Lathe Machine MCQ- 3

1) Which one of the following tool angle is provided to avoid rubbing of the body of the tool with the work piece ?

Rake angle

Helix angle

Clearance angle

None of the above

Correct Answer- (C)

2) Which one of the following is used only for finishing and maintaining correct form of thread?

Tap

Threading tool

Threading chaser

Tipped tool

Correct Answer- (C)

3) The negative rake angle is generally provided on the tool made of …………..

High speed tool

Tool steel

Tungsten carbide

High carbon steel

Correct Answer- (C)

4) The chip breaker on a lathe tool is essential when

Turning soft material

Turning ductile materials and to break the chips

Turning cast iron

Turning hardened materials

Correct Answer- (B)

5) What effective change will occur to the tool geometry if the cutting tool is set below the centre height on lathe?

Front clearance angle increases

Front clearance angle decreases

Front clearance angle remains the same

Front clearance angle becomes zero

Correct Answer- (A)

6) A tool, which is used to enlarge a previously drilled hole is known as

Turning tool

Boring tool

Facing tool

Form tool

Correct Answer- (B)

7) Inserted HSS tool bits are more useful for the …………………. operation

Boring

External threading

Internal threading

All the above

Correct Answer- (D)

8) Which one of the following materials is used for manufacturing centre drills ?

Cast iron

Mild steel

High speed steel

Cast steel

Correct Answer- (C)

9) Which among the following statements in respect of chasers is correct?

Chaser is a single point cutting tool

Cutting threads by a chaser is slower process than that by a single point tool

Cutting threads by chaser gives better finish

The same chaser can be used for cutting any pitch of thread irrespective of the type of chaser used

Correct Answer- (C)

10) Which among the following statements in respect of the lathe cutting tools is correct?

Red hotness temperature is higher for high carbon steel tool than that of carbide tool

The property of tool chipping off with vibration is more for cemented carbide tools than that of HSS tools

Ceramic tool has more resistance to shock as compared to HSS tool

HSS tool can work at more spindle speed and feed than cemented carbide tool

Correct Answer- (B)

11) In the parting off tool which angle will help the tool to penetrate into the work without rubbing at the sides?

Top rake angle

Front clearance angle

Back clearance angle

Side clearance angle

Correct Answer- (C)

12) Which one of the following angles in the lathe tool helps for easy flow of chips?

Front clearance angle

Top rake angle

Back clearance angle

Side clearance angle

Correct Answer- (B)

13) Which among the following statements in respect of chip breakers is correct?

Chip breakers are essential for breaking the long continuous chips into small pieces

Chip breakers are necessary to break the chips to protect the finished work surfaces

Chip breakers are provided to curl and break the chips

All the above

Correct Answer- (D)

14) Helix angle is found on

threading tool

feed rod of lathe

taper turning attachment

threaded workpiece

Correct Answer- (D)

15) The width of the tool used to cut 10 mm pitch square thread is

2.5 mm

10 mm

7.5 mm

5 mm

Correct Answer- (D)

16) The included angle of the countersinking portion of a centre drill of type ‘B’ used for protecting the centre hole is

75°

900°

100°

120°

Correct Answer- (D)

17) Which one of the following factors will NOT influence the selection of the cutting speed?

Operation to be performed

Workpiece material

Tool material

Diameter of the workpiece

Correct Answer- (D)

18) Which one of the following angles of rough turning tool, depends upon the feed rate chosen?

Side rake angle

Front clearance angle

Top rake angle

Side clearance angle

Correct Answer- (D)

19) The size of the centre drill is selected on the basis of the

diameter of the workpiece

material of the workpiece

operation to be performed on the workpiece

length of the workpiece

Correct Answer- (D)

20) Taps are surface treated to

prevent them from getting corroded

improve the wear resistance property

improve the appearance

be used only on automatic threading machines

Correct Answer- (B)