____ increases the diameter of a hole to a certain depth in order to allow a screw head or nut to be positioned flush with or below the workpiece surface.
A) Reaming
B) Tapping
C) Spotfacing
D) Counterboring

Question

Quizplus · Accepted Answer

Counterboring increases the diameter of a hole to a certain depth in order to allow a screw head or nut to be positioned flush with or below the workpiece surface. Reaming is used to improve the surface finish and size of an already drilled hole, tapping is used for threading holes, and spotfacing creates a smooth flat surface around a drilled hole.

____ Increases the Diameter of a Hole to a Certain