OB3

Question 1

Three jaw chuck open and closes

at the tailstock
in unison
only when mounted on a lathe
separately

Answer 1

B

Question 2

Four jaw chuck jaws

are designed to grasp large or odd shaped work
can be reversed
operate separately
all of the above

Answer 2

D

Question 3

The quickest and most convenient chuck to set up a lathe is the

Arbor
Four jaw
Mandrel
Three jaw

Answer 3

D

Question 4

The size of a chuck is designated by its

Circumference
Diameter
Radius
Width

Answer 4

B

Question 5

Before mounting a chuck, always place a board across the

Apron
Spindle
Tool post
Ways

Answer 5

D

Question 6

When you install a chuck on the spindle, you should never use

A key
A wrench
Power from the lathe
Your hands

Answer 6

C

Question 7

A chuck mounted workpiece must be centered, with the work axis parallel to the lathes

Centerline
Cross slide
Guide bar
All of the above

Answer 7

A

Question 8

An exact reference for centering oddly shaped workpieces in a chuck is the

Dead center
Guide bar
Live center
Tool post

Answer 8

A

Question 9

The type of work that can be held in a collet chuck is limited to

Large workpieces
Oddly shaped work
Small dia. work
Work with rough outside dia.

Answer 9

C

Question 10

A mandrel is mounted in the lathe

Between centers
In a collet
In a 4 jaw
In a 3 jaw

Answer 10

A

Question 11

Facing a workpiece gives is square ends and a

Countersink
Reference surface
Rounded edges
All of the above

Answer 11

B

Question 12

Which angle is the most important on a facing tool

Back radius
Bake rake
Nose radius
Side rake

Answer 12

D

Question 13

When facing, you should set the tool on the workpiece’s

Centerline
Circumference
Horizontal plane
Perpendicular axis

Answer 13

A

Question 14

When facing a large area on a workpiece, use the

Apron handwheel
Automatic feed
Manual feed
Reverse speed

Answer 14

B

Question 15

The rough cut is intended to remove material from the workpiece

In small amounts
Quickly
Slowly
Smoothly

Answer 15

B

Question 16

The roughing cut should leave enough material for a

Facing cut
Finishing cut
Grinding operation
Trial rough cut

Answer 16

B

Question 17

A rough turning tool does not make a good

Finish cut
Heavy cut
Trial cut
All of the above

Answer 17

A

Question 18

The proper use of cutting fluids allows you to increase

Cutting speed
Depth of cut
Time savings
All of the above

Answer 18

D

Question 19

The characteristic that makes a finishing tool differ from a roughing tool is its

Decreased side rake
Extended shank
Increased back rake
Rounded point

Answer 19

D

Question 20

A trial finish is just like a trial rough cut except that you are looking primarily for

Accidental tapering
Depth of cut
Surface finish quality
Tool chatter

Answer 20

C

Question 21

Boring a hole in a workpiece makes the hole larger and

Faces it
Threads it
Trues it
Turns it

Answer 21

C

Question 22

A bored hole and the circular path in which a tool or workpiece is rotating are always

Concentric
Horizontal
Parallel
Vertical

Answer 22

A

Question 23

The end clearance on a boring tool bit prevents the

Heel from rubbing
Post from binding
Shank from bending
Workpiece from shifting

Answer 23

A

Question 24

Within practical limits, always use a boring bar with the

Greatest length possible
Largest dia possible
Longest overhang possible
Smallest radius possible

Answer 24

B

Question 25

The type of corner produced at the end of a bored hole is determined by the Boring bar dia Cutting speed Cutting tool profile Lathe design

Answer 25

C

Question 26

When you bore a hole, you should offset the compound rest to an angle of ___ degrees 5 29 30 60

Answer 26

D

Question 27

During boring operations, a chip buildup should be cleaned out After completing the entire boring operation Before the tool is installed Only after counterboring Only when the lathe is completely stopped

Answer 27

D

Question 28

Forming a recess at the top of an existing hole is called Counterboring Facing Knurling Turning

Answer 28

A

Question 29

The counterbore must be concentric with the Bore Cross slide centerline Tool post Tool profile

Answer 29

A

Question 30

Counterboring procedures are the same as those for Turning Facing Boring Knurling

Answer 30

C

Question 31

Machining a recess between two sets of internal threads separates the threads and Helps alignment Prevents chatter Provides chip clearance All of the above

Answer 31

C

Question 32

The dia of a hole to be threaded must equal the threads Lead radius Major dia Minor dia Pitch

Answer 32

C

Question 33

When threading a bored hole, be sure that you allow for A 60 degree angle of thread A counterbore A taper Tool clearance

Answer 33

D

Question 34

A thread cutting tool must be ground to the particular Boring bar form Lathe design Recess width Thread form

Answer 34

D

Question 35

For right hand thread cutting, the compound rest must be rotated to the left ___ degrees 5 29 45 60

Answer 35

B

Question 36

How many different methods are there of boring a taper on a lathe? 4 1 3 2

Answer 36

D

Question 37

When you use the compound rest method to bore a taper, you must rotate the compound to an angle equal to one half the included angle one third the included angle the included angle twice the included angle

Answer 37

A

Question 38

When using the compound rest method for boring a taper, you must set the tool post and tool holder parallel to the Compound rest centerline Lathe centerline Workpiece All of the above

Answer 38

A

Question 39

Of all the methods available to machine a taper on a lathe, which of the following is the most accurate? Compound rest method Reversed chuck method Tailstock offset method Taper attachment method

Answer 39

D

Question 40

The telescopic taper attachment differs from the plain taper attachment in which of the following ways? A cross-feed screw telescopes internally It clamps to the tailstock Its guide bar is stationary The workpiece must be held between centers

Answer 40

A

Question 41

A faceplate provides a reference surface that is perpendicular to the lathe's Apron Headstock Spindle axis Tool post

Answer 41

C

Question 42

When truing a faceplate, you should select a ___ tool Broad nosed Rough facing Rough turning Threading

Answer 42

A

Question 43

Large workpieces that pose mounting problems in a chuck can be mounted on a faceplate with Clamps Drivers Faceplate jaws V-blocks

Answer 43

C

Question 44

Faceplate clamps are inserted into The cored hole The faceplate slots The live center The workpiece

Answer 44

B

Question 45

To prevent a workpiece from shifting backwards on a faceplate, you should use a Clamps Counterweight Driver Mandrel

Answer 45

C

Question 46

Workpieces that cannot be held against the vertical surface of a faceplate should be mounted on A mandrel An angle plate The apron The ways

Answer 46

B

Question 47

You can offset the weight of an angle plate by using a Chuck Counterweight Driver V-block

Answer 47

B

Question 48

Each half of the clamp on a V-block angle plate has Set screws Straps V-shaped jaws A key way

Answer 48

C

Question 49

A specialized mandrel for machining eccentric circular areas has more than one set of Center holes Clamps Counterweights Drivers

Answer 49

A

Question 50

When you bore very large workpieces, such as motor housings, on lathe, you should mount them In a special chuck On the carriage In a collet On a mandrel

Answer 50

B