Lubricants and Coolants MCQ - Machinist(Set-1) with Answers

Lubricants and Coolants MCQ - Machinist(Set-1) with Answers

11) Which one of the following frictions occurs in an un-lubricated journal bearing ?

Answer is:

Dry friction

Explanation:

Dry friction occurs in an un-lubricated journal bearing.

Which one of the following frictions occurs in an un-lubricated journal bearing ?

12) In which one of the following materials no cutting oil is used when drilling ?

Answer is:

Grey cast iron

Explanation:

In Grey cast iron materials no cutting oil is used when drilling.

In which one of the following materials no cutting oil is used when drilling ?

13) The effective cutting of steel with hand hacksaw, which one of the following coolants is suitable ?

Answer is:

Cutting oil

Explanation:

when cutting steel with hand hacksaw, cutting oil is used .

14) Which among the following is NOT a purpose of greasing ?

Answer is:

Carry away the heat produced in bearing

15) Which one of the following is NOT the property of a good lubricant ?

Answer is:

Becomes thicker after prolonged use