Mod 7

What is the most common twist drill bit?

• Carbide drill bit
• Titanium drill bit
• Wood drill bit
• Jobber HSS

What must be done when using a countersink drill bit if you are unsure of the depth?

• Use on a test piece before starting

• Close your eyes and hope for the best
• Use a different drill bit
• Start the drilling off slowly in case it goes too deep

What angle of countersink cutter is most common?

• 80 degrees

• 60 degrees
• 75 degrees
• 100 degrees

What can be used to control the depth when carrying out countersinking work?

• Micro stop

• Auto stop

• Mega stop

• A guarded stop

Where is a tap used to cut threads?

• On a round bar

• Who cares

• Outside a hole

• Inside a hole

What is a die used to cut external threads on to?

• Any piece of metal

• A square bar

• Inside of a hole

• Rod or cylindrical bar

At what angle must die’s be held at?

• 45 degrees
• 30 degrees
• 60 degrees
• 90 degrees

What controls the speed on a pillar drill?

• Pulley belt

• Gears

• How fast you move it up and down

• A foot pedal

What will be a sign that your pillar drill is at a good speed when it enters the metal?

• Continuous swarf coming out

• Drill bit getting stuck and not moving
• Swarf flying everywhere

• Smoke and signs of heat generation

A work piece must be ………… before drilling?

• clamped or secured
• painted blue
• covered in oil
• left loose