Q35
The operation of making a cone-shaped enlargement of the end of a hole is known as
A.
Counter-sinking
AnswerB.
Counter-boring
C.
Trepanning
D.
Spot facing
Answer: Option A
Solution
Answer: Option A
Solution:
Counter sinking is used to enlarge the upper part of (a cavity), especially by chamfering, to receive the cone-shaped head of a screw, bolt.
The operation of making a cone-shaped enlargement of the end of a hole is known as Counter-sinking