Q.46 Shunt capacitors are switched ON?
A. when
KVA demand on distribution system is decreases
B. when
KVA demand on distribution system is increases
C. Both B
and D
D. voltage
of the bus is drop
Ans.: C
Q.47 Capacitive reactive volt-amperes
are to be injected when___
A. The voltage
at a bus falls below the reference value
B. The voltage
at a bus rise above the reference value
C. The
voltage is violate at reference value
D. none of
the above
Ans.: A
Q.48 An inductive VARs is injected to____
A. rise
the bus voltage
B. lowers
the bus voltage
C. to
lower the p.f
D. to raise
the power factor
Ans.: B
Q.49 In a SVS which of the following are
employed as switching device?
A. circuit
breakers
B.
Isolators
C.
Thyristors
D. Earth
switches
Ans.: C
Q.50 Thyristors switches are advantages
over mechanical switches__
A.
switching is faster
B.
transient free operation
C. fast step
less variable compensation can be provided
D. all of
the above
Ans.: D
Q.51 In Static VAR system, which of the
following scheme is used?
A. TSC
B. TCR
C. TCR-FC
D. All of
the above
Ans.: D
Q.52 Static VAR Compensations are__
A. those
which have no rotating parts
B. used
for compensation by stabilizing a long transmission line
C. Both A
and B
D. either
A or B
Ans.: C
Q.53 Static VAR Compensations are
employed for___
A. surge
impedance compensation
B.
inductive reactance compensation
C.
Capacitive reactance compensation
D. line
resistance reduction
Ans.: A
Q.54 Under which of the following
condition, Static VAR Compensations maintains constant voltage?
A. load
rejection
B. under
rapidly varying load
C. under
slowly varying load
D. all of
the above
Ans.: D
Q.55 ________ is improved by Static VAR
Compensations.
A. system
stability
B. Both A
and D
C. power
flow of the system
D. power
factor of the system
Ans.: B
Q.56 _______ power is controlled by
SVCs.
A. active
power
B.
apparent power
C.
reactive power
D. all of
the above
Ans.: C
Q.57 The current flowing through the
inductor is controlled by_____ in static VAR Compensators.
A. firing
angles of the thyristors
B. using
variable reactors
C. using
tap changing transformer
D. any of
the above
Ans.: A
Q.58 During light load period the
inductive load absorbed by the inductor is made__ than reactive power generated
by the fixed capacitor.
A. smaller
B. larger
C. remains
constant at any load
D. none of
the above
Ans.:
B
Q.59 _____the reactive power generated
by the fixed capacitor is made larger than the reactive power absorbed by the
inductor
A. During
no load conditions
B. During
very light load conditions
C. During
heavy load conditions
D. During
charging of the transmission lines
Ans.: B
Q.60 Which of the following is connected
to the line during the light load condition?
A. series
reactors
B. series
capacitors
C. shunt
reactors
D. shunt
resistors
Ans.: C
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