to perform welding on pressure parts of a boiler?
In plumbing, what is the purpose of a downspout?
To what height in metres must a tank be built to store 27.3 kL of liquid if the base is 4 m by 4.2 m?
What is commonly overlooked during routine checks on a heating system?
When does the combination pressure and temperature relief valve typically open?
What is the primary function of ventilation in an air conditioning system?
The inner walls and floors of certain heat systems are typically lined with what material?
What determines the classification of the certificate of competency for the role of chief power engineer?
What pressure is a single-stage centrifugal compressor typically capable of compressing atmospheric air to?
When using the air washer for dehumidification, the spray water temperature must be:
What is the term for the forcing of air into a building by means of fans?
Which type of humidifier is commonly used for residential purposes?
Which of the following gives the correct expression for D given the area A = 0.7854D²?
Which of the following is NOT an advantage of the venturi induced draft cooling tower?
What is the primary purpose of the ASME code?
What is a common operational challenge for cooling towers in warmer climates?
One of the main functions of the compressor in a refrigeration system is to raise the pressure and temperature of what?
What is a benefit of using multiple boilers in a heating plant?
Which of the following is an advantage of a forced warm air heating system?
What component is used to join the grooved pipe system?
The operation of a system with fixed capacity nozzles is based on what cycle type?
What process occurs from the warm convector cabinet surface?
What type of connection is commonly used for joining sections of boilers?
What type of valve is commonly used as a boiler stop valve?
What type of signal operates the solenoid valve in a refrigeration system?
Why must air present in steam lines and equipment be removed?
Which of the following statements about the flow of heat energy is true?
An electric starter motor for an internal combustion engine is typically powered by which voltage?
How often must extinguisher shells used on foam fire extinguishers be hydrostatically tested?
In emergency situations, which type of lighting must be automatically provided for safe egress?
What is the maximum temperature for an infrared scanner mounted on the end of a sighting tube?
What can result from the loss of bearing metal?
Conduction heat gains are assumed to be equal to the temperature of which surface?
Kinetic energy (KE) is defined as:
Which component in a refrigeration system is responsible for storing refrigerant during charging?
What condition must be met to ensure complete combustion of fuel in a furnace?
What happens to ice as it loses temperature?
Who is ultimately responsible for maintaining safe conditions against fire hazards in a building?
What is the formula for calculating E when given P and I using the equation P = EI?
If you have the volume formula for a rectangular prism, what does the formula V = lwh transpose for h yield?
What method do cast-iron boiler sections use to maximize heat transfer?
What is one of the key characteristics of the combustion process in microturbines?
How can you derive the formula for P using E and I from the equation I = P / E?
What is considered the forerunner of the modern packaged firetube boiler?
Through which valve is the pressurizing gas admitted to the refrigeration system?
What should NOT be done when an elevator stops between floors?
What is a key feature of electric boilers?
What type of movement does a basic ball valve require to go from fully open to fully closed?
Copper and copper alloys are known for their great resistance to which of the following?
What group assures that all Power Engineer examinations conform to jurisdictional legislative requirements?
Which practice is crucial for minimizing injury while working?
What is the name given to the component that coordinates and sequences the boiler operation?
If oil has a low viscosity index (VI), what does it indicate about the oil's viscosity?
What is the primary hazard of overcharging a refrigeration system?
Three-way valves in hydronic heating systems are used for what purpose?
Why must centrifugal pumps be located close to or below the liquid surface?
A larger residence in a hot summer area would not require which of the following for year-round conditions?
What type of power supply does a typical electric starter motor require?
Why is allowance for expansion and contraction of piping necessary?
What controls the load on an electrode-type electric boiler?
What information is NOT provided in Section 3 of the MSDS, Physical State?
If the water level in a steam boiler is below the gauge glass, what should be the immediate action?
Which symbol indicates a quantity of 1,000,000 in the SI system?
Which component is essential for maintaining operational pressure in a cooling system?
When should a complete check of the boiler heating system be performed?
Which type of valve maintains a constant pressure in refrigeration applications?
What type of burner is classified as an air or steam atomizing burner?
Pressure can be defined as what?
In measuring area, which two dimensions are multiplied together?
What is a primary preventive measure to avoid slips and falls in an environment?
What is the main function of a thrust bearing?
