RRB JE 2015-26-09-2015-1 RRB Question Paper

RRB JE 2015 Question Papers

RRB JE 2015-26-09-2015-1 RRB Questions

21.
Turbine used for low head is
A.
Kaplan turbine
B.
Francis turbine
C.
Pelton Wheel turbine
D.
Propeller turbine
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ANSWER :
A. Kaplan turbine
22.
Transformer ratings are usually expressed in
A.
kVA
B.
kW
C.
kWh
D.
kVAR
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ANSWER :
A. kVA
23.
A step up transformer increases
A.
power
B.
resistance
C.
voltage
D.
frequency
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ANSWER :
C. voltage
24.
In an AC circuit, the ratio of kW / kVA represents
A.
Power factor
B.
Form factor
C.
Load factor
D.
Diversity factor
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ANSWER :
A. Power factor
25.
Depletion layer is found in
A.
p type semiconductors
B.
n type semiconductors
C.
diodes
D.
intrinsic semiconductors
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ANSWER :
C. diodes
26.
The energy gap in a semiconductor is
A.
zero
B.
infinite
C.
very high
D.
of the order of 1 eV
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ANSWER :
D. of the order of 1 eV
27.
BJT stands for
A.
Binomial Junction Terminal
B.
Bipolar Junction Transistor
C.
Binomial Junction Transistor
D.
Bipolar Junction Terminal
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ANSWER :
B. Bipolar Junction Transistor
28.
The following figure is an electrical equivalent of [Refer diagram in PDF]
A.
NOT gate
B.
OR gate
C.
NOR gate
D.
NAND gate
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ANSWER :
B. OR gate
29.
The hexadecimal equivalent of the decimal number 210 is
A.
H1
B.
F2
C.
D2
D.
H2
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ANSWER :
C. D2
30.
The number of atoms in a body centred unit cell is
A.
1
B.
2
C.
3
D.
4
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ANSWER :
B. 2