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

RRB JE 2015 Question Papers

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

31.
How many electrons are there in the valence shell of a pure semiconductor?
A.
1
B.
3
C.
4
D.
6
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ANSWER :
C. 4
32.
Exclusive-OR (XOR) logic gates can be constructed from what other logic gates?
A.
OR gates only
B.
AND gates and NOT gates
C.
AND gates, OR gates, and NOT gates
D.
OR gates and NOT gates
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ANSWER :
C. AND gates, OR gates, and NOT gates
33.
The process of mixing AF signal and RF waves is known as
A.
modulation
B.
demodulation
C.
oscillation
D.
amplification
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ANSWER :
A. modulation
34.
The main advantage of frequency modulation over amplitude modulation is
A.
that there will be no distortion
B.
that the complete information is contained in the side bands
C.
that it uses a wider band of frequencies
D.
the elimination of noises
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ANSWER :
D. the elimination of noises
35.
If the modulus of elasticity is zero, the material is said to be
A.
Rigid
B.
Elastic
C.
Flexible
D.
Plastic
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ANSWER :
D. Plastic
36.
Water content of soil can be
A.
Greater than 100 %
B.
Less than 0%
C.
Only from 0% to 100%
D.
Never be greater than 100%
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ANSWER :
A. Greater than 100 %
37.
The maximum percentage of moment redistribution allowed in RCC beams is
A.
10%
B.
20%
C.
30%
D.
40%
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ANSWER :
C. 30%
38.
Bending compressive and tensile stresses respectively are calculated based on
A.
Net area and gross area
B.
Gross area and net area
C.
Net area in both cases
D.
Gross area in both cases
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ANSWER :
B. Gross area and net area
39.
The liquid used in manometers should have
A.
Low density
B.
High density
C.
Low surface tension
D.
High surface tension
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ANSWER :
B. High density
40.
Which of the following instruments is generally used for base line measurements?
A.
Chain
B.
Metallic tape
C.
Steel tape
D.
Invar tape
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ANSWER :
D. Invar tape