Which of the following is NOT an advantage of using electricity as a source of heat compared to other heating systems?
To find the common denominator between two fractions, which of the following operations is NOT necessary?
The float operated low water fuel cut-off functions based on which principle?
How can ammonia leaks in refrigeration systems be detected?
What pressure is the oil supplied to the burner mechanical atomizing nozzle?
At what temperature is the water in a hot water heating system typically maintained to ensure safety?
What is the minimum graduation requirement for a pressure gauge installed on the high side of a refrigerating system?
How should the admission of fresh air into a room be managed to ensure comfort?
How can the draft created by the fan be controlled?
What is the best way to ensure adequate attention is given to the boiler and its control equipment?
A _________ valve, also called an automatic fill valve, is needed to keep a hot water heating system with a closed expansion tank automatically filled and under proper pressure.
At what temperature does the temperature relief device typically open?
What is the maximum pressure allowed for a low-pressure steam heating boiler?
What should not be done without determining the location of and repairing a system leak?
What is the function of the sealing ring in a rotating mechanical seal?
What property is important for the longevity of bearing performance?
What is an essential function of the alternator in a microturbine system?
What is the purpose of the expansion tank in a hot water heating system?
What is the result when infrared heaters send out radiant energy to an opaque object?
What is the primary purpose of filters in a forced warm air system?
Which device is used to prevent backflow and control cross connections?
What should the condenser pressure be in a refrigeration system?
The suction pressure of a compressor is vital for which part of the refrigeration cycle?
Which of the following is an example of synthetic oils?
In a steam heating system, how must the piping and heating units be arranged?
What is not an advantage of using a light-duty, low-voltage circuit to control relays?
What can cause insufficient steam supply if air vents are malfunctioning?
During the operation of a forced draft cooling tower, which of these statements is NOT true?
What color change indicates a leak in ammonia refrigeration systems when using wetted litmus paper?
What is likely a disadvantage of using screwed connections in piping?
What does the compressor in a refrigeration system primarily draw from the evaporator?
To ensure building safety, what practice should be regularly conducted?
Which component is essential in a compressor to manage the temperature of compressed air?
What can be cancelled out in the multiplication of two or more fractions?
In the relationship P = EI, how would you express I if you have E and P?
Which component is essential for the operation of a serpentine watertube boiler?
A turning moment or "Moment" refers to what?
What information is NOT required on the information card for refrigeration systems over 125 kW?
What is the primary function of an air dryer in compression systems?
Which type of contaminant is most effectively removed by a charged-media air cleaner?
What is the purpose of the equalizing line in a thermal expansion valve?
What is typically true about the design of rotary compressors?
Which two Canadian codes are important to the Fifth Class Power Engineer?
The Material Safety Data Sheet contains information in how many specific areas?
A machined and slightly tapered piece of pipe found in cast-iron sectional heating boilers is referred to as a:
The reduced pressure principal device consists of two independently acting check valves with an automatic operating _______________ valve located between the two check valves.
What component works to maintain the seal in a plumbing trap?
How should horizontal refrigeration piping lines be sloped in the direction of refrigerant flow?
What is NOT a typical cause of bearing trouble?
Which action is essential for documenting boiler operation effectively?
The coefficient of thermal conductivity (k) measures what aspect of a material?
What is one of the main functions of lubrication?
How much greater are heat losses through large, single-pane window sections compared to ordinary walls?
What is typically necessary for effective pump operation?
What smoke is produced by a sulphur candle when exposed to ammonia fumes?
The primary purpose of a P-trap is to:
Which of the following is NOT typically found in Acts related to power engineering?
Which device detects the flame in a natural draft gas fired boiler?
What term describes the vertical distance from the water source to the water surface in the discharge tank?
What physical state does water form when it undergoes solidification?
What factor does the thermal resistance of a material depend on?
In the context of humidification, what is the main output of water vapor doing?
When priming a pump with a separate hand-operated pump, which step is NOT necessary?
What should an outdoor thermostat do to protect the snow melting system?
What temperature do combustion gases drop to when passed through a secondary exchanger?
An air gap is defined as a separation between what two entities?
What type of light do air sterilizers use to destroy bacteria and spores?
Which of the following is essential information typically included in a Material Safety Data Sheet?
