RRB JE 2015-27-09-2015-3 RRB Question Paper

RRB JE 2015 Question Papers

RRB JE 2015-27-09-2015-3 RRB Questions

31.
For a P-N junction diode, the current in reverse bias may be
A.
few amperes
B.
few milliamperes
C.
between 0.5 A to 1 A
D.
few microamperes to nanoamperes
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ANSWER :
D. few microamperes to nanoamperes
32.
A full wave bridge rectifier is supplied voltage at 50 Hz. The lowest ripple frequency will be
A.
400 Hz
B.
200 Hz
C.
100 Hz
D.
50 Hz
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ANSWER :
C. 100 Hz
33.

Identify the following logic gate

A.

AND gate

B.

OR gate

C.

NAND gate

D.

NOT gate

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ANSWER :

C. NAND gate

34.
The forbidden energy gap for germanium is
A.
0.12 eV
B.
0.72 eV
C.
1.11 eV
D.
1.52 eV
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ANSWER :
B. 0.72 eV
35.
The term nominal stress in stress-strain curve for mild steel implies
A.
Average stress
B.
Actual stress
C.
Yield stress
D.
Stress at necking
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ANSWER :
A. Average stress
36.
Inorganic soil with low compressibility is represented by
A.
MH
B.
SL
C.
ML
D.
CH
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ANSWER :
C. ML
37.
Minimum grade of concrete to be used in reinforced concrete is
A.
M 10
B.
M 15
C.
M 20
D.
M 25
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ANSWER :
C. M 20
38.
Which one of following is a compression member?
A.
Purlin
B.
Boom
C.
Girt
D.
Tie
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ANSWER :
B. Boom
39.
Absolute pressure in flow system
A.
is always above local atmospheric pressure
B.
is equal to a vacuum pressure
C.
May be above, below or equal to the local atmospheric pressure
D.
is also called negative pressure
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ANSWER :
C. May be above, below or equal to the local atmospheric pressure
40.
Gantt charts indicate
A.
Comparison of actual progress with the scheduled progress
B.
Balance of work to be done
C.
Progressive cost of project
D.
Inventory costs
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ANSWER :
A. Comparison of actual progress with the scheduled progress