Drilling

Question 0

Cutting speed refers to?

Answer 0

Peripheral speed

Question 1

What abbreviation is used to express the feed rate on a drill press?

Answer 1

ipr- Inches per revolution.

Question 2

Which variable is the most important when determining spindle speed?

Answer 2

Diameter of the drill

Question 3

To remove a tapered shank twist drill from the drill spindle, use a?

Answer 3

Drill drift

Question 4

Which type of machine tap will push the chips out ahead of the tap?

Answer 4

Spiral point (gun) tap

Question 5

Which type of machine tap will pull the chips up out of hole?

Answer 5

Spiral fluted tap

Question 6

Which type of machine tap does not clear the chips and may jam and break?

Answer 6

Straight fluted tap

Question 7

Upright drill presses have a power _________ feed.

Answer 7

Power “table” feed

Question 8

What type of drill press is used for drilling large work?

Answer 8

Radial arm drill press

Question 9

The drilling machine that allows quick lowering and raising of the head is the?

Answer 9

Radial arm

Question 10

The size of a sensitive drill press is generally stated by?

Answer 10

The distance from the Center of chuck to the column

Question 11

The operation of opening a hole to an accurate size and good surface finish is the definition for?

Answer 11

Reaming

Question 12

When a tapping operation is performed under power in a drill press a __________ is used.

Answer 12

Tapping attachment

Question 13

A sensitive drill press has _______ feed only

Answer 13

Hand

Question 14

A general-purpose drill for drilling most metals has an included-point angle of?

Answer 14

118 degrees

Question 15

The three main parts of a drill bit are?

Answer 15

Point, shank and body

Question 16

When counterboring, the speed selected should be approximately __________ that used for drilling.

Answer 16

1/4

Question 17

The thickness of the web of a twist drill:

Answer 17

Increases from point to shank

Question 18

Name three things flutes of a drill do?

Answer 18

• admit cutting fluid
• form the cutting edges
• allow chips to exit

Question 19

A #27 drill, as compared with a #26 drill is?

Answer 19

Smaller in diameter

Question 20

The twist drill set that contains drill sizes that range from 0.234” to 0.413” in diameter is the:

Answer 20

Letter set

Question 21

The size of a twist drill should be measured over the:

Answer 21

Margins

Question 22

When drilling large holes you should start by?

Answer 22

Drilling a pilot hole

Question 23

Excessive drilling speed will cause what to the drill bit?

Answer 23

The edges of the margins and chisel point to break down

Question 24

The included point angle of a countersunk hole for most flathead screws is

Answer 24

82 degrees

Question 25

What variable is most important when determining spindle speed?

Answer 25

Diameter of the drill

Question 26

The lip relief (clearance) angle on a drill should be?

Answer 26

8-12 degrees