The ____ is used to enlarge the end of a machined hole to a specific diameter and depth.
A) counterdrill
B) spotface
C) countersink
D) counterbore
E) none of the above

Question

Quizplus · Accepted Answer

A counterbore is used to enlarge the end of a machined hole to a specific diameter and depth. A counterdrill is used to drill a pilot hole for a screw. A spotface is used to create a flat area on a surface for a fastener. A countersink is used to create a conical-shaped hole for a screw head to sit flush with the surface. Therefore, the correct answer is D) counterbore.

The ____ Is Used to Enlarge the End of a Machined