RRB JE 2015-27-09-2015-2 RRB Question Paper

RRB JE 2015 Question Papers

RRB JE 2015-27-09-2015-2 RRB Questions

1.
First law of thermodynamics deals with
A.
Conservation of heat
B.
Conservation of momentum
C.
Conservation of mass
D.
Conservation of energy
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ANSWER :
D. Conservation of energy
2.
An isothermal process is governed by
A.
Boyle's law
B.
Charles law
C.
Gay-lussac's law
D.
Avogadro's law
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ANSWER :
A. Boyle's law
3.
A carburetor is used to supply
A.
Petrol, air and lubricating oil
B.
Air and diesel
C.
Petrol and lubricating oil
D.
Petrol and air
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ANSWER :
D. Petrol and air
4.
A diesel engine has compression ratio from
A.
6 to 10
B.
10 to 15
C.
15 to 25
D.
25 to 40
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ANSWER :
C. 15 to 25
5.
Heat is closely related with
A.
Energy
B.
Temperature
C.
Entropy
D.
Enthalpy
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ANSWER :
B. Temperature
6.
Metals are good conductor of heat because
A.
Their atoms collide frequently
B.
Their atoms are relatively far apart
C.
They contain free electron
D.
They have high density
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ANSWER :
A. Their atoms collide frequently
7.
Heat conduction in gases is due to
A.
Electromagnetic waves
B.
Motion of electrons
C.
Mixing motion of the different layers of the gas
D.
Elastic impact of molecules
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ANSWER :
D. Elastic impact of molecules
8.
In shielded arc welding
A.
Large electrode is used
B.
Welding rod coated with slag is used
C.
Welding rod coated with flux material is used
D.
Welding rod is not used
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ANSWER :
C. Welding rod coated with flux material is used
9.

Oxyacetylene flame having more amount of C2H2 is called

A.

Oxidizing flame

B.

Neutral flame

C.

Carburizing flame

D.

Red flame

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ANSWER :

C. Carburizing flame

10.
Nose radius is expressed in
A.
Degree
B.
Radian
C.
mm
D.
Steradian
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ANSWER :
C. mm