OB6

Question 1

Which of the following can only be cut on a power hacksaw or horizontal bandsaw?
angle irons
profiles
round stock
wheel puller bodies

Answer 1

C

Question 2

The major advantage of a bandsaw over a hacksaw is that the bandsaw
does not require the use of cutting fluid
has a programmed drive control
is more portable
makes no wasted motion

Answer 2

D

Question 3

When you install the band in a horizontal bandsaw, the teeth must point
downward, to the right
downward, to the left
up, to the left
up, to the right

Answer 3

A

Question 4

When you set up a light duty horizontal bandsaw, how will you set the bandspeed?
change the drive belt position
flip the selector switch on the motor housing
push the speedset button
turn the belt tension knob

Answer 4

A

Question 5

When preparing to make a cut with a horizontal bandsaw, which of the following is the final step you will take?
adjust the cutting fluid flow
move the head control view to RELEASE
reposition the workpiece
turn on the bandsaw

Answer 5

B

Question 6

If the vertical bandsaw you use requires solid one piece guide inserts, you must select a pair of upper and lower inserts to match the
depth and dia. of the cut
size of the workpiece
width and thickness of the band
width of the feed machine

Answer 6

C

Question 7

When you set the blade of a vertical bandsaw, make sure the teeth in your right hand point
downward
to the left
to the right
upward

Answer 7

A

Question 8

When you approach the end of a cut made on the vertical bandsaw, you should
operate the drive wheel manually
reduce the feed pressure
shift into a lower gear
stop the saw, finish the cut with jogging the start

Answer 8

B

Question 9

Before you use the vertical bandsaw, an essential safety requirement is to make sure that
all guards are in place
all of your jewelry has been de-magnetized
barriers are set up around
the cutting fluid is flowing

Answer 9

A

Question 10

After you cut apart the band of a vertical bandsaw, how should you clean the band ends before rewelding them
clean the with solvent
sand them
wipe them with light oil
wipe them with a clean dry rag

Answer 10

B

Question 11

Which of the following is a major feature of the sensitive drill press?
it can drill almost any size hole
it can handle very large workpieces
its feed is directly under operator control
its head can reach any part of the table

Answer 11

C

Question 12

Before you change from one tapered shank drill to another, make sure to
clean the chips from the shank and spindle
lubricate the spindle shank
remove the old bit with a file
sand any nicks or burrs off the chuck

Answer 12

A

Question 13

Which type of drilling machine can be used for boring operations?
gear head drill press
radial drill
sensitive press
turret type drill press

Answer 13

B

Question 14

What is a good rule to follow in planning the order of machining steps?
never change the setup between drilling and conterboring
never change the setup between drilling and spotfacing
plan the order to include as few changes in setup as possible
use the most powerful machine that will do the work

Answer 14

C

Question 15

When securing a workpiece on the drill press table , before you tighten the vise jaws, you should
insert strips of paper between the vise and workpiece
tap the parallels lightly to align them
tape the work piece lightly to seat it
use shims or soft metal rods to seat the workpiece

Answer 15

C

Question 16

For holes over .5 in dia., you should use either a ___ or ___
gear head drill press, radial drill
radial drill, manual drill
sensitive press, radial press
turret type drill, sensitive press

Answer 16

A

Question 17

You must drill a .5in hole in a workpiece of hard cast iron at 70 sfpm. whats a good spindle speed?
160 rpm
280 rpm
320 rpm
560 rpm

Answer 17

D

Question 18

You back a large diameter drill out of thick stock periodically and clear out chips to avoid
breaking a drill
changing lubricants
excessive rpm of the drive motor
spontaneous ignition of the chips

Answer 18

A

Question 19

If your drills cutting edge chips as you begin your project, its most likely because
dull drill bit
excessively high feed rate
excessively high spindle speed
inadequate number of flutes

Answer 19

B

Question 20

When you counterbore a hole, you should use a boring bit with a pilot whose dia. is
1/32in. under existing dia.
10/64in. larger than the screw head
one-half the outside dia. of the bit
the same as the existing hole

Answer 20

D

Question 21

The most distinctive feature of a typical precision vise for shaping operations is its
ability to tilt
automatic feed stop
built in t bolts
swivel base

Answer 21

A

Question 22

Wherever you leave a horizontal shaper, even if the project you are working on is not completed, you must
clear off the worktable
lubricate the machine
remove the cutting tool
vertically realign the clapper box

Answer 22

C

Question 23

To help ensure safe operation, which of the following should you do before you operate a shaper?
idle the clutch a few minutes to warm up the machine
set the stroke length to the shortest stroke
set the stroke position as far forward as possible
set the transmission on the lowest speed

Answer 23

D

Question 24

Which of the following must you do before mounting a workpiece in the shaper vise?
adjust the clapper box
dial in the cutting speed
indicate-in the vise or worktable
mount the roughing cutter in the tool post

