Electrical Engineering practice bits -18
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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. Creeping
error occurs in which of the following instrument
a.
Energy
meter
b.
EMMC
c.
PMMC
d.
MI
2. Which
of the following can be used as light dimming device
a.
Auto
transformer
b.
Variable
reaction
c.
SCR
d.
All
of the above
3. Galvanized
steel wire is generally used as
a.
Stay
wire
b.
Earth
wire
c.
Structural
components
d.
All
of the above
4. A
feeder in a transformer system, feeds power to
a. Distributors
b. Generating
stations
c. Service
mains
d. All
of the above
5. Cells
are connected in series in order to increase the
a. Current
capacity
b. Life
of the cell
c. Voltage
rating
d. Terminal
voltage
6. Cell
are connected in paralled in order to increase the
a. Life
of the cells
b. Efficiency
c. Current
capacity
d. Voltage
rating
7. When
two cells are connected in parallel, it should ensure that have
a. Identical
internal resistance
b. Equal
emfs
c. Same
ampere hour capacity
d. None
8. The
capacity of a battery expressed in s
a. Amperes
b. Amperes-hour
c. Watts
d. Watt-hour
9. Which
one is classified as integrating instruments
a. Darsonual
galvanometer
b. Ampere
hour meters
c. Ohm-meter
d. Ammeter
10. Which
of the following types of instrument is an integrating instrument
a. PF
meters
b. Energy
meter
c. Watt-meter
d. Frequency
meter
11. The
induction motor having 4 pole 50Hz ,slip is 4% .what is the speed of the motor
a. 1500
b. 1440
c. 1000
d. 940
12. Measurement
of frequency by
a. Owen
bridge
b. Wiens bridge
c. Schering
bridge
d. Heaviside
bridge
13. Which
material is used in controlling chain reaction in a nuclear reactor
a. Thorium
b. Heavy
water
c. Boron
d. Beryllium
14. Ash
collected in coal mines is
a. Hopper
b. Converyor
belt
c. Collector
d. None
15. The
directional of induced emf can be found by
a. Laplace
law
b. Lenz
law
c. Flemming’s
right hand rule
d. KVL
law
16. The
rms value of AC is equal to
a.
0.637
of max. value
b.
0.707
of max value
c.
1.414
of max value
d.
The
maximum value
17. The
value of form factor for a pure sine-wave is
a.
1.414
b.
0.707
c.
0.637
d.
1.11
18. Power
factor is defined as the ratio
a. 
b. 
c.
d. 
19. What
is the value of line voltage if the value of phase voltage is 240V in
y-connection
a.
VL=400V
b.
VL=420V
c.
VL=415V
d.
VL=440V
20. Below
the breakdown region the leakage current of a silicon diode is of order
a.
1pico
amp
b.
100
pico amp
c.
1micro
amp
d.
100
micro amp
ANSWERS
1.A
|
2.D
|
3.D
|
4.A
|
5.C
|
6.C
|
7.B
|
8.B
|
9.B
|
10.B
|
11.A
|
12.B
|
13.C
|
14.A
|
15.C
|
16.B
|
17.D
|
18.A
|
19.C
|
20.A
|
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