NOCTI Cabinetmaking Practice Exam

Counterboring with a drill is desirable when preparing holes to receive screws that will be plugged.

To Create Decorative Holes To Receive Screws That Will Be Plugged To Remove Material Quickly To Align The Drill With The Pilot

Correct Answer:

To Receive Screws That Will Be Plugged

Explanation:

When you want to hide a fastener, counterboring is used to create a recessed space that will later be covered by a plug. The counterbore drill cuts a cylindrical, flat-bottomed hole that is larger in diameter than the screw shank but only shallow, so the screw head sits below the surface. After driving the screw, a matching wooden plug is glued into that counterbored hole and then flush-sanded. The plug fills the recess and hides the screw, leaving a clean, continuous surface. This approach isn’t about decorative holes, rapid material removal, or drilling alignment with a pilot—those are different tasks. The purpose here is to provide a concealed mounting hole that can be plugged for a seamless appearance.

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