RRB JE 2015-26-09-2015-2 RRB Question Paper

RRB JE 2015 Question Papers

RRB JE 2015-26-09-2015-2 RRB Questions

1.
A system and its environment put together constitute
A.
An adiabatic system
B.
An isolated system
C.
A segregated system
D.
A homogeneous system
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ANSWER :
B. An isolated system
2.

Slope of constant volume line on temperature entropy diagram is given by

A.

\( \frac{Cp}{T} \)

B.

\( \frac{T}{Cp} \)

C.

\( \frac{Cv}{T} \)

D.

\( \frac{T}{Cv} \)

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ANSWER :

D.\( \frac{T}{Cv} \)

3.
Stefen Boltzman law is applicable to
A.
Gray body
B.
White body
C.
Black body
D.
Blue body
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ANSWER :
C. Black body
4.
Heat is transferred by conduction, convection and radiation in
A.
Insulated pipes carrying hot water
B.
Refrigerator freezer coils
C.
Melting of ice
D.
Boiler furnaces
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ANSWER :
D. Boiler furnaces
5.
A four stroke diesel engine has
A.
One valve
B.
Two valves
C.
Three valves
D.
Four valves
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ANSWER :
C. Three valves
6.
A certain engine produces 10 kw indicated power. Its mechanical efficiency is 70%. Then the frictional power is
A.
2 kw
B.
2.5 kw
C.
3 kw
D.
3.5 kw
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ANSWER :
C. 3 kw
7.
Morse test is applicable only to
A.
Single cylinder SI engines
B.
Single cylinder CI engines
C.
Multi-cylinder CI engines
D.
Multi-cylinder SI and CI engines
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ANSWER :
D. Multi-cylinder SI and CI engines
8.
The consumable electrode is used in
A.
Carbon arc welding
B.
Submerged arc welding
C.
TIG welding
D.
MIG Welding
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ANSWER :
D. MIG Welding
9.
The phenomenon of weld decay occurs in
A.
Cast iron
B.
Brass
C.
Bronze
D.
Stainless steel
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ANSWER :
D. Stainless steel
10.

The given figure represents

A.

Up milling

B.

Down milling

C.

Climb milling

D.

Angular milling

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ANSWER :

A. Up milling