Question

which material is used as lubricant in machinery​

Answer 1

Answer:

Many different substances can be used to lubricate a surface. Oil and grease are the most common. Grease is composed of oil and a thickening agent to obtain its consistency, while the oil is what actually lubricates. Oils can be synthetic, vegetable or mineral-based as well as a combination of these.

Explanation:

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Answer 2

Answer:

solid lubricant like

graphite..