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Viscosity

Which one of ...

Question

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

A

Iron filling

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B

Polish on machines

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C

Flow of water through the machine

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D

Flow of compressed and purified air.

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Solution

The correct option is C Flow of compressed and purified air.
In the machines, the flow of compressed and purified air lowers the friction, hence it acts as a lubricant.

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