DRILLING - Quiz

1) How the size of drill bit is measured?

Between flutes Between the lands Between web Neck diameter

2) What is the helix angle of general purpose drill?

59 Degree 118 Degree 27.5 Degree 8 Degree to 12 Degree

3) Which part of a reamer is designed for the removal of chips?

Face Flute Heel Cutting edge

4) What is the purpose of type S twist drill?

Used for hard material Used for high carbon steel Used for soft and tough material Used for normal low carbon steel

5) What is the reason for rough holes in drilling?

Unequal point thinning Drill point not in centre Clearance angle is incorrect Drill cutting edges are not sharp