Lathe Machine MCQ- 3 || ITI Fitter Trade Theory
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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)
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