OB1 Flashcards
(50 cards)
1
Q
Straight turning is performed by machining a workpiece to the same diameter along the Entire length of the workpiece Included width of a relief notch Prescribed length of a shoulder Specified radius of a fillet
A
A
2
Q
A groove or undercut at the diameter change to ensure grinding up to the square face of a large diameter is a Fillet Relief notch Shoulder Taper
A
B
3
Q
The most common method for turning tapers larger than 3in./ft is the \_\_\_ method Compound rest Cutoff Tailstock setover Taper attachment
A
A
4
Q
When facing a workpiece that is short, you should mount it Chuck Collet Mandrel Any of the above
A
D
5
Q
When facing work between centers, use a half-center in order to
provide clearance for cutting tool
provide space for mounting the tool
provide travel space for compound rest
provide working clearance for the bent tail lathe dog
A
A
6
Q
To make sure that bored and counter-bored holes are concentric Always use the power feed Always use the same cutting tool Always use the same lathe setup for both Never use single point tools
A
C
7
Q
Bore large and irregularly shaped workpieces in a Bench lathe Horizontal boring mil Medium to large sized lathe Production type turret lathe
A
B
8
Q
Which of the following methods can be used for boring tapers? Compound rest method Cutoff method Steady rest method Tailstock setover method
A
A
9
Q
The most accurate method for boring tapers on a lathe is the Compound rest method Cutoff method Tailstock setover method Taper attachment method
A
D
10
Q
The shape of screw threads cut on a lathe is determined by the Depth of cut Lathe feed setting Pitch of the thread Profile of the cutting tool tip
A
D
11
Q
the most common way to drill in a lathe is to mount the drill Between centers In a chuck In the headstock spindle In the tailstock quill
A
D
12
Q
When drilling long holes or working with bulky or cumbersome workpieces, you should mount the drill Between centers In the headstock In the Tailstock In the tool holder
A
B
13
Q
The most accurate way to drill in a lathe is
Drill rotating and workpiece rotating
Drill stationary and workpiece stationary
Drill stationary with workpiece rotating
Workpiece stationary with drill rotating
A
C
14
Q
The machine most often used for drilling jobs in which a high degree of accuracy is not needed is Engine lathe Horizontal boring mill Sensitive drill press Upright drill press with power feed
A
C
15
Q
Use a radial drill press when the workpiece
Is too large or bulky for an upright drill press
Is too small for an upright drill press
Is very small and intricate
Needs more accuracy than supplied by a sensitive drill press
A
A
16
Q
The major difference between spot facing and counterboring is spot facing Is done before drilling Is never used on castings Remove less metal Remove more metal
A
C
17
Q
Boring is done in a drill press by installing a boring bar in a Boring head Boring mount Crotch center Tool post
A
A
18
Q
Use drill jigs when
A lathe is the only machine available
A sensitive drill press is the only machine available
The hole is drilled only once
The same hole is to be repeated a number of times
A
D
19
Q
Reaming can be done By hand In a drill press In a lathe All of the above
A
D
20
Q
Honing is done with the use of A facing tool A special drill bit An end mill Very fine abrasive stones
A
D
21
Q
Machining a groove in the surface of a flat piece of metal is an example of \_\_\_ milling Plain Side Slab Straddle
A
B
22
Q
Machining angular, concave and convex cuts into metal workpieces are example of \_\_\_ milling Face Irregular Profile Side
A
C
23
Q
Face milling cutters 6in. or less in dia. are called End mills Facing Cutters Shell end mills Staggered tooth cutters
A
C
24
Q
Machining keyways for a standard Woodruff key is a common example of Face milling Planing Shaping Slotting
A
Slotting
25
The primary advantage of shaping as opposed to milling is
A shaper tool can get into places that a milling cutter cannot
Single pointed cutting tools are less costly than milling cutters
The single pointed cutting tool is easily made
All of the above
D
26
```
A slotting machine is actually the same thing as
Upright drill press
Vertical Boring mill
Vertical shaper
Vertical shaping lathe
```
C
27
```
The cutting action of a broaching machine is done by
Circular passes
Pushing or pulling horizontally
