Electrical Engineering practice bits -20
Electrical Engineering practice bits -19
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The following practice bits are useful the Electrical Aspirants who are preparing for the Different competitive exams like RRB JE ,SSC JE, ECET , GATE , PSU, PGECET,DRDO CEPTAM ,TSTRANSCO, TSGENCO, TSSSPDCL , TSNPDCL AE AND SE, APTRANSCO, APGENCO, ....ETC
MCQ Questions With Answers
1. AT
standstill condition the value of slip is
a. 0
b. 1
c. infinity
d. 100
2. The
symbol used for inductance is
a. 
b. 
c. 
d. 
3. The
specific graviy of electrolyte is measured by
a. Mano
meter
b. Mechanical
gauge
c. Hydro
meter
d. Psychrometer
4. ____
of electrolyte indicates the state of charge of battery
a.
Color
b.
Mass
c.
Visiosity
d.
Specific
gravity
5. The
charge required to calibrate one gram equivalent of any substance is known
as____ constant
a.
time
b.
faradays
c.
boltsman
d.
date
6. the
open circuit voltage of any storage cell depnds wholly
a.
its
chemical constituents
b.
on
the strength of its electrolyte
c.
its
temperature
d.
All
above
7. Unit
of luminous efficiency is
a.
Lumen/watt
b.
Watt/lumen
c.
Lux
d.
lumens
8. The
resistance of an open circuit is equal to
a. 0
b. Lesser
than one ohm
c. Infinite
d. Less
than before
9. Power
factor of an AC circuit is equal to
a. Cosine
of angle between voltage and current
b. Tangent
of angle between voltage and current
c. Impedance
d. Apparent
power
10. An
ideal operational amplifier has
a. Infinite
o/p impedance
b. Zero
i/p impedance
c. Infinite
gain
d. All
of the above
11. An
oscillator converts___
a. AC
power into DC power
b. DC
power into AC power
c. Mechanical
power into ac power
d. None
of the above
12. Which
one of the following material is used for to doping to prepare N-type
semiconductor
a.
Indium
b.
Gallium
c.
Arsenic
d.
Silver
13. Which
one of the following material is used for doping to prepare p-type
semiconductor
a.
Arsenic
b.
Antimony
c.
Indium
d.
Phosphorus
14. Lamination
of core are made of
a.
Cast
iron
b.
Carbon
c.
Silicon
steel
d.
Stainless
steel
15. The
armature of DC generator is laminated to
a.
Reduce
the bulk
b.
Provide
the bulk
c.
Insulate
the core
d.
Reduce
eddy current loss
16. Permeance
is the reciprocal of
a. Flux
density
b. Reluctance
c. Ampere
turns
d. Resistance
17. Which
of the following doesn’t change in a transformer
a. Current
b. Voltage
c. Frequency
d. All
of the above
18. The
emf generated in a dc generator is directly proportional to
a. Flux/pole
b. Speed
of armature
c. No.
of poles
d. All
of the above
19. A
transformer core is laminated to
a. Reduce
hysteresis loss
b. Reduce
eddy current losses
c. Reduce
copper loss
d. Reduce
all above loss
20. In a
transformer the energy is conveyed from primary to secondary
a. Through
cooling coil
b. Through
air
c. By
the flux
d. None
ANSWERS
1.B
|
2.C
|
3.C
|
4.D
|
5.B
|
6.D
|
7.A
|
8.C
|
9.A
|
10.C
|
11.B
|
12.C
|
13.C
|
14.C
|
15.D
|
16.B
|
17.C
|
18.D
|
19.B
|
20.C
|
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