What is the reduced form of the fraction 16/64?
If the combustion control safety lock-out switch is tripped, what should be done?
What is the function of the male rotor in a rotary screw compressor?
What is the primary function of an impeller in a pump?
What is a fundamental requirement for the operation of a generator set that utilizes an electric starter?
During which condition might an automatic shutdown device operate in a typical two-stage compressor?
What can high operating temperatures lead to in bearings?
What symptom might suggest that the compressor discharge pressure is too high due to improper operation of the evaporative condenser?
Which of the following is NOT typically a control found on heating boilers?
Governmental agencies related to fire regulations primarily focus on what?
What is the formula for finding the volume of a rectangle?
What characteristic describes the plug of a plug valve?
What is the reason oxygen should not be used to pressurize a refrigeration system for leak checking?
Which refrigerant classification denotes the highest safety level?
What is the minimum size for a vertical drain pipe and blowoff valve in an automatic low water level fuel cut-off and water feeding device?
What is the function of an actuator in control systems?
What is the desirable range of humidity from a health standpoint?
What would the correct rearrangement of I = E / R yield if solving for R?
When calculating the perimeter of a rectangle, which formula should be used?
Ultrasonic motion detectors send out an inaudible tone, capable of __________.
What does the presence of bulges or blisters on the fireside of a boiler indicate?
Which of the following services is NOT provided by lubricants?
What does a relay consist of in electrical controls?
Seamless steel pipe is primarily used for which type of service?
During the condensation process in a compression refrigeration system, the high-pressure superheated vapor first gives up which type of heat?
What type of handle design must the valve to the pressure gauge on a hot water boiler have?
What does purging a furnace involve?
The original dimmer type that diverted current used a/an:
What is essential for the ignition of fuel in a furnace?
What is true about packing in the stuffing box of a centrifugal pump?
According to local codes, what is the minimum amount of outdoor ventilation air suggested per person in places without smoking?
From the equation V = lwh, how can you isolate l when given V, w, and h?
What type of valves are globe valves primarily used for?
A disadvantage of condensing boilers compared to customary boilers is:
Which of the following actions can help to improve the efficiency of a refrigeration system?
Which term describes the general group of using electricity for comfort heating?
What is a disadvantage of atomizing humidifiers?
What type of lever has the fulcrum placed between the effort and the load?
Which mathematical operation would you perform first in the order of operations?
A pressure-actuated refrigeration control cannot be used with which type of expansion valve?
Which of the following additives is NOT typically used to improve the characteristics of lubricating oil?
How should you manipulate the formula for the area of a circle to express A?
What is the circumference of a circle calculated using?
Two main classifications of pumps are categorized as:
If a table has a surface area of 5568 cm², what is its area in square inches?
Which boiler item is essential to check monthly for proper operation?
Where is the thermostat located in a direct type of temperature-actuated refrigeration control?
What does thermal resistance (R) represent?
The ideal flash point for a safe fuel oil storage would be at what state?
What describes potential energy (PE)?
What term describes the temperature above the flash point needed to sustain combustion?
What is the primary non-condensable gas that may leak into a refrigeration system?
How is oil added to the refrigeration system while the compressor is operating?
High friction in mechanical systems can lead to what?
Is it true that a low percentage (15%) of the energy delivered by electricity is absorbed as heat in the boiler?
What is the name of the furnace configuration where return air enters from the top and supply air leaves at the bottom?
What symptom indicates a noisy compressor or system due to a dry or scored seal?
What is primarily found in the bellows of a remote bulb thermostat?
What is a common disadvantage of forced warm air heating systems?
What is the primary function of heating coils in snow melting systems?
How far can a flat disc in a butterfly valve typically rotate?
The cold deck air in a dual duct system is supplied at approximately __________ on a year-round basis.
What is a potential consequence of not addressing an overheated boiler?
The humidification process primarily involves adding which element to the air?
In the HRT boiler, the hot combustion gases pass:
From where does heat energy always move?
What happens to a fraction if you multiply its numerator or divide its denominator by a number?
What term is used to describe the air used for atomizing fuel in a burner?
Which of the following refrigerants is known to be not miscible with oil?
At what temperature should evacuation of the refrigeration system not be attempted?
What component in the compression refrigeration system absorbs heat from the surrounding medium?
