Q34
The operation of smoothing and squaring the surface around a hole is known as
A.
Counter-sinking
B.
Counter-boring
C.
Trepanning
D.
Spot facing
AnswerAnswer: Option D
Solution
Answer: Option D
Solution:
The most common application of spot facing (spot facing) is facing the area around a bolt hole where the bolt's head will sit, which is often done by cutting a shallow counter bore, just deep enough "to clean up"—that is, only enough material is removed to get down past any irregularity and thus make the surface flat.