Rotating the cutter
Vertical drilling action
```
B
28
The cutting teeth of a broach
Are higher in the middle than at either end
Are the same height from one end of the broach to the other
Decrease in height from the end entering to the end leaving the workpiece
Increase in height from the end entering to the end leaving the workpiece
D
29
```
Surface grinding is done in order to
Produce extremely close tolerances
Produce very fine finishes
Remove metal that is too hard for normal machining
All of the above
```
D
30
```
The main advantage of using a vertical grinding machine is that
A greater area can be done in less time
A smoother finish is obtained
It is less costly than other process
Less skill is involved
```
A
31
The accuracy required to hold close tolerances
Affects the choice of machine
Affects the function of the final workpiece
Increases the skill involved in machining
All of the above
D
32
```
Angular dimensions are measured in
Degrees and minutes
Inches and feet
Meters and centimeters
Pounds and ounces
```
A
33
Care must be taken when working with angular tolerances because
Only a minus tolerance is given
Only a plus tolerance is given
The spread becomes larger as distance increases away from the center
Tolerance fluctuations cannot be determined
C
34
```
In a unilateral system of specifying tolerances
Both plus or minus is given
Neither plus or minus is given
Only a plus or minus is given
All of the above
```
C
35
Tolerance stackup must be calculated when working with
Multiple cutting tools on different surfaces
Multiple dimensions on one workpiece
Multiple workpieces on one machine
One workpiece on different machines
B
36
```
A rough cut removes excess material and allows for
Dimensional runout
The finish cut
Tolerance stackup
All of the above
```
B
37
```
When taking a rough cut, you must take the finishing operations into account or
Special fixtures may be damaged
The finished workpiece may be undersized
The machine will overheat
Undue tool wear will result
```
B
38
```
During a finish cut
A new machine is always required
A small amount of material is removed
Enough material is left for one or two more cuts
Large amount removed
```
B
39
The type of surface finish made by a machine tool is influenced by
Feed marks left by the cutting tool
The way chips are formed by the tool
Vibrations between the workpiece and the tool
All of the above
D
40
```
A surface averaging instrument measures
Average roughness of surface texture
Depth of cut needed for finishing
Feed rate for a given cutting tool
Rake angle in a single point cutting tool
```
A
41
```
The ease with which metal can be removed from a workpiece is referred to as
Cutting tool strength
Machineability
Machine variables
Workpiece variables
```
B
42
```
Brittle metals like cast iron form chips that are
Continuous
Continuous with a built edge
Discontinuous
Irregular
```
C
43
```
When selecting cutting fluids
Amount of fluid
Point of application
type
All of the above
```
D
44
```
Solid lubricants are mainly used on
Hacksaw and bandsaw
High speed drill bits
Sinle point cutting tools
Very large milling cutters
```
A
45
```
After a list of operations has been made for a specific job the next step is to
Check dim. and tolerances
Consider cutter cost
Decide on the machine
Make the best operational sequence
```
D
46
```
A careful study and analysis of the total job is crucial to
cutter life
machineability
machine efficiency
workpiece variables
```
C
47
For maximum working efficiency always try to
move the work to different machines to gain accuracy
use the same cutter for all operations
use the same machine for as many operations as possible
work as fast as safety will allow
C
48
Specially designed fixtures and attachments can be justified when
A fast wearing part is made on a regular basis
Emergency parts must be made to keep a production line running
Spare parts must be made for obsolete equipment
All of the above
D
49
```
Always try to select a machine which is
One of the newest machines in the shop
One of the older machines in the shop
Slightly oversized for the job
Slightly undersized for the job
```
C
50
When choosing a machine for a given operation
Make sure the machine has more than enough power
Stay away from the outer limits of a machines capacity
Use the machine designed for the specific operation
All of the above
D
