OB2 Flashcards
(49 cards)
1
Q
Always check the lathe bed to make sure it is Attached Level Straight All of the above
A
B
2
Q
You should always cut off bar stock for machining After it has been rough turned Slightly longer than needed Slightly shorter than needed With a band saw
A
B
3
Q
Longer workpieces should be Mounted between centers Mounted in a chuck Mounted on a faceplate Any of the above
A
A
4
Q
When installing a faceplate Screw it on by hand Screw it on using lathes power Tap it in place with a small mallet Use the faceplate tool attachment
A
A
5
Q
Always select a lathe dog
At least as long as the workpiece
Not larger than necessary to accept the workpiece
Slightly larger than necessary to accept work
That will bottom out in the faceplate
A
B
6
Q
When facing, use a half center to Allow clearance for the cutting tool Cut back on friction on the dead center Help turn very long workpieces Turn at very high speeds
A
A
7
Q
Be sure the tail of the lathe dog Bottoms out in the faceplate Does not extend to the faceplate Does not sit on the bottom of the faceplate Extends beyond the headstock
A
C
8
Q
Make sure the cutting tool Does not hang out excessively from tool holder Does not protrude from the tool holder Extends well beyond tool holder Is always at a 90 angle from workpiece
A
A
9
Q
The cutting speed and feed on a lathe should always be
Calculated to obtain the best possible finish
In accordance with published tables from manufactures
In balance
All of the above
A
D
10
Q
When moving the cutter into the workpiece during facing Always lightly strike the dead center Be careful not to strike dead center Do not loosen the carriage nut Never use the hand cross feed
A
B
11
Q
Always remember that your depth of cut Reduce the overall dia by one half Reduce the dia by exactly the amount Reduce the dia by twice the amount Reduce the dia by three times the amount
A
C
12
Q
Always use a right hand tool when Cutting left to right Cutting right to left Make a standard finishing cut Shouldering
A
B
13
Q
Depending on the hand of cut, the cutting tool point should be \_\_\_ degrees toward the headstock or tailstock 2 to 3 4 to 5 6 to 7 8 to9
A
B
14
Q
In rough turning the cutter point should be positioned \_\_\_ the centerline 4 degree below 5 degree above 5 degree below directly on
A
B
15
Q
With a constant depth of cut
An increase in speed does not affect feed
An increase in speed requires a decrease feed
An increase in speed requires an increase in feed
An increase in speed will double the feed
A
B
16
Q
The most accurate way to test if adjustments are needed is A finish cut A rough cut A trial cut All of the above
A
C
17
Q
When reversing work end for end between centers
Do not use the lathe dog on the reversed operation
Increase the feed rate
Increase the speed rate
Protect the machined surface from the lathe dog
A
D
18
Q
Always take your finishing cut At twice the speed as the rough cut In the opposite direction of the rough cut In the same direction as the rough cut With the same tool as the rough cut
A
C
19
Q
When aligning the cutting tool for a finishing cut
Set the cutting tool above the centerline of work
Set the cutting tool below the centerline of work
Set the micrometer collar at the desired depth of cut
Set the micrometer collar at the desired dia of work
A
A
20
Q
A trial cut should be about 1/16 in. 1/4 in. 3/4 in. 1 in.
A
B
21
Q
When a shoulder is to be turned close to the end of the workpiece use a scale and
Compass to measure its location
Dye to measure its location
Hermaphrodite caliper to measure location
Micrometer to measure its location
A
C
22
Q
The bent leg of hermaphrodite caliper is placed against the \_\_\_ of the workpiece Faced end Middle Outside dia Radius
A
A
23
Q
In order to lay off shoulder lengths more accurately when making more than one identical use a File Finishing tool Parting tool Roughing tool
A
C
24
Q
Filleted shoulders are turned with a \_\_\_ cutting tool Round nosed Square noosed Straight nosed V-tipped
A
A
25
```
Different size fillets are made by changing
The angle of cutter feed
The degree of tailstock offset
The nose radius on the cutting
To a different sized fillet attachment
```
C
26
Square corners on a shoulder are needed when
A chamfer is specified
Other machine parts will be mounted against them
The shoulder follows a taper
The shoulder needs added reinforcement
B
27
```
Undercuts always ensure
Chamfered edges
Filleted shoulders
Rounded shoulders
Square Corners
```
D
28
```
Knurling operation always
Deform the workpiece surface
Smooth the workpiece surface
True up a workpiece surface
All of the above
```
A
29
```
A 21 pitch knurling tool will produce a ___ grade knurl
Coarse
Fine
Medium
Extra fine
```
C
30
On a finished work surface, filing is usually done to
Bring the workpiece to finished dimensions
Form a diamond pattern in the workpiece
Remove tool marks and other irregularities
All of the above
C
31
```
The split nut assembly is used only when
Chamfering
Cutting threads
Knurling
Shouldering
```
B
32
Never engage the split nut assembly
Unless another feed mechanism is in operation
When another automatic feed mechanism is in operation
When the trial cut is being made
When working between centers
B
33
```
The distance from a point on one thread to the same point on the next thread parallel to the screw axis is the
Lead
Pitch
Travel
Width
```
B
34
```
The distance which a point on one thread travels during one revolution of the screw is the
Lead
Pitch
Travel
Width
```
A
35
```
When threading long slender workpieces they should always be
Held in a chuck
Held in a mandrel
Supported in a collet
Supported with a follower or steady rest
```
D
36
```
American National thread angles are always
40 degree
55 degree
60 degree
69 degree
```
C
37
```
When cutting American National threads, the compound rest should always be set at an angle of
19 degree
29 degree
37 degree
42 degree
```
B
38
```
The part of a lathe which can perform the same functions as a thread stop is the
Bell crank
Lead screw
Live center
Micrometer collar
```
D
39
```
How many divisions are marked on a thread dial indicator
1
2
4
8
```
D
40
In cutting a right hand thread the cutting tool is always fed
At twice the angle of the tailstock setover
From left to right
From right to left
In both directions
C
41
```
A 5/8 in./ft. taper often used for twist drills, reamers, end mills, and lathe centers is the
American Standard Machine Taper
Brown & Sharpe Taper
Jarno Taper
Morse Taper
```
D
42
```
A taper whose calculation depends on its assigned number in the form of a numerator over a constant denominator of 8, 10, or 2 is a
American Standard Taper
Brown & Sharpe Taper
Jarno Taper
Morse Taper
```
C
43
Basic formula for calculating a taper is
large dia-small dia
_______________
length
44
```
The taper turning method which requires work to be removed from the lathe for the setup is the ___ method
Compound rest
Plain taper attachment
Tailstock set over
Telescopic taper attachment
```
C
45
```
The amount of inward and outward feed on the lathes compound rest when using the taper attachment is controlled by the
Guide bar
Lead screw
Tailstock hand wheel
Tool post
```
A
46
```
A plain taper attachment requires you to
Disconnect the crossfeed screw
Disconnect the taper attachment from the lathe bed
Misalign the dead center
Swivel the compound rest
```
A
47
```
The key to using the compound rest method for turning a taper is the fact that the compound rest
Detaches
Moves up and down
Swivels
All of the above
```
C
48
When using the compound rest method for turning tapers, you will need to work with angular dimensions because
Taper dimensions are always given in angles
Tapers are figured in metrics
The base of the rest is graduated in degrees
The compound rest swivels on half angles
C
49
Along with using a series of trial cuts, the most accurate way to obtain angular settings for taper turning is the
Compass and gauge method
Dial test indicator and vernier bevel protractor method
Hand cross feed and micrometer collar method
Surface averaging instrument method
B