If there is an air lock after repairs have been made on the piping system, the operator should:
What is the primary unit of measurement for a single dimensional object?
What does low voltage refer to in electrical controls?
What is indicated by air leaks in the suction line of a centrifugal pump?
Which of the following responsibilities does NOT fall under a building operator's duty for safety?
What type of emergency lighting is required for office buildings with occupancy over 1000 according to the Life Safety Code?
What characteristic of lubricants is important for their effectiveness under pressure?
Under the WHMIS system, which of the following is not a responsibility of suppliers?
When preparing for confined space entry, which material hazard is considered 'unique' to that entry?
What is the minimum flow velocity required in horizontal piping to prevent blockage?
Which component is NOT found in a simple closed-cycle compression refrigeration system?
What is one significant advantage of electric boilers?
Which property of a refrigerant is critical in determining its effectiveness in a refrigeration cycle?
What symptom may indicate a lack of refrigerant in a refrigeration system?
What is required before a boiler can be fired?
An immersion type electric boiler contains which of the following components?
What could excessive temperature lead to in bearings?
What is a requirement for all welding repairs on boilers according to provincial regulations?
What type of boiler often requires careful management of the combustion chamber contents?
At what speed should air be moved through dry filters?
The pressure-actuated refrigeration control is primarily actuated by what element?
What does the compressor do in a refrigeration system?
During the coldest winter days, what percentage of outdoor air is typically used in a system designed for 12.5°C (55°F)?
An advantage of a multiple heating boiler plant is:
Which issue can arise from cold drafts in a room?
What is a common issue that might lead to the failure of a boiler feed pump?
What kind of switch is typically used to prevent overheating in a heating boiler?
What is Secondary Air (SA) in relation to fuel contact?
In a mechanical seal, which component typically remains stationary?
In boiler operation, what does overheating usually indicate?
When pressure inside the Bourdon tube increases, what is the expected behavior of the tube?
The principle behind kinetic energy involves:
What is the formula for the area of a circle?
Which of the following is NOT an important physical property of a refrigerant?
What should be done if the surrounding air temperature is below 20°C during evacuation?
What is the main function of a pipe siphon in a boiler?
The letters CRN stand for what in the context of power engineering?
Which chemical treatment is essential for a proper evaporative condenser program?
Fixed oils, also called fatty oils, are produced from all of the following except?
According to the Life Safety Code, how long does it allow for a standby engine to start and provide power in medical areas?
Which of the following would be considered a responsibility of an employer under WHMIS?
Which of the following are advantages of packaged watertube boilers?
What is the purpose of the condenser in a compression refrigeration system?
During annual inspections, what should be checked in hot oil heater tubes?
Air in hot water heating systems forms air pockets which___________.
What should be applied to male pipe threads before assembly?
How many helical lobes does the male rotor in a helical screw compressor typically have?
What classification does the HRT boiler fall under regarding passes?
What happens to the main gas valve after the flame is detected?
What compound is formed when overheated oil breaks down?
A heating boiler must have a permanently attached marker indicating:
Which heating system provides individual room temperature control effectively?
What should metal surfaces be painted with to protect them during damp conditions in the idle season?
What happens to the fuel valve when the combustion air pressure drops too low?
What is a primary method for regulating airflow in combustion systems?
What is the typical flue gas temperature at the exit of an older warm air furnace?
What is considered the "damaging factor" of an electrical circuit?
What wire is used to transmit electric current to the burner in a typical electric control system?
How deep is the trap system designed to maintain its seal?
What is the inside diameter for a 60.3 mm (2 inch) nominal pipe size?
Which of the following is a common type of pump used for transferring liquids?
Which aspect of workplace safety does WHMIS emphasize?
Flow switches are used on chilled water lines primarily as what type of switch?
Which property of refrigerants indicates their ability to dissolve in oil?
What process does a positive displacement compressor use to handle a charge of free air?
What causes faucet noises such as "chattering" or "whistling"?
What type of air is used primarily in an air atomizing burner?
Which component in electric boilers is crucial for preventing overheating?
In multiplication, which term refers to the number that another number is being multiplied by?
What condition triggers the safety feature of a boiler to operate?
What is the term for the formula used to determine the area of a circle?
