Question

lubricants are used in machine parts
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Answer 1

Answer:

Lubricants are used in machine parts to decrease friction between them . It is done because

i) to increase the output of the machine

ii) to stop it from producing more heat

Ex. Oil,grease,ball bearings ,etc.

Answer 2

Lubricants are used to reduce the friction between the parts of the machines which are connected together. Oil is the example of the lubricant. Lubricants makes the machines efficient.