RRB JE 2015-27-09-2015-3 RRB Question Paper

RRB JE 2015 Question Papers

RRB JE 2015-27-09-2015-3 RRB Questions

11.
Extrusion is the process of
A.
Producing holes by arc
B.
Metal shaping on presses
C.
Pushing the heated billet of metal through the orifice
D.
Welding two dissimilar metals
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ANSWER :
C. Pushing the heated billet of metal through the orifice
12.
A third flask sometimes used between cope and drag is called
A.
Middle
B.
Core
C.
Fillet
D.
Cheek
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ANSWER :
D. Cheek
13.
Gears in mass production is produced by
A.
Milling
B.
Shaping
C.
Hobbing
D.
Forming
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ANSWER :
C. Hobbing
14.
Scab is a
A.
Sand casting defect
B.
Machining defect
C.
Welding defect
D.
Forging defect
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ANSWER :
A. Sand casting defect
15.
The following symbol depicts [Image - refer original]
A.
Relay
B.
Lightning arrester
C.
Fuse
D.
Circuit Breaker
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ANSWER :
C. Fuse
16.
Thermal relay works on the principle of
A.
Heating effect of current
B.
Flow of current in the circuit
C.
Ohm's Law
D.
Electromagnetic Induction
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ANSWER :
A. Heating effect of current
17.
Which of the following is not a part of a DC machine?
A.
Stabilizer
B.
Stator
C.
Commutator
D.
Armature
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ANSWER :
A. Stabilizer
18.
The type of transformer used in a Stabilizer is
A.
Power Transformer
B.
Auto Transformer
C.
Current Transformer
D.
Distribution Transformer
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ANSWER :
B. Auto Transformer
19.
Safety relay used in a transformer acts as
A.
Temperature Gauge
B.
Explosion Vent
C.
Buchholz Relay
D.
Earthing Point
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ANSWER :
C. Buchholz Relay
20.
The value of slip of an induction motor at synchronous speed is
A.
zero
B.
infinite
C.
unity
D.
cannot be determined
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ANSWER :
A. zero