Which of the following is NOT a reason for using lubricants?

The choice indicating an increase in friction is not a reason for using lubricants. In fact, lubricants are specifically designed to reduce friction between surfaces in contact. By minimizing friction, lubricants help to enhance the performance and longevity of machinery and equipment, allowing moving parts to operate smoothly without excessive wear.

The purpose of lubricants extends beyond just reducing wear; they also play significant roles in preventing corrosion and managing temperatures. Lubricants form a protective film over metal surfaces, which helps to minimize direct contact, thus reducing wear and tear. They also provide a barrier against moisture and contaminants that could lead to corrosion.

Temperature control is another critical function, as lubricants help to dissipate heat generated by mechanical operations, ensuring that machinery operates within safe temperature limits. Therefore, it becomes clear that increasing friction contradicts the fundamental objectives of using lubricants, which aim to facilitate smoother operation and longer equipment life.