Q.1 Which of the following is the main
cause responsible for voltage variation in the power system?
A. the
variation in the load on the supply system
B. the
variation in the generation
C. the
variation in the transmission voltage
D. all of
the above
Ans.: A
Q.2 If the load on the supply system is
increases the voltage at the consumers premises ___
A. remains
constant
B. falls
C.
increases
D. does
not depend on the load
Ans.: B
Q.3 The voltage falls at the consumers
premises is due to voltage drop in the
A.
transformer and alternator synchronous impedance
B. feeders
and distributors
C.
transmission lines
D. all of
the above
Ans.: D
Q.4 Which of the following is declared supply
voltage variation at consumers level?
A. ±6%
B. ±12%
C. ±5%
D. ±3%
Ans.: A
Q.6 At which of the following places the
voltage control equipment or devices are installed?
A. the
feeders end
B. transformer
substations supplying to feeders
C.
generating stations
D. all of
the above
Ans.: D
Q.7 In case of feeders of equal lengths fed
from it in DC supply system voltage can be controlled by using___
A. under-compound
DC generator
B. DC shunt
generator
C. over
compound DC generator
D. series DC
generator
Ans.: C
Q.8 Which of the following methods the
voltage can be controlled in Ac supply system?
A. Use of
booster transformers
B. Use of
induction regulators
C. Use of synchronous
condensers
D. all of
the above
Ans.: D
Q.9 At generating stations the voltage
can be controlled by____
A.
Excitation control
B. voltage
regulators
C. Both A
and B
D. use of
shunt reactors
Ans.: C
Q.10 The voltage can be controlled in
EHV transmission lines by using__
A. series
capacitors
B. shunt
reactors
C. use of
tap changing transformers at sending end or receiving end
D. all of
the above
Ans.: D
Q.11 switching in Shunt reactors during
___
A. heavy
load
B. Both C
and D
C. light
loads
D. while energizing
long EHV lines
Ans.: B
Q.12 For step less control of voltage
and reactive power is done by
A. series
reactors
B. shunt
capacitors and thyristorised control
C.
excitation control
D. all of
the above
Ans.: B
Q.13 Tap changing transformer is use at
A. sending
end or receiving end of transmission lines
B.
transmission and distribution substations
C. in
factories substations
D. all of
the above
Ans.: D
Q.14 The feeder booster is___
A. shunt
generator
B. DC
series generator
C. Differential
compound generator
D.
Cummulative compound DC generator
Ans.: B
Q.15 The variation of voltage may
cause__
A.
malfunctioning of consumers appliances
B.
decrease in efficiency of equipment
C.
inconsistent operation of power plant
D. All of
the above
Ans.: D
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