RRB JE 2015-28-09-2015-3 RRB Question Paper

RRB JE 2015 Question Papers
RRB JE 2015-28-09-2015-3

RRB JE 2015-28-09-2015-3 RRB Questions

1.
The cyclic integral of (δQ - δW) for a process is
A.
Positive
B.
Negative
C.
Zero
D.
Unpredictable
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ANSWER :
C. Zero
2.
Triple point temperature of water is
A.
273 K
B.
273.14 K
C.
273.15 K
D.
273.16 K
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ANSWER :
D. 273.16 K
3.
Which of the following laws of thermodynamics is responsible for heat transfer
A.
Zeroth law of thermodynamics
B.
First law of thermodynamics
C.
Second law of thermodynamics
D.
Third law of thermodynamics
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ANSWER :
C. Second law of thermodynamics
4.
Which one of the following modes of heat transfer would take place predominantly from boiler furnace to water wall
A.
Convection
B.
Conduction
C.
Radiation
D.
Conduction and Convection
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ANSWER :
C. Radiation
5.
Compression ratio in case of SI engine is in the range of
A.
6-10
B.
10-15
C.
16-25
D.
25-40
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ANSWER :
A. 6-10
6.
Mean effective pressure of Otto cycle is
A.
Inversely proportional to pressure ratio
B.
Directly proportional to pressure ratio
C.
Does not depend on pressure ratio
D.
Proportional to square root of pressure ratio
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ANSWER :
B. Directly proportional to pressure ratio
7.
The choke is applied when the engine is
A.
Accelerating
B.
Hot
C.
Cold
D.
Idling
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ANSWER :
C. Cold
8.
In which of the following milling operations is the cutter rotated in the same direction as the travel of the work piece
A.
Up milling
B.
Down milling
C.
Face milling
D.
End milling
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ANSWER :
B. Down milling
9.
Dry and compressed air is used as cutting fluid for machining
A.
Steel
B.
Aluminium
C.
Cast iron
D.
Brass
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ANSWER :
C. Cast iron
10.
Spline-holes are machined by
A.
Milling
B.
Boring
C.
Drilling
D.
Broaching
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ANSWER :
D. Broaching
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