31) The material of twist drill is generally

Answer is:

H.S.S.

Drilling and Reaming MCQ with Answers

For more MCQ's Click Here

32) Which one of the following drilling machines is used for drilling holes where electricity is not available ?

Answer is:

Ratchet drilling machine

Explanation:

Where electricity is not available, Ratchet drilling machine is used for drilling holes.

Which one of the following drilling machines is used for drilling holes where electricity is not available ?

33) Which of the following reamers is particularly suitable for reaming holes having keyway grooves ?

Answer is:

Helical fluted reamer

Explanation:

Straight fluted reamers are useful for general reaming work. Helical fluted reamers are particularly suitable for reaming holes with keyway grooves or special lines cut into them. The helical flutes will bridge the gap and reduce binding and chattering.