Electrical Engineering practice bits -23
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
capacity of cell measured in
a. Watt
b. Kwh
c. Ampere-hour
d. Volt
2. Central
terminal of a drycell is said to be
a.
Positive
b.
Negative
c.
Neutral
d.
Charged
3. Which
of the following is a tetra valent
a. Calcium
b. Quartz
c. Germanium
d. Boron
4. Where
n is the number of the shell. The maximum number of electrons in the shell can
be
a. N
b. 2n
c. N2
d. 2n2
5. Pure
silicon is called
a. Intrinsic
semi conductor
b. Doped
semi conductor
c. Active
semi conductor
d. Extrinsic
semi conductor
6. Electrons
are in ___ band and holes are in ___ band
a. CB
VB
b. VB
CB
c. VB
VB
d. CB
CB
7. For
amplification of transistor must be ___ region
a. Saturation
b. Active
c. Cut
off
d. None
8. The
value of 
in
terms of 
in
terms of
a. 
b. 
c. 
d. None
9. To
generate stable oscillations the following oscillator is used
a. Wien
bridge
b. Hartely
c. Colpitt’s
d. Crystal
10. SCR
is used as a
a. Amplifier
b. Switch
c. Clipper
d. Clamper
11. A
60W lamp gives a luminous flux of 1500lumens its efficiency is ___
a.
1500lm/w
b.
250lm/w
c.
25lm/w
d.
2.5lm/w
12. One
lux is same as
a. One
lm/cm
b. One
lm/m2
c. One
lm/100s9m
d. One
lumen/1000s9m
13. Heat
from the filament lamp is transmitted to surrounding mainly through
a.
Conduction
b.
Convection
c.
Radiation
d.
None
of the above
14. Neon
tubes are widely used in
a.
Airport
lighting
b.
Road
signaling
c.
Railway
coaches
d.
Advertising
15. The
following motor is preferred for traction work
a.
Universal
motor
b.
DC
series motor
c.
Synchronous
motor
d.
3-0
induction motor
16. A
pony motor is used for the starting ___ motor
a.
3-⏀ induction motor
b.
3-⏀ syn motor
c.
Slipring
motor
d.
Traction
motor
17. Earthing
used in pole mounted substation is
a.
Rod
earthing
b.
Strip
earthing
c.
Pipe
earthing
d.
Plate
earthing
18. Pi=core loss
Pc=copper loss A transformer has maximum efficiency when
a. 
b. 
c. 
d. 
19. A
transformer transforms
a.
Frequency
b.
Voltage
c.
Current
d.
Voltage
and current
20. Step
up transformer increases
a.
Voltage
b.
Current
c.
Power
d.
Frequency
ANSWERS
1.c
|
2.a
|
3.c
|
4.d
|
5.a
|
6.a
|
7.b
|
8.b
|
9.d
|
10.b
|
11.c
|
12.b
|
13.c
|
14.d
|
15.b
|
16.b
|
17.c
|
18.b
|
19.d
|
20.a
|
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