5th Class Power Engineering Practice Exam

Using the correct viscosity oil in machinery is essential primarily to ensure proper lubrication. Viscosity refers to the thickness or flow characteristics of the oil, which directly affects its ability to form a lubricating film between moving parts. If the viscosity is too low, the oil may not provide adequate protection against wear and tear, allowing metal-to-metal contact that can lead to significant damage. Conversely, if the viscosity is too high, it can cause excessive resistance to movement, leading to increased temperatures and potential overheating of the machinery components.

Proper lubrication aids in the smooth functioning of machinery, reduces friction, and helps in dissipating heat, which enhances the overall lifespan and efficiency of the equipment. In summary, maintaining the correct viscosity ensures that the machinery operates within its designed parameters, achieving optimal performance and reliability.