Question

Of the following statements choose the correct statement :
A) Grease is used to reduce friction in the bicycle chain.
B) Ball bearings are used to reduce friction in a fan.
C) Oil can be used to increase friction in a car engine.
D) Talc can be used to reduce friction in a carrom board.

• A. A, B, D
• B. A, C, D
• C. B, C, D
• D. A, B, C, D

Answer 1

The correct option is A

A, B, D

Grease, Oil and Talc are lubricants used to reduce friction between moving parts. Ball bearings is a device used to reduce friction between rotating parts. Since option C negates this property, it is incorrect.