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. A
series dissipative regulator is an ex. Of
a.
Linear
regulator
b.
Switching
regulator
c.
Shunt
regulator
d.
Dc-dc
converter
2. An
oscillator produces ___ oscillation
a. Damped
b. Un
damped
c. Modulated
d. None
3. In
DC generator, the cause of rapid brush
wear may be
a. Severe
sparking
b. Rough
commutator surface
c. Imperfect
contact
d. Any
of the above
4. In
lap wdg, the number of brushes is always
a. Double
the no. of poles
b. Same
as the no poles
c. Half
the no. of poles
d. Two
5. Armature
coil is short circuited by brushes when lies
a.
Along
neutral axis
b.
Along
field axis
c.
Any
of above
d.
None
6. The
no. of slip rings on squirrel cage induction motor
a.
Two
b.
Three
c.
Four
d.
None
7. Which
of the following is not a part of transformer installation
a.
Conservator
b.
Breather
c.
Buchholz
relay
d.
Excites
8. While
conducting short circuit test on a transformer the following side is short
circuited
a.
High
voltage side
b.
Low
voltage side
c.
Primary
side
d.
Secondary
side
9. Silicon
steel used in laminations mainly reduces
a.
Hysteresis
loss
b.
Eddy
current losses
c.
Copper
losses
d.
All
10. The
starting torque of a squirrel cage induction motor is
a.
Low
b.
Negligible
c.
Same
as full load torque
d.
More
than full load torque
11. The
value of starting capacitor of a fractional horse power motor will be
a. 100µF
b. 200
µF
c. 300
µF
d. 400
µF
12. Which
of the following meters has a linear scale
a. Thermocouple
meter
b. Moving
iron meter
c. Hot
wore meter
d. Moving
coil meter
13. Which
of the following is difficult to adopt for dimming
a. GLS
lamps
b. Cold
cathode lamps
c. Fluorescent
lamps
d. All
14. The
motor is used in printers
a. Universal
motor
b. Stepper
motor
c. Hysteresis
motor
d. Induction
motor
15. The
usual spans with RCC poles are
a. 40-50m
b. 60-100m
c. 80-100m
d. 300-500m
16. The
corona is considerably affected by which of the following
a. Size
of the conductor
b.
Shape
of the conductor
c.
Surface
condition of the conductor
d. All
17. The
power transmitted will be maximum
a.
Corona losses are minimum
b.
Reactance
is high sending end voltage is more
c.
Receiving
end voltage is more
d.
Reactance
of the line less
18. A3-phase
4 wire system is used on
a. Primary
t/m
b. Secondary
t/m
c. Primary
distribution
d. Secondary
distribution
19. Voltmeter
should be of very high resistance so that
a. Its
range is high
b. Accuracy
is high
c. It
draw current minimum
d. Sensitivity
is high
20. SI
unit of power is
a. Henry
b. Coulomb
c. Watt
d. Watt-hour
ANSWERS
1.A
|
2.B
|
3.D
|
4.B
|
5.A
|
6.D
|
7.D
|
8.B
|
9.A
|
10.A
|
11.C
|
12.D
|
13.C
|
14.C
|
15.C
|
16.D
|
17.D
|
18.D
|
19.C
|
20.C
|
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