RRB JE 2015-26-09-2015-1 RRB Question Paper

RRB JE 2015 Question Papers

RRB JE 2015-26-09-2015-1 RRB Questions

1.
Which of the following is an extensive property?
A.
Pressure
B.
Heat capacity
C.
Temperature
D.
Specific volume
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ANSWER :
B. Heat capacity
2.
Kelvin Planck's law deals with
A.
Conservation of work
B.
Conservation of heat
C.
Conservation of heat into work
D.
Conservation of work into heat
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ANSWER :
C. Conservation of heat into work
3.
In which of the following mechanisms, is heat conducted in liquid and gas
A.
Lattice vibration
B.
Transportation of free electrons
C.
Collisions and diffusion
D.
No heat conducted
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ANSWER :
C. Collisions and diffusion
4.
An essential requirement for the transfer of heat from one body to another body is that
A.
Both bodies must be solids
B.
Both bodies must be in contact
C.
Temperatures of the two bodies must be different
D.
Temperatures of the two bodies must be same
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ANSWER :
C. Temperatures of the two bodies must be different
5.
The silencer of an internal combustion engine
A.
Reduces noise
B.
Decreases break specific fuel consumption
C.
Increases break specific fuel consumption
D.
Has no effect on its efficiency
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ANSWER :
A. Reduces noise
6.
Diesel engines are generally
A.
Quality governed
B.
Quantity governed
C.
Combination of quality and quantity governed
D.
Heat and mass governed
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ANSWER :
A. Quality governed
7.
The theoretically correct mixture of air and petrol is
A.
10:1
B.
15:1
C.
20:1
D.
25:1
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ANSWER :
B. 15:1
8.
Trepanning operation is used for
A.
Bevelling the edges
B.
Finishing the ends of job
C.
Cutting grooves
D.
Producing large holes
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ANSWER :
D. Producing large holes
9.
The gases used in TIG welding are
A.
Helium and neon
B.
Argon and helium
C.
Ozone and neon
D.
Carbon dioxide and nitrogen
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ANSWER :
B. Argon and helium
10.
In centrifugal casting, the cores are generally made of
A.
Wax
B.
Plastic
C.
Plaster of Paris
D.
Cores are not used
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ANSWER :
D. Cores are not used