LATHE MACHINE MCQ 2

1) Which one of the following is used to hold cylindrical rough casting for turning?

Three-jaw chuck

Four-jaw chuck

Collet chuck

Magnetic chuck

Correct Answer (C)

2) Which one of the following centres is suitable while cutting taper by set over method?

Plain centre

Half centre

Ball centre

Revolving centre

Correct Answer (B)

3) Which one of the following is used to hold the workpiece for machining diameter concentric to its hole / bore?

Face plate

Mandrel

Three-jaw chuck

Four-jaw chuck

Correct Answer (D)

4) Which among the following centres is suitable when workpiece held between centres is to be turnned at high speed?

Ball centre

Half centre

Pipe centre

Revolving centre

Correct Answer (D)

5) The included angle of live centre nose is

30°

45°

60°

90°

Correct Answer (C)

6) A lathe half centre is used

To support the workpiece always

To turn long workpiece

Because it is easy to lubricate the workpiece

To face the workpiece upto the end of the centre hole

Correct Answer (D)

7) Dead centre, as compared with the live centre, bears or resists

No friction

Equal friction

Less friction

More friction

Correct Answer (D)

8) The size of three-jaw chuck is specified by

The size of each jaw

The thickness of each jaw

The diameter of the body of the chuck

Width of the body of the chuck

Correct Answer (C)

9) A follower steady consists of

One pad

Two pads

Three pads

Four pads

Correct Answer (B)

10) A follower steady is fixed on the

Tailstock

Bed

Saddle

Headstock

Correct Answer (C)

11) The taper provided in the nose of the tailstock barrel is

Morse taper

Jarno taper

Brown and Sharpe taper

Metric taper

Correct Answer (A)

12) An irregularly shaped workpiece is turned on a lathe. Which one of the following work holding accessories is used?

Three-jaw chuck

Two-jaw chuck

Driving plate

Faceplate

Correct Answer (D)

13) Which taper is used on spindle nose of the lathe headstock?

Jarno taper

Brown and Shame taper

Pin taper

Morse taper

Correct Answer (D)

14) What is the advantage of tailstock spindle having left-handed threads?

Avoid advancement of barrel when rotated clockwise

Ensure that the barrel advances with clockwise movement of hand wheel

Reduce the tendency for excessive movement of the barrel

Avoid jamming of spindle and hand wheel

Correct Answer (B)

15) Which among the following is NOT the feature of tailstock?

It holds the job

Drills and reamers can be mounted on it

Dead centre is mounted on its spindle

It can be used for taper turning by offset method

Correct Answer (A)

16) Which one of the following tool posts is easy for setting the tool centre height of the tool in a lathe?

Open side tool post

Single screw tool post

Four-way tool post

Universal tool post

Correct Answer (D)

17) An angular workpiece is to be faced. It should be mounted

In a three-jaw chuck

In a collet

Between centres

On a face plate

Correct Answer (D)

18) Scroll and gear mechanism is employed in

Three-jaw chuck

Four-jaw chuck

Magnetic chuck

Collet chuck

Correct Answer (A)

19) Which among the following materials is used for steady rest pads?

Mild steel

Lead

Brass

Aluminium

Correct Answer (C)

20) Which among the following statements in respect of fixed steady is NOT correct?

when setting its two lower pads are made to just touch the surface of the job first

It must be trued before the pads to bear on the job

Skinning is done on the job before it is set with the job

It is fixed to the carriage of the lathe

Correct Answer (D)

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