Question

Commonly, we lubricate the hinges of the doors to reduce the friction which helps us in smooth movement of the door. Even after lubricating, we still find some resistance. What can be the reason behind this?

• A. Low quality of lubricant
• B. Amount of lubrication might not be appropriate.
• C. Lubrication cannot eliminate friction.
• D. Lubrication has absolutely no role in reducing friction.

Answer 1

The correct option is C Lubrication cannot eliminate friction.

There are multiple methods to reduce friction, including lubrication.
While all the methods help in reducing friction, but cannot eliminate it.