A hot water heating system, also known as a ________ heating system, is similar in many respects to a steam heating system.
What is the term for the amount of air required beyond the theoretical air for complete combustion?
Shell, sleeve, or journal bearings typically have what kind of lining?
To reduce the effect of water hammer, suction and discharge lines of pumps are often equipped with which of the following?
In larger capacity refrigeration compressors, which valves should be operated prior to starting?
What tool is used to remove the burr left inside a pipe after cutting with a wheel and roller cutter?
What is a limitation of semi-solid lubricants (grease) during lubrication?
What is the risk of too much liquid refrigerant in the evaporator related to system components?
In a warm air heating system, what could cause insufficient heat if the warm air supply temperature is excessively high?
Infrared heating is a form of which type of heating?
Which factor controls oil temperature in a hot oil system?
What term is used to refer to the provinces and territories of Canada within legal documents?
Which of the following is critical for building safety?
What does the valve stem connect in a valve assembly?
What is the condition of the refrigerant in the evaporator before it absorbs heat?
What does the low oil sump temperature protection device ensure before the compressor starts?
For what purpose can clean steam be utilized?
Which type of emergency lighting is required by the Life Safety Code for places of assembly with more than 1000 people?
What is the main goal of training workers in a WHMIS program?
The single zone, constant air volume system is most similar to what?
Where should the refrigeration system condenser pressure be in relation to the saturation pressure?
On a hot water boiler, the highest value on the graduated scale of the pressure gauge shall not be less than ______ times the pressure at which the pressure relief valve is set.
What characteristic feature helps a centrifugal pump function effectively?
What does the radiator trap prevent from discharging?
What is the average heating value of Natural Gas in kJ/m³?
How many hazard classes does WHMIS consist of?
Which of the following represents a characteristic of all matter?
If the pilot burner fails to ignite, what occurs after a short period of startup?
What identifies the classes of hazards in WHMIS?
If a compressor has a volumetric efficiency of 70% and the theoretical mass is 8.65 kg/min, what is the actual mass moved?
What are the regulations associated with an Act meant to enforce?
What is the equivalent of 5 Imperial gallons in liters?
What is a primary function of a balancing valve in heating systems?
During operation, hot gases expand in which part of the microturbine system?
What is a common feature of a non-recirculating hot water system?
How is an intermittent pilot ignited during operation?
What can happen if unburned fuel collects in the furnace?
How is the outdoor air quality necessary for ventilation often measured?
What is the maximum steam pressure recommended for a steam heated pan humidifier?
What is the significance of the air receivers in the B-51 code?
What is a main disadvantage of using an electric boiler?
Why must you avoid running a refrigeration system below 14 KPa when pumping down?
For which pipe sizes are screwed joints limited in refrigeration piping intended for pressures of 1750 kPa and higher?
What process is used to maintain temperature and supply fresh air in occupied areas?
What temperature is typically required for sterilization in kitchens and laundries?
What is the typical voltage used in many home electrical systems?
What code contains recommended rules for the care of nuclear power plant boilers?
How does a natural draft ventilation system operate?
What is the primary function of a pump?
What benefit do electric systems provide in terms of operation?
What is 7/10 expressed as a percentage?
What does priming of a centrifugal pump entail?
Which component in a refrigeration system is responsible for absorbing heat?
A typical range for the pressure setting of an automatic fill valve (pressure reducing valve) in a hot water heating system is:
Which of the following rules for writing SI symbols is incorrect?
What percentage of oxygen is found in the atmosphere?
Which refrigerant has a strong, pungent smell?
Which MSDS section contains information about handling and storage?
Viscosity is a measure of what property of oil?
What is the responsibility of the person assigned to attend a worker in a confined space?
What is the role of the ignition transformer in the boiler startup sequence?
If the stuffing box bore on a pump is 63.5 mm and the shaft diameter is 50.8 mm, what size packing should be used?
What is one main purpose of the CSA B-52 code?
In hot oil systems, what does the acronym FCV stand for?
What is the maximum temperature for radiant panel heating in walls?
What is the term for the constant distance from a point to the circumference of a circle?
What is the service temperature limit of insulating cement?
Which substance does a steam trap primarily discharge from steam lines and equipment?
What aspect of a heating system can lead to excessive noise if not properly designed?
