RRB JE 2015-27-09-2015-1 RRB Question Paper

RRB JE 2015 Question Papers

RRB JE 2015-27-09-2015-1 RRB Questions

1.
Control volume refers to
A.
A fixed region in space
B.
A specified mass
C.
An isolated system
D.
A reversible process only
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ANSWER :
A. A fixed region in space
2.
All of the following are intensive properties EXCEPT
A.
Mass
B.
Density
C.
Pressure
D.
Temperature
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ANSWER :
A. Mass
3.
Fourier's law of heat conduction gives the heat flow for
A.
Irregular surfaces
B.
Non-uniform temperature surfaces
C.
One dimensional cases only
D.
Two dimensional cases only
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ANSWER :
C. One dimensional cases only
4.
Absorptivity of a body is equal to its emissivity
A.
For a polished body
B.
Under thermal equilibrium
C.
At one particular temperature
D.
At shorter wave lengths
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ANSWER :
B. Under thermal equilibrium
5.
A two stroke engine can be identified by
A.
Cooling system
B.
Lubrication system
C.
Absence of valves
D.
Piston size
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ANSWER :
C. Absence of valves
6.
A four stroke, four cylinder SI engine has a swept volume of 450 CC and compression ratio is 8. The clearance volume of each cylinder is equal to
A.
48 CC
B.
55 CC
C.
65 CC
D.
70 CC
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ANSWER :
C. 65 CC
7.
Piston rings are usually made of
A.
Cast iron
B.
Aluminium
C.
Babbitt
D.
Carbon steel
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ANSWER :
A. Cast iron
8.
In submerged arc welding, an arc is produced between a
A.
Carbon electrode and the work
B.
Metal electrode and the work
C.
Bare metal electrode and the work
D.
Two tungsten electrodes and the work
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ANSWER :
C. Bare metal electrode and the work
9.
Weld spatter is
A.
A flux
B.
A filler material used in gas welding
C.
A filler material used in soldering
D.
A welding defect
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ANSWER :
D. A welding defect
10.
Investment casting uses pattern made of
A.
Metal
B.
Wood
C.
Plastic
D.
Wax
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ANSWER :
D. Wax