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Which one of the following can also act ...

Which one of the following can also act as a lubricant in the machines?

A

Iron fillings

B

Polish on machines

C

Flow of waler through the machine

D

Flow of compressed and purifie air.

Text Solution

Verified by Experts

The correct Answer is:
D
In the machines, the flow of compressed and purified air lowers the friction, hence is acts as a lubricant.
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