Answer 24

C

Question 25

When you mount a block shaped workpiece in a shaper vise, the last step in seating the workpiece is to indicate-in the vise with a dial indicator insert strips of paper on the parallels make sure vise jaws move freely tap the work lightly with a soft mallet

Answer 25

D

Question 26

When preparing to use the shaper, which of the following should you do first? adjust the clapper box adjust the worktable position clamp the table with clamping nuts set the length of the stroke

Answer 26

D

Question 27

Calculate the stoke rate, with a 5-in. long workpiece of cold work tool steel (40sfpm) 25.0 strokes per minute 46.6 strokes per minute 78.3 strokes per minute 92.5 strokes per minute

Answer 27

B

Question 28

What is the actual overtravel made by the ram in one complete cycle of its stroke when the machine is set up according to guidelines? 1/2in 3/4in 1in 1 1/4in

Answer 28

B

Question 29

An absolutely essential safety precaution to use with shapers is to wear crepe soled shoes wear eye protection wear gloves work in pairs

Answer 29

B

Question 30

Which of the following operations is especially well suited for a horizontal shaper, and is usually not possible to do on any other machine? cutting a slot or a keyway facing a flat surface milling a flat surface polishing an interior surface

Answer 30

A

Question 31

All of the following can be finished with a surface grinder except a flat surface on a rectangular workpiece the shoulders on a cylindrical workpiece the taper on a drive key two surfaces that meet at an angle grater than 90 degrees

Answer 31

B

Question 32

An essential requirement for beginning a grinding project is to align the table with a dial indicator allow enough surplus material for grinding ensure an ample flow of clean coolant mount a fresh point on the wheel dresser

Answer 32

B

Question 33

When you dress and true a grinding wheel, start by lowering the wheel so that the diamond lightly touches the high point left edge low point right edge

Answer 33

A

Question 34

When grinding a long rectangular workpiece, your first step is to grind the basic flat surface ends square with the long sides included angles short sides parallel with each other

Answer 34

A

Question 35

When setting up a workpiece on the surface grinder, which of the following procedures should you do last? lower the wheel for a rough cut position the wheel start the automatic table feed turn on the coolant

Answer 35

D

Question 36

What is the recommended allowance for finishing cuts in general purpose grinding? .0002 to .0005 .0005 to .001 .0008 to .0080 .0010 to .0100

Answer 36

B

Question 37

To achieve a cutting speed of 4500 sfpm with a 9-in. grinding wheel, the wheel must rotate at about 160 rpm 405rpm 500rpm 1900 rpm

Answer 37

D

Question 38

In order to hold a workpiece securely between centers on a cylindrical grinder, you must fasten it with clamping screws magnetize the end chucks tighten the spindle drawbolt use pressure from the footstock

Answer 38

D

Question 39

Which calculation will give you the approximate rotation speed (rpm) for a workpiece on a cylindrical grinder? sfpm x workpiece dia. sfpm x 2/ workpiece dia. sfpm x 3 / workpiece dia. sfpm x 4/ workpiece dia.

Answer 39

D

Question 40

When the wheel is wider than the raised surface to be ground, the procedure to use is bumping the shoulder directional grinding plunge grinding traverse grinding

Answer 40

C

Question 41

One feature common to all types of horizontal boring mills is the end support headstock column saddle on which the table is mounted stationary table

Answer 41

B

Question 42

An optional component that enables you to bore from several different directions without changing the setup is the continuous feed head line boring bar power drawbolt rotary table

Answer 42

D

Question 43

An advantage of the stub boring bar over a line boring bar is that it allows you to bore large holes decreases vibration has a long tool life increases the reach

Answer 43

B

Question 44

When using a light weight boring bar, you need a cutter with a large back rake angle/ large side rake angle large back rake angle/ small side rake angle small back rake angle/ large side rake angle small back rake angle/ small side rake angle

Answer 44

A

Question 45

When using a dial indicator to measure alignment on finished surfaces, correct alignment is achieved when the dial reading gradually decreases gradually increases remains constant remains within a range of .010 in.

Answer 45

C

Question 46

When you align a workpiece having a pre-machined hole, and using a dial indicator mounted in the spindle, what you are really checking for is absolute dia. concentricity depth smoothness

Answer 46

B

Question 47

When setting up a line boring operation, measurements are usually made from the layout lines to the adjustable tool side boring bar end support headstock

Answer 47

B

Question 48

If you cannot withdraw the boring bar to check the bore dia. you may need to use a depth gauge inside calipers inside mic transfer template

Answer 48

B

Question 49

What tool is most practical to use when you must rough bore an especially long work area? adjustable head facing head multiple point boring tool single point boring tool

Answer 49

C

Question 50

Which operation on a long boring mill requires the use of a power cross side tool head? facing flycutting multiple point boring slotting

Answer 50

A