1) Arrange the below operations in operator controlled machine tool in correct order.
(A) Operator
(B) Process planing
(C) Machine tool
(D) Component drawing
(E) Completed component
a. (A) – (D) – (B) – (C) – (E)
b. (D) – (B) – (C) – (A) – (E)
c. (B) – (D) – (C) – (A) – (E)
d. (D) – (B) – (A) – (C) – (E)
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2) The device, fed to the control unit of NC machine tool which sends the position command signals to sideway transmission elements of the machine, is called as
a. controller
b. tape
c. feedback unit
d. none of the above
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3) In NC (Numerical Control) machine tool, the position feedback package is connected between
a. control unit and programmer
b. programmer and machine tool
c. control unit and machine tool
d. programmer and process planning
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4) Which of the following options is correct for the control unit and panel of NC (Numerical Control) and CNC (Computer Numerical Control) machine tools?
a. The control unit of NC machine tool works in ON-line mode and the control unit of CNC machine tool works in batch processing mode
b. The control unit of NC machine tool works in batch processing mode and the control unit of CNC machine tool works in ON-line mode
c. The control units of both NC and CNC machines work in ON-line mode
d. The control units of both NC and CNC machines work in batch processing mode
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Answer
Explanation
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ANSWER: The control unit of NC machine tool works in batch processing mode and the control unit of CNC machine tool works in ON-line mode
Explanation:
No explanation is available for this question!
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5) In CNC machine tool, the part program entered into the computer memory
a. can be used only once
b. can be used again and again
c. can be used again but it has to be modified every time
d. cannot say
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6) Jigs and fixtures are
a. machining tools
b. precision tools
c. both a. and b.
d. none of the above
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7) A device, in which a component is held and located for a specific operation and bushes are integrated that guide the tool, is called as
a. jig
b. fixture
c. both a. and b.
d. none of the above
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8) Fixtures are used in connection with
a. drilling operation
b. reaming operation
c. tapping operation
d. milling operation
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9) How jigs are in terms of weight compared to fixtures?
a. Jigs are lighter than fixtures
b. Jigs are heavier than fixtures
c. Jigs are equal in weight to fixtures for same operation
d. cannot say
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10) Which of the following sentences are true for jigs and fixtures?
1. Using jigs and fixture produce work rapidly
2. High speed, feed and depth of cut can be used in machining with the help of jigs and fixtures
3. Jigs and fixture cannot be used in machining of complex and heavy components
a. (1) and (2)
b. (2) and (3)
c. (1) and (3)
d. All of the (1), (2) and (3)
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11) Which type of drilling operation is shown in below diagram?
a. Boring
b. Counterboring
c. Sinking
d. Countersinking
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12) Calculate the cutting speed of drilling operation when diameter of drill is 10 mm and rotational speed of drill is 200 r.p.m.
a. 6.283 m/min
b. 3.142 m/min
c. 8.362 m/min
d. 10.216 m/min
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13) Which operation can correct hole location, size or alignment of the hole which is already drilled in workpiece?
a. Boring
b. Rimming
c. Both a. and b
d. None of the above
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14) How is the workpiece fed of in down milling process?
a. In down milling process, the workpiece is fed in the same direction as that of cutter's tangential velocity
b. In down milling process, the workpiece is fed in the opposite direction as that of cutter's tangential velocity
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Answer
Explanation
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ANSWER: In down milling process, the workpiece is fed in the same direction as that of cutter's tangential velocity
Explanation:
No explanation is available for this question!
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15) The thickness of layer material removed in one pass of workpiece under the cutter is called as
a. single pass cut
b. depth of cut
c. width of cut
d. face cut
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16) The performance of grinding wheel is evaluated in terms of grinding ratio (G) which is given by the ratio of
a. the volume of material required to the volume of wheel wear
b. the volume of wheel wear to the volume of material required
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Answer
Explanation
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ANSWER: the volume of material required to the volume of wheel wear
Explanation:
No explanation is available for this question!
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17) Which type of grinding wheel is shown in below diagram?
a. Dish wheel
b. Cup wheel
c. Saucer wheel
d. Cylinder wheel
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18) Which of the following is/are example/s of honing operation?
a. Roller bearing races
b. Diesel engine cylinder bore
c. Hub holes in gears of gear boxes
d. All of the above
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19) The productivity of honing operation is
a. less than the productivity of lapping operation
b. more than the productivity of lapping operation
c. equal to the productivity of lapping operation for the same workpiece
d. unpredictable
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Answer
Explanation
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ANSWER: more than the productivity of lapping operation
Explanation:
No explanation is available for this question!
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20) When the the finishing is more important than the dimension then
a. honing operation is carried out for finishing
b. lapping operation is carried out for finishing
c. grinding operation is carried out for finishing
d. all of the above
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Answer
Explanation
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ANSWER: lapping operation is carried out for finishing
Explanation:
No explanation is available for this question!
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