Electrical Engineering practice bits -21
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. The
magnetizing current of a Transformer is usually small because
a. Small
air gap
b. Large
leakage flux
c. Laminated
silicon
d. Fewer
rotating parts
2. Which
of the following doesn’t change in ordinary transformer
a. Frequency
b. Voltage
c. Current
d. None
3. The
frame of an induction motor is usually made of
a. Silicon
steel
b. Cost
iron
c. Aluminium
d. Bronze
4. Which
of the following componenet is usually fabricated out of silicon steel
a. Bearings
b. Shaft
c. Stator
core
d. None
of the above
5. A
pony motor is basically a
a. Small
induction motor
b. Dc
series motor
c. DC
shunt motor
d. Double
wdg AC/DC motor
6. In a
moving coil instrument, damping torque is developed by
a. Air
friction
b. Eddy
current
c. Gravity
friction
d. Fluid
friction
7. The
force acting in a MC instrument is equal to
a. BIV
b. Blv
sinq
c. Bil
d. Bli2
8. Which
instrument is used for measuring the insulation resistance
a. Ohmmeter
b. Voltmeter
c. Ammeter
d. Megger
9. A
efficiency of ESP in thermal plants
a. 20%
b. 60%
c. 90%
d. 99%
10. Hays
bridge measures the
a.
Low Q values
b.
High
Q
c.
Medium
Q
d.
Very
small Q
11. ___
are the conductors, which connect the consumer terminal to the distribution
a.
Distributor
b.
Service
mains
c.
Feeders
d.
None
12. By
which of the following system electric power may be transmitted
a.
Over
head system
b.
Underground
system
c.
Both
a and b
d.
None
13. Large
industrial consumers are supplied electrical energy
a.
400V
b.
11KV
c.
66KV
d.
132KV
14. Which
type of diode is used in radio receivers
a. Signal
diodes
b. Switching
diodes
c. Point
contact diodes
d. High
power diodes
15. The
barrier potential of germanium substance is
a. 0.7
V
b. 0.5V
c. 0.3V
d. 0.2V
16. The
effect of corona is
a. Increased
inductance
b. Increased
reactance
c. Increased
power loss
d. None of the above
17. The
chances of occurrence of corona are maximum during
a. Humid
weather
b. Dry
weather
c. Winter
d. Hot
summer
18. The
surge impedance of cable is around
a. 20Ω
b. 50 Ω
c. 100
Ω
d. 250
Ω
19. Skin
effect exist in
a. Cable
carrying DC shunt
b. DC
transmission line only
c. AC
transmission line supply
d. DC
and AC transmission lines
20. PIV
stands for
a. Peak
instantaneous voltage
b. Polarity
indentification value
c. Peak
inverse voltage
d. Peak
inverse voltage
ANSWERS
1.A
|
2.A
|
3.B
|
4.C
|
5.A
|
6.B
|
7.C
|
8.D
|
9.C
|
10.B
|
11.B
|
12.C
|
13.D
|
14.A
|
15.C
|
16.C
|
17.A
|
18.B
|
19.C
|
20.C
|
FOR MORE PRACTICE BITS CLICK BELOW LINKS
👇👇👇👇Android Apps for Students 👇👇👇👇
Electrical Machines Nptel Notes
gate previous papers
ese previous papers
nptel Electrical machines videos
nptel power electronics notes
