RRB JE 2015-27-09-2015-1 RRB Question Paper

RRB JE 2015 Question Papers

RRB JE 2015-27-09-2015-1 RRB Questions

21.
The difference between synchronous speed and actual speed of a motor is called
A.
lag
B.
regulation
C.
slip
D.
backlash
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ANSWER :
C. slip
22.
Which of the following motor is self starting?
A.
Split motor
B.
Shaded pole motor
C.
Reluctance motor
D.
Hysterisis motor
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ANSWER :
B. Shaded pole motor
23.
Water hammer pressure is relieved by
A.
penstock
B.
draft tube
C.
turbine
D.
surge tank
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ANSWER :
D. surge tank
24.
TIG Welding stands for
A.
Temperature Insulated Gas Welding
B.
Tungsten Inert Gas Welding
C.
Thermally Induced Gas Welding
D.
Tungsten Insulated Gas Welding
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ANSWER :
B. Tungsten Inert Gas Welding
25.
The type of modulation used in the T.V picture transmission is
A.
amplitude modulation
B.
phase modulation
C.
frequency modulation
D.
modulation is not needed
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ANSWER :
A. amplitude modulation
26.
The process of extracting the signal from the modulated wave is called
A.
modulation
B.
detection
C.
amplification
D.
resonance
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ANSWER :
B. detection
27.
An OR gate has 4 inputs. One input is high and the other three are low. The output
A.
is high
B.
is low
C.
is alternately high and low
D.
may be high or low depending on inputs
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ANSWER :
A. is high
28.
Decimal 43 in hexadecimal is
A.
2B
B.
B2
C.
2C
D.
C2
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ANSWER :
A. 2B
29.
A JFET is
A.
a current controlled device
B.
a low input resistance
C.
a voltage controlled device
D.
is always forward biased
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ANSWER :
C. a voltage controlled device
30.
Which type of gain is achieved using CB configuration
A.
current
B.
voltage
C.
resistance
D.
power
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ANSWER :
B. voltage