OB4

Question 1

A universal horizontal milling machine differs from a plain horizontal milling machine in that it has

A knee
A table swivel
More power
No arbor support

Answer 1

B

Question 2

The spindle of a horizontal milling machine is on the

Base
Column
Knee
Saddle

Answer 2

B

Question 3

On a horizontal milling machine, the table and saddle are supported by the

Base
Column
Knee
Overarm

Answer 3

C

Question 4

A vertical milling attachment is bolted directly to the milling machine’s

Arbor
Base
Column
Knee

Answer 4

C

Question 5

The purpose of a vertical milling attachment is to enable you to mount cutters

Directly to the spindle
In a vertical position
On a stub arbor
All of the above

Answer 5

B

Question 6

A milling machines spindle speed is always expressed in

in/min
mph
rpm
sfpm

Answer 6

C

Question 7

Cutter speed is the rate at which a particular tooth

Makes a cut 0.01 deep and 1 in. long
Passes over the workpiece surface
Rotates in the spindle
Will cease to cut material

Answer 7

B

Question 8

In order to compute spindle speed, you must have the

Conversion of feet to inches
Cutter dia
Cutter speed
All of the above

Answer 8

D

Question 9

Round shafts to be milled are usually mounted in a

Adapter
Swivel base vise
Universal vise
V-block

Answer 9

D

Question 10

The graduations on the swivel base of a milling machine vise allow you to

Accurately align the workpiece at any angle
Hold the work more securely
Mount the vise quickly
Set a precise depth of cut

Answer 10

A

Question 11

A slab milling cutter is designed to make ___ cuts

Angular
Heavy
Light
Narrow

Answer 11

B

Question 12

A right hand helix means that the

Cutter cannot make a left hand cut
Cutter rotation is clockwise
Cutter rotation is counterclockwise
Cutter teeth spiral to the right

Answer 12

D

Question 13

A left hand cut means the

Cutter has a left hand helix
Cutter has a right hand helix
Feed is from left to right
Feed is from right to left

Answer 13

C

Question 14

A Style B arbor has a

Bearing sleeve
Knurled end
Pilot
V-notch

Answer 14

A

Question 15

A Style B arbor is held in the spindle with a

Clamp
Collet
Drawbar
Strap

Answer 15

C

Question 16

You should never tighten the arbor nut unless the arbor support is in position because

The arbor can be sprung
The arbor can lock the column
The arbor nut cant be tightened without the support
The overarm can be forced out of line

Answer 16

A

Question 17

According to the formula rpm=sfpmx4 what is the spindle speed in rpm if the cutter speed is 70sfpm and dia is 3”

52.5
70
93.33
210

Answer 17

C

Question 18

Which of the following is not a factor in making a rough cut efficiently?

Depth of cut
Length of workpiece
Machine table feed rate
Spindle speed

Answer 18

B

Question 19

If you stop the automatic feed before a cut is finished, always

Engage the rapid reverse
Loosen the arbor nut
Raise the table
Stop the cutter rotation

Answer 19

D

Question 20

In order to increase surface quality on a finish slab milling cut, lower the feed rate and

Change the cutter
Lower the spindle speed
Maintain the spindle speed
Raise the spindle speed

Answer 20

C

Question 21

The first machining step in milling a T-slot is to mill

A 45 degree angle in the groove
A chamfer at the top of the slot
A slot or groove in the workpiece
The T in the slot

Answer 21

C

Question 22

In a horizontal setup, what kind of cutter is used to mill the vertical slot?

