Electrical Engineering practice bits -17
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. Transformers:
a.
Transforms
frequency
b.
Transforms
voltage
c.
Transforms
current
d.
Transforms
current and voltage
2. The
period of a wave is
a.
Same
as frequency
b.
Time
required to complete one cycle
c.
Expressed
in amperes
d.
None
3. The
form factor is the ratio of
a.
Peak
value of rms value
b.
Rms
value to average value
c.
Average
value to rms value
d.
None
4. The
time period of a sine wave is 1/50 seconds. Its frequency is ___
a.
20Hz
b.
30
Hz
c.
40
Hz
d.
50
Hz
5. A
heater is rated as 230V, 10KW, AC the value of 203 refers to ____
a. Average
voltage
b. Rms
voltage
c. Peak
voltage
d. None
6. The
peak value of a sine wave is 200V. its average value is ___
a. 127.4V
b. 141.4V
c. 282.8V
d. 200V
7. The
rms value of a sine wave is 100A, its peak value is
a. 70.7A
b. 141.4A
c. 150A
d. 282.8A
8. The
maximum permissible value of earth resistance for a small substation
a. One
ohm
b. Two
ohm
c. Three
ohm
d. Four
ohm
9. Relative
permittivity can be measured by ___ bridge
a. Wheatstone
b. Hay’s
c. Schering
d. Kelvins
bridge
10. A
pony motor is basically
a. Iinduction
motor
b. Synchronous
motor
c. Dc
motor
d. Stepper
motor
11. 3
phase synchronous motor having how many slip rings
a.
1
b.
2
c.
3
d.
4
12. In
electrical measuring instruments electrical energy is converted into
a.
Heat
energy
b.
Light
energy
c.
Electrical energy
d.
Mechanical
energy
13. The
most effective damping is
a.
Eddy
current damping
b.
Air
friction damping
c.
fulid
friction damping
d.
spring
damping
14. In
high voltage transmission line earth conductor is used ___
a.
Above
b.
Below
c.
At
the same level
d.
None
15. Function
of steel wire in a ACSR conductor is
a. To
help carry additional current
b. To
reduce the resistance
c. To
take up the mechanical tension in the line
d. All
of the above
16. Which
is best conductor of electricity___
a. Copper
b. Aluminium
c. Iron
d. Silver
17. Aluminiumm
is preferred to copper for transmission line because
a. It
has good conductivity
b. It
has less weight compared to copper
c. It
is available in india in plenty
d. None
18. Resistors
commonly used in power circuits are ___
a.
Wire
wound resistors
b.
Carbon
resistors
c.
Deposited
metal resistors
d.
Thick
film, thin film resistor
19. Coating
usually recommended for electrical contacts is that of ___
a.
Tin
b.
Gold
c.
Chromium
d.
Silver
20. Resistance
of 250V, 100W lamp will be___
a.
0.4Ω
b.
25
Ω
c.
625
Ω
d.
2.5
Ω
ANSWERS
1.d
|
2.b
|
3.b
|
4.d
|
5.b
|
6.a
|
7.c
|
8.a
|
9.c
|
10.a
|
11.b
|
12.d
|
13.a
|
14.a
|
15.c
|
16.d
|
17.b
|
18.a
|
19.d
|
20.c
|
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https://www.electricalforu.com/2020/01/electrical-engineering-practice-bits-20.html
https://www.electricalforu.com/2020/01/electrical-engineering-practice-bits-19.html
https://www.electricalforu.com/2020/01/electrical-engineering-practice-bits-18.html
https://www.electricalforu.com/2020/01/electrical-engineering-practice-bits-16.html
https://www.electricalforu.com/2020/01/electrical-engineering-practice-bits-15.html
https://www.electricalforu.com/2020/01/electrical-engineering-practice-bits-20.html
https://www.electricalforu.com/2020/01/electrical-engineering-practice-bits-19.html
https://www.electricalforu.com/2020/01/electrical-engineering-practice-bits-18.html
https://www.electricalforu.com/2020/01/electrical-engineering-practice-bits-16.html
https://www.electricalforu.com/2020/01/electrical-engineering-practice-bits-15.html
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