Which code contains rules for the construction of low-pressure hot water supply boilers?
What does the distributor ensure in a direct-expansion compression refrigeration system?
In a compression refrigeration system, the distributor is directly downstream from which component?
How can you express R in terms of A when using the area formula A = πR²?
What is the primary benefit of using variable speed fans in cooling towers?
Which compressor type requires the use of a shaft seal?
In portable locomotive boilers, where was the draft inducer typically found?
At what temperature can activated carbon in an odour adsorber be reactivated to drive out adsorbed gases?
What is a primary benefit of using a steam heated pan humidifier with a modulating control valve?
What should be avoided in the lubrication process to maintain optimal performance?
Which of the following contributes to creating a safe working environment?
What happens to the refrigerant in the compression cycle when it exits the compressor?
From where does warm air flow into the system that distributes air in a warming system?
What is a common reason for a warm air heating system to not function effectively?
In the event of a fire in a commercial office building, what is the first action that staff should take?
If the amount of air in excess of the theoretical air is 6 kg, what percentage does it represent?
In a moderate climate, a small residence may only need a source of what for odour control?
The longitudinal drum boiler is classified as what type of combustion gas pass boiler?
Solid lubricants are best suited for use under which conditions?
What characteristic should oils intended for heat transfer fluid have?
In the refrigeration process, heat is transferred from the substance to be cooled to which lower temperature substance?
What is an advantage of using a refractory burner?
What is the formula for E derived from the equation P = EI?
What is the primary way water extinguishes a fire?
What is a common unit of measurement for area?
What is the simplification of the expression 6² ÷ (2² + 15 - 3 - [6 ÷ 2]) x 1 + 3³?
What is added to pure water to allow it to conduct electricity in electric boilers?
What is the primary benefit of maintaining an air gap in potable water systems?
Confined spaces can include all of the following EXCEPT:
In a centrifugal compressor, what is transformed into potential energy?
What is one of the basic methods of ventilation?
What should be done when a refrigeration system is down for a prolonged period?
Why is it critical to use the correct viscosity oil in machinery?
What is necessary before tightening the nuts on a boiler gauge glass?
Which of the following statements about measuring voltage is incorrect?
What is the thermal heat flow through a unit area of material commonly measured in?
Given the volume formula V = lwh, how do you solve for w?
What is the normal maximum air pressure in a dry pipe sprinkler system?
The non-return stop valve in a steam system is typically connected to what?
What is the potential outcome of improper admission of fresh air into a room?
HRSG is the acronym for which of the following?
After the air is heated in the heat exchanger section, it leaves the furnace via which component?
Which of the following is NOT an item to check in preparation for a confined space entry?
What is a potential consequence of having too much refrigerant in the evaporator?
What is the conversion of 4 miles and 340 yards to kilometers?
Which refrigerant group indicates a low level of flammability?
How long should a condensate receiver tank be able to hold water at normal steaming rates?
What other purpose does the CSA B-52 code serve besides safety?
Which of the following is one of the three basic components of the WHMIS system?
A centrifugal pump with high suction lift and negative casing pressure is likely to have what feature?
The maximum allowable pressure in a heating boiler ensures:
Which section of the ASME code would you refer to for pressure vessel design standards?
What unit is used to express thermal transmittance (U-factor)?
What does line voltage refer to in electrical controls?
What is the maximum operating temperature that bearings can withstand?
Most plumbing fixtures need a minimum of ____________ water flow pressure.
If there is insufficient flow in the hot water system, a probable cause would be the:
What is the employee's responsibility regarding safety?
What happens to water when it reaches its freezing point?
How many tonnes of refrigeration are produced when 251,244 kJ are removed in one hour?
What type of heating element does the quartz tube electric infrared heating element use?
What structural feature is common to firebox boilers and locomotive boilers?
When steam is supplied upwards through risers to heating units, what is the heating system referred to as?
Which of the following is NOT a potential hazard of confined space entry?
What is one of the general classes of traps based on their principle of operation?
What is a major day-to-day priority concerning building safety?
What term describes the refrigerant’s ability to change from liquid to vapour in the evaporator?
What does the Celsius scale mark as the boiling point of water?
Thermal conductivity (λ) represents what type of heat flow through a material?
The induced draft cooling tower has one or more fans located at the top of the tower that ______________ the downward flow of water.
