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MCQs 1: Which type of chips form while machining of brittle materials?

continuous chipsq discontinuous chips Built-up chips all of the above with some proportion
Answer Explanation

MCQs 2: Continuous chips are formed during metal cutting operation due to

ductile work materials large rake angle high cutting speed all of the above
Answer Explanation

MCQs 3: What is the reason for using unconventional or advanced machining processes?

Complex surfaces High accuracy and surface finish High strength alloys All of the above
Answer Explanation

MCQs 4: Which of the following is not a media of energy transfer on which the advanced machining processes are classified?

Reactive atmosphere Electrons Electrolyte Chemical ablation
Answer Explanation

MCQs 5: The spark gap in Electrical Discharge Machining (EDM) process is maintained such that

the gap voltage is around 99% of supply voltage the gap voltage is around 70% of supply voltage the gap voltage is around 50% of supply voltage the gap voltage is around 10% of supply voltage
Answer Explanation

MCQs 6: Which of the following materials is/are used for Electrical Discharge Machining (EDM) process?

Brass Copper Graphite All of the above
Answer Explanation

MCQs 7: In Electrical Discharge Machining (EDM) process the metal removal is carried out by

electrolysis melting and vaporisation fracture of work material due to impact of grains none of the above
Answer Explanation

MCQs 8: The cutting tool removes the metal from workpiece in the form of

solid blocks powder chips all of the above
Answer Explanation

MCQs 9: 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) – (D) – (B) – (C) – (E) (D) – (B) – (C) – (A) – (E) (B) – (D) – (C) – (A) – (E) (D) – (B) – (A) – (C) – (E)
Answer Explanation

MCQs 10: 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

controller tape feedback unit none of the above
Answer Explanation

MCQs 11: In NC (Numerical Control) machine tool, the position feedback package is connected between

control unit and programmer programmer and machine tool control unit and machine tool programmer and process planning
Answer Explanation

MCQs 12: Which of the following options is correct for the control unit and panel of NC (Numerical Control) and CNC (Computer Numerical Control) machine tools?

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 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 The control units of both NC and CNC machines work in ON-line mode The control units of both NC and CNC machines work in batch processing mode
Answer Explanation

MCQs 13: In CNC machine tool, the part program entered into the computer memory

can be used only once can be used again and again can be used again but it has to be modified every time cannot say
Answer Explanation

MCQs 14: Jigs and fixtures are

machining tools precision tools both a. and b. none of the above
Answer Explanation

MCQs 15: 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

jig fixture both a. and b. none of the above
Answer Explanation

MCQs 16: Fixtures are used in connection with

drilling operation reaming operation tapping operation milling operation
Answer Explanation

MCQs 17: How jigs are in terms of weight compared to fixtures?

Jigs are lighter than fixtures Jigs are heavier than fixtures Jigs are equal in weight to fixtures for same operation cannot say
Answer Explanation

MCQs 18: 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

(1) and (2) (2) and (3) (1) and (3) All of the (1), (2) and (3)
Answer Explanation

MCQs 19: Calculate the cutting speed of drilling operation when diameter of drill is 10 mm and rotational speed of drill is 200 r.p.m.

6.283 m/min 3.142 m/min 8.362 m/min 10.216 m/min
Answer Explanation

MCQs 20: Which operation can correct hole location, size or alignment of the hole which is already drilled in workpiece?

Boring Rim-ming Both a. and b None of the above
Answer Explanation

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