RRB JE 2015-16-09-2015-3 RRB Question Paper

RRB JE 2015 Question Papers

RRB JE 2015-16-09-2015-3 RRB Questions

1.
For a simple closed system of constant composition, the difference between the heat and work interactions is identifiable as change in
A.
Enthalpy
B.
Entropy
C.
Flow energy
D.
Internal energy
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ANSWER :
D. Internal energy
2.
This process is one in which there is only work interaction between the system and the surroundings
A.
Diabatic process
B.
Adiabatic process
C.
Isothermal process
D.
Quasi-static process
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ANSWER :
B. Adiabatic process
3.
Isentropic flow is
A.
Irreversible adiabatic flow
B.
Reversible adiabatic flow
C.
Ideal fluid flow
D.
Frictionless reversible flow
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ANSWER :
B. Reversible adiabatic flow
4.
Fins are made as thin as possible to
A.
Reduce the total weight
B.
Accommodate more number of fins
C.
Increase the width for the same profile area
D.
Improve flow of coolant around the fin
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ANSWER :
B. Accommodate more number of fins
5.
Fraction of radiative energy leaving one surface that strikes the other surface is called
A.
Radiative flux
B.
Emissive power of the first surface
C.
View factor
D.
Re-radiation flux
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ANSWER :
C. View factor
6.
Which one of the following types of swirls is generated by a precombustion chamber in the diesel engine?
A.
Squish
B.
Compression swirl
C.
Induction swirl
D.
Combustion induced swirl
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ANSWER :
D. Combustion induced swirl
7.
In spark ignition engines knocking can be reduced by
A.
Increasing the compression ratio
B.
Increasing the cooling water temperature
C.
Retarding the spark advance
D.
Increasing the inlet air temperature
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ANSWER :
C. Retarding the spark advance
8.
Shell moulding can be used for
A.
Producing milling cutters
B.
Making gold ornaments
C.
Producing heavy and thick walled casting
D.
Producing thin casting
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ANSWER :
D. Producing thin casting
9.
A forging method for reducing the diameter of a bar, and in the process making it longer, is termed as
A.
Fullering
B.
Punching
C.
Upsetting
D.
Extruding
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ANSWER :
A. Fullering
10.
The process of removing the burrs or flash from a forged component in drop forging is called
A.
Swaging
B.
Perforating
C.
Trimming
D.
Fettling
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ANSWER :
C. Trimming