What is the result of simplifying the expression (42 + 6) x 9 - 32 + 16 ÷ 4 - 8?
What is the service temperature limit of Magnesia (85%) pipe insulation?
How many inches are equivalent to 24 centimeters?
In Section 1 of the MSDS, which information is NOT typically provided?
Infrared motion detectors are designed to respond to:
What temperature range must be maintained at the evaporator outlet for maximum efficiency?
How much heat is required to melt 1 tonne (1000 kg) of ice at 0°C in 24 hours?
Which of the following is NOT part of WHMIS training for employees?
What should be minimized in building air infiltration while still providing necessary fresh air?
Any two-dimensional object is measured in units of:
How many specific areas of information must the supplier label contain?
What type of resistance does cast iron have that makes it suitable for sewage and storm drainage lines?
In a humidification system, the element used for moisture dispersion that maintains contact with the water surface is called?
To convert a decimal fraction to a common fraction, which term describes the nonzero portion of the decimal?
In steel plate heating boilers, what is the purpose of the thin steel installed in the firetubes?
What is the service temperature limit of Calcium Silicate insulation?
Which statement about rotating mechanical seals is false?
Which term is used to denote a comparison of a part to a whole in terms of 100?
Which condition can cause damage when a firetube boiler is heated too quickly?
What material are packing gland seals commonly made of?
If the refrigeration compressor is equipped with an oil sump heater, what must be ensured about the oil temperature?
What is the equivalent of 21 USCS gallons in liters?
What does the refrigerant flow control affect in a refrigeration system?
What does the coefficient of utilization (CU) of a lamp describe?
Which boiler type is similar in construction to a Firebox boiler?
What is the function of the IPECC in power engineering?
Which of the following refrigerants is likely to be included in a closed-cycle compression refrigeration system?
Relative humidity is best defined as which of the following?
Piping in hot oil systems that is 25.4 mm (1 in) in diameter or smaller should be classified as which schedule?
What does steam give up in the radiators, convectors, and coils?
What type of service are three-way valves primarily associated with?
What is a critical factor in selecting piping for clean steam applications?
What class of WHMIS hazard classification has three hazard symbols?
What are the vertical pipes that transport steam to various floors in a heating system commonly called?
What type of evaporator operates through dry/direct expansion?
What is the service temperature of Reflective Metal Insulation above?
What is the function of a hydraulic oil pump in a motorized gas valve?
Which type of condenser is classified as a commonly used one in refrigeration systems?
The rotary design of refrigeration compressors does not include which of the following?
Which of the following is NOT a thermodynamic property of a refrigerant?
How much moisture can silica-gel adsorb in relation to its own weight?
Excessive water drift in a cooling water tower may be caused by all factors EXCEPT:
In an improved design of a thrust bearing, the bearing surfaces are shaped like:
In the fuel gas system to a hot oil heater, what does the acronym PRV stand for?
What type of particles are carried through the charged-media air cleaner and attracted to the filter media?
The time taken for the automatic pilot valve to close in the event of a loss of flame detection is about ______ seconds.
What voltage should portable lamps used inside a boiler be limited to in order to eliminate electrocution risk?
Moisture can increase the amount of current flowing through the body by how many times?
What is a disadvantage of using threaded pipe and screwed connections for joining lengths of piping?
How many USCS gallons are equivalent to 97 litres of gasoline?
Which method is commonly used to provide expansion in pipelines?
What occurs when the two-way pilot valve in the diaphragm gas valve is activated?
The plate surface evaporator is usually categorized as which type of evaporator?
What type of outlets should be positioned to prevent cold drafts and maintain even room temperatures?
What is the Celsius equivalent of absolute zero on the Kelvin scale?
Which hazard symbol is associated with Class D in WHMIS?
Which code contains guidelines for the care and operation of heating boilers?
What is a common issue related to insufficient refrigerant in the evaporator?
What are the two types of boiler combustion control?
What can be a result of improper installation of pressure relief valves in boilers?
If a warm air heating system is not providing sufficient heat, what could be a potential issue?
Which of the following is not a principal component of a simple closed-cycle compression refrigeration system?
What is one of the primary functions of Acts related to power engineering?
What is the symptom of a refrigeration system when the compressor loses oil due to leaking joints or fittings on the crankcase?