End mill
Face mill
Shell end mill
Side mill

Answer 22

D

Question 23

To align the cutter exactly over the top of the intended slot, you must subtract half the cutter width from the

Distance across the end of the workpiece
Distance between the slot and the end of the workpiece
Distance between the slots centerline and the workpiece edge
Width of the workpiece

Answer 23

C

Question 24

You can fit a T-slot cutter into the horizontal spindle by using a

Adapter
Chuck
Clamp
Live center

Answer 24

A

Question 25

When you are completing a T-slot with the T-slot cutter held in the horizontal spindle, you must Double the spindle speed Set the workpiece on its side Use the extra coolant Use the arbor supports

Answer 25

B

Question 26

To bevel the edge of a workpiece in a horizontal setup, what kind of cutter is used? End mill Face mill Single angle mill Slab mill

Answer 26

C

Question 27

What kind of cutter is use to mill a slot in a vertical setup End mill Face mill Half side mill Side mill

Answer 27

A

Question 28

When milling a T slot with a vertical setup as compared with a horizontal setup, you should use A heavier T slot cutter A longer T slot cutter A shorter T slot cutter The same T slot cutter

Answer 28

D

Question 29

To angle mill a workpiece in a vertical setup, what kind of cutter would you use? End mill Face mill Side mill Slab mill

Answer 29

A

Question 30

The difference between milling a T slot and milling a dovetail is the difference between the Cutter shapes Machine used Workpiece materials All of the above

Answer 30

A

Question 31

In straddle milling, the distance between the cuts is controlled by the Spacers between the cutters Table travel Transverse adjustment Vertical feed

Answer 31

A

Question 32

In straddle milling, there must be adequate clearance between the workpiece and the Column Knee Spacers Spindle

Answer 32

C

Question 33

The greatest advantage in a straddle milling is that you Achieve a deeper cut Get a better finished surface Get greater power Save time

Answer 33

D

Question 34

In straddle milling, in order to balance the thrust load on the arbor, half the side milling cutters should have Diameters of less than two inches More than 3 in of distance between them Opposite helixes Staggered teeth

Answer 34

C

Question 35

The cutter used to mill an angle stop must be wide enough to Cut the full depth of the step Cut the full length of the step Cut the wide end of the step Straddle mill the step

Answer 35

C

Question 36

Which of the following is the most precise method of finding out how wide the end of an angled step measures? Compass and scale Scale drawing Surface gauge Trigonometry

Answer 36

D

Question 37

When you select a cutter for an angled step, you should always select the smallest cutter that will cut the wide end of the step because it Cuts deeper Gives a finer cut Is less expensive Lasts longer

Answer 37

C

Question 38

When milling a step on a workpiece that is mounted at an angle, you must advance the crossfeed an amount that is ___ the desired width of the step (measured on the workpiece) Less than Equal to More than Not related to

Answer 38

A

Question 39

What kind of an arbor is used for shell end mill? Style A Style B Style C Style D

Answer 39

C

Question 40

Why should a face mill be wider than the area to be cut? To achieve higher cutting speeds To avoid surface lines To get a deeper cut To get faster feed rates

Answer 40

B

Question 41

If you cut a keyseat for square key using an arbor mounted side milling cutter, you will produce A woodruff keyseat An offset keyseat Feathered ends on the keyseat Square ends on the keyseat

Answer 41

C

Question 42

Woodruff keyseats and keys are Eccentric Rarely used Standardized Threaded

Answer 42

C

Question 43

The last two digits on a Woodruff number show the cutter diameter in Degrees Eights of an inch Metric divisions SFPM

Answer 43

B

Question 44

What would you use to make a plunge cut? Four Flouted end mill Side mill Two fluted end mill Woodruff keyseat cutter

Answer 44

C

Question 45

A plunge cut allows you to use the cutter in the same way you would use a Boring tool Drill bit Side mill Slab mill

Answer 45

B

Question 46

The best way to mill squares on round work without using a dividing head is to use ___ milling End Face Side Straddle

Answer 46

D

Question 47

To find out the largest square that can be cut from a rounded shaft, multiply the diameter by 0.223 0.314 0.333 0.707

Answer 47

D

Question 48

If the space between two straddle cutters is slightly too narrow, you can increase it by installing A wide spacer Narrower cutters Shims Wider cutters

Answer 48

C

Question 49

The procedures for milling a tang are basically the same as the procedures for milling a Keyway Single flat Square All of the above

Answer 49

C

Question 50

A single flat surface on a round shaft is usually machined with a Four fluted end mill Plain milling cutter Single angle cutter Two fluted end mill

Answer 50

B