Quiz #2 - Lathes

Question 1

When filing on a lathe the file handle is held in:

1. the right hand
2. the left hand
3. either hand
4. no required

Answer 1

2. the left hand

Question 2

Lathes are commonly determined by:

1. the maximum distance between centres and the swing over the ways
2. the maximum shaft diameter it can accomodate
3. the length of the bed
4. horsepower at the cutting tool

Answer 2

1. the maximum distance between centres and the swing over the ways

Question 3

The feed directional lever is found on ___________, the feed revers lever is found on __________, and the feed engage lever is found on _________ of the lathe.

Answer 3

• Apron
• Head Stock
• Apron

Question 4

The four main parts of the carriage are:

1. Knee, saddle, cross-slide and tool post
2. Compound rest, saddle, apron and tool post
3. Compound rest, apron, cross-slide and tool post
4. Compound rest, apron, cross-slide and saddle

Answer 4

4. Compound rest, apron, cross-slide and saddle

Question 5

The tool post of a lathe is attached to:

1. the cross-slide
2. the saddle
3. the compound rest
4. the carriage

Answer 5

3. the compound rest

Question 6

The quick change gearbox on the engine lathe is used to:

1. change the speed of the lathe
2. change the feed rate of the lathe
3. change the back gear ratio
4. reverse the rotation of the headstock spindle

Answer 6

2. change the feed rate of the lathe

Question 7

The comound rest:

1. can cut a taper
2. has a graduated collar
3. can swivel 360 degrees
4. all of the above
5. none of the above

Answer 7

4. all of the above

Question 8

The tailstock has a two piece adjustable casting to permit:

1. oversize drilling
2. threading
3. taper turning
4. boring

Answer 8

3. taper turning

Question 9

The headstock and tailstock have a _____ taper. A center installed in the headstock is a _____ center, or installed in the tailstock is a _____ center.

Answer 9

• Morse
• Live
• Dead

Question 10

Explain two advantages of a four jaw chuck.

1. _________
2. _________

Answer 10

1. Can be used with irregular shaped work pieces.
2. More accurate when dialed in correctly.

Question 11

The follower rest is usually mounted on the:

1. bed
2. saddle
3. cross-slide
4. apron

Answer 11

2. saddle

Question 12

The thread chasing dial attaches to the __________ and indicates when to __________.

Answer 12

• Apron
• Close the split nut.

Question 13

When can the split nut be engaged with:

1. Odd numbered TPI’s: __________
2. Even numbered TPI’s: __________

Answer 13

1. Any main graduation
2. Any graduation

Question 14

The size of a tapered mandrel is usually stamped on the:

1. small end
2. large end
3. middle
4. not stamped

Answer 14

2. large end

Question 15

A taper mandrel has a taper per foot:

1. 7 degrees
2. .005 - .010 inches
3. .006 - .008 inches
4. not stamped

Answer 15

3. .006 - .008 inches

Question 16

Identify the four methods to produce a taper on a lathe:

1. __________
2. __________
3. __________
4. __________

“Dammit” is not an acceptable answer.

Answer 16

1. Tail stock offset
2. Taper attachment
3. Compiund rest
4. Form tool

Question 17

What is the lathe RPM set to when parallel turning a 2” diameter shaft with a cutting speed of 90 SFPM?

1. 180
2. 360
3. 90
4. 2

Answer 17

1. 180 RPM

Question 18

What units are used to specify lathe feed rates?

______________________________________

Answer 18

Inches or mm per revolution

Question 19

To turn a diameter on the end of a long square work piece, the work piece can be inserted into a __________ and supported in a steady rest.

1. spider
2. cathead
3. collet
4. chuck

Answer 19

2. cathead

Question 20

Never part off work held:

1. in a four jaw chuck
2. In a three jaw chuck
3. between centres
4. with a parting tool

Answer 20

3. between centres

Question 21

A right handed cutting tool cuts towards the tailstock.

1. True
2. False

Answer 21

True

Question 22

What is the purpose of boring on a lathe?

Answer 22

Accurately enlarging an existing hole to an exact size.

Question 23

When machine reaming holes up to 1/2” diameter, they are first drilled _____ under the finished size and holed over 1/2” are drilled _____ under the finished size. Lathe RPM is set to _____ and the feed is _____ of that used for drilling.

Answer 23

• 1/64
• 1/32
• 1/2
• twice

Question 24

When knurling on a lathe, the spindle speed and feed should be set to:

1. fast speed, high feed
2. slow speed, low feed
3. fast speed, low feed
4. slow speed, high feed

Answer 24

4. slow speed, high feed

Question 25

Three reasons why knurling is done on a workpiece: 1. for tool handles, to resist corrosion, and for appearance. 2. increase diameter, appearance, and provide a gripping surface. 3. to cover up errors of a part, for tool handles, and press fits. 4. none of the above

Answer 25

2. increase diameter, appearance, and provide a gripping surface.

Question 26

List three qualities of a good cutting fluid: 1. \_\_\_\_\_\_\_\_\_\_ 2. \_\_\_\_\_\_\_\_\_\_ 3. \_\_\_\_\_\_\_\_\_\_

Answer 26

* Lubricate * Resist Corrosion * Remain stable * Resist rancidity * Non-toxic * Transparent * Low viscosity * Non-flammable

Question 27

Cutting oils are best suited for __________ applications.

Answer 27

Finishing

Question 28

For a lathe toolbit to cut efficiently, the tool must be set to the centre of: 1. the bed axis 2. the chuck axis 3. the headstock axis 4. the spindle axis

Answer 28

4. the spindle axis

Question 29

When machining the length of the workpiece parallel to the axis of a lathe, it is called: 1. turning 2. chamfering 3. boring 4. facing

Answer 29

1. turning

Question 30

The steady rest is attached to the __________ and supports the work end of a long part. 1. bed 2. headstock 3. tailstock 4. saddle

Answer 30

1. bed

Question 31

When using the compound rest to cut a thread, the angle it should be set to is: 1. 29 degrees 2. 31 degrees 3. 27 degrees 4. 30 degrees

Answer 31

1. 29 degrees

Question 32

When the work piece must be held accurately, use a: 1. a drive plate 2. a universal chuck 3. a four jaw chuck 4. a three jaw chuck

Answer 32

3. a four jaw chuck

Question 33

A face plate is: 1. used for round work 2. used with couterweights 3. used for pipe work 4. drives a lathe dog

Answer 33

2. used with counterweights. ## Footnote A faceplate is a large disc that may be attached to the lathe spindle nose. It is similar to a drive plate, but is larger. Faceplates are used to hold oddly shaped workpieces that cannot be held in a chuck or between centres. A workpiece is clamped to the surface of the faceplate with a combination of bolts, straps, step blocks and angle plates, depending on the shape of the workpiece. There are slots and holes in the faceplate to accommodate the bolts. A faceplate setup must be balanced. If it is not, the lathe will vibrate, causing poor surface finish and loss of accuracy. It can even be very hazardous to the machine and operator if the spindle speed is set too high. Counterbalances must be used on a faceplate setup when balancing is required. When fastening a very heavy workpiece to a faceplate, it is easier to remove the faceplate from the lathe and set it on a horizontal surface. Then, set the workpiece on the faceplate and fasten it in place.

Question 34

A tapered pin has a _____ taper. 1. 1/8" TPF 2. .006-.008" TPF 3. 1/4" TPF 4. 5/8" TPF

Answer 34

3. 1/4" TPF