What is a potential outcome of inadequate maintenance of fans and blowers in a heating system?
If the warm air supply temperature exceeds 38°C (100°F) compared to the return air temperature, what could this indicate?
Which of the following is considered a flammability characteristic?
What is the primary advantage of re-circulating hot water systems?
Where should the boiler certificate of inspection be placed?
How do you calculate the percent increase of a spring that stretches from 12 cm to 15 cm?
When air temperature is lowered while moisture content remains constant, what happens to relative humidity?
What type of compressor is classified as a centrifugal compressor?
Which ASME code contains recommended guidelines for the care of power boilers?
In a building heating system, where does the condensate in the condensate receiver tank come from?
For which purpose are operating controls on heating boilers primarily designed?
What is the primary function of a blowers driving belt in a ventilation system?
In a microturbine-driven alternator, which components are synchronized by a converter to meet electrical demand?
Excess theoretical air can improve what aspect of combustion?
To safely open the drum vents after the fires are out, the boiler pressure should be approximately within what range?
How many terminals does a 2-pole or double pole switch have for connection to wires?
What is the role of dehumidification in an air conditioning system?
What is the primary cause of heating boiler failure?
The regulations governing power engineering are more often overseen by a/an ___________ than by parliament.
Which of the following is NOT a reason for cooling the air in pneumatic systems?
If a stored pressure fire extinguisher cartridge is how much below the stamped weight, should it be replaced?
Which type of compressor is most suitable for large-scale industrial applications?
What role does superheat play in a refrigeration system?
The Steel plate heating boiler is classified as a _____ pass boiler.
Which aspect of multiple heating boiler plants is typically emphasized for operational efficiency?
What is one of the primary controls in a refrigerating system that regulates the liquid refrigerant flow?
What are boiler fittings?
What are the two adjustable variables contained in an On-Off pressure controller?
What is the advantage of using fins on a bare tube evaporator coil?
Which feature allows for more uniform temperature distribution in a forced warm air heating system?
How does one design of a refrigeration compressor cylinder unloader function?
Older radiators were made of cast iron and joined using which method?
What distinguishes 'regulations' from 'Acts' in terms of modifications?
Why is Babbitt material suitable for lining bearings?
What is the common air velocity through a viscous filter?
At what temperature should the blowdown valves be opened to drain the boiler?
What is forced up and down in the cylinder of a reciprocating compressor?
In which system is clean steam commonly used?
How is specific heat defined in relation to 1 kg of a substance?
What is one of the general classes of lubricants?
Which type of humidifier is frequently used for residential purposes?
What type of pumps are often used to assist condensate flow in large buildings?
What type of boiler is typically used for efficient heating in commercial applications?
Which advantage does a forced warm air heating system provide for air quality?
The "D" type boiler is constructed with _____ drums.
The pressure relief valve is typically installed on the boiler or reasonably close to the boiler outlet with:
Which type of emergency lighting is required by the Life Safety Code for means of egress in educational and institutional occupancies?
How can a percentage be converted into a fraction?
Which property should oils intended for heat transfer use possess?
Wall heaters can be classified as what type of heater?
Which of the following is a key component of the WHMIS system?
Where is the oil separator located in a compression refrigeration system?
What is one of the main weaknesses of a gas turbine system?
How does a water closet flush tank operate?
What is one key feature of packaged watertube boilers?
What is a common characteristic of low temperature catalytic heaters?
Which of the following is NOT a possible cause of low water level in a boiler?
What is the role of the thermostatic expansion valve in a refrigeration system?
How can you express R in terms of E and I based on the equation I = E / R?
Which of the below is a benefit of using a forced warm air heating system?
What does ASME stand for in relation to power engineering?
What is the hydrostatic testing interval for carbon dioxide fire extinguishers?
What is the unit of energy in the International System of Units (SI)?
Which of the following types of fuel are generally used to fire a large steam generating unit?
What type of material is used for packing rings to reduce leakage around the pump shaft?
What is a disadvantage of the metal sheath electric infrared heating element?
What is the primary function of firetubes in steel plate heating boilers?
What is power defined as?
What must all valves be properly identified with?
Which materials are favored for wear rings due to their smooth wear characteristics?

Get the latest from Examzify