QuestionJuly 24, 2025

Serious injury can result when work spins on a drill (''merry-go-round'') This can be prevented by __ securing the drill to the worktable using a drill-holding device with a chuck mounting the work solidly on the drilling machine using an indexable-insert drill Question 24 Countersinking is a machining operation that __ prepares the hole to receive a flat-head screw prepares the hole to receive a socket- or fillister-head screw machines a circular spot on a rough surface for a bolt head or nut machines a square shoulder to ensure maximum clamping action

Serious injury can result when work spins on a drill (''merry-go-round'') This can be prevented by __ securing the drill to the worktable using a drill-holding device with a chuck mounting the work solidly on the drilling machine using an indexable-insert drill Question 24 Countersinking is a machining operation that __ prepares the hole to receive a flat-head screw prepares the hole to receive a socket- or fillister-head screw machines a circular spot on a rough surface for a bolt head or nut machines a square shoulder to ensure maximum clamping action
Serious injury can result when work spins on a drill (''merry-go-round'') This can be prevented by __
securing the drill to the worktable
using a drill-holding device with a chuck
mounting the work solidly on the drilling machine
using an indexable-insert drill
Question 24
Countersinking is a machining operation that __
prepares the hole to receive a flat-head screw
prepares the hole to receive a socket- or fillister-head screw
machines a circular spot on a rough surface for a bolt head or nut
machines a square shoulder to ensure maximum clamping action

Solution
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Answer

prepares the hole to receive a flat-head screw Explanation 1. Identify the purpose of countersinking Countersinking is used to create a conical hole that allows flat-head screws to sit flush with or below the surface.

Explanation

1. Identify the purpose of countersinking<br /> Countersinking is used to create a conical hole that allows flat-head screws to sit flush with or below the surface.
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