# POWER SYSTEM MCQ_62(VOLTAGE CONTROL_06)

Q.76 In DC systems Capacitors is used__
A. as a energy storage device
B. for absorbing voltage surges
C. in voltage grading circuits, electronic circuits
D. all of the above
Ans.: D

Q.77 Why discharge resistors is used in capacitor bank?
A. ensure safety after de-energisation
B. ensure safety while charging
C. Ensure safety while operating
D. no resistors used in capacitor bank
Ans.: A

Q.78 The Capacitor elements can be connected in____ to get desired rated voltage of the bank.
A. parallel
B. series
C. series parallel combination
D. any of the above
Ans.: B

Q.79 In AC systems capacitors is used
A. harmonic filters
B. energy absorption
C. surge absorption
D. all of the above
Ans.: D

Q.80 To get desired MVAr rating of the capacitor bank, the capacitors are connected in___
A. parallel
B. series
C. series parallel combination
D. none of the above
Ans.: A

Q.81 The capacitor units are mounted _____
A. horizontally on the racks
B. Vertically
C. either A or B
D. neither A nor B
Ans.: C

Q.82 Which of the following is used for preventing rupture of the capacitor tank during internal fault?
A. Relay
B. Circuit breaker
C. Fuse
D. Arrestors
Ans.: C

Q.83 Capacitors are designed to operate at_____
A. 100% of rated kVAr
B. 110% of rated kVAr
C. 135% of rated kVAr
D. 150% of kVAr
Ans.: C

Q.84 The maximum peak voltage rating of the capacitor is equal to___
A. 1.5√2 x rated voltage
B. 1.2√3 x rated voltage
C. 1.2√2 x rated voltage
D. 1.5√3 x rated voltage
Ans.: C

Q.85 The kVAr output of the capacitor increases as___
A. directly proportional to the applied voltage
B. Square of the applied voltage
C. inversely as square of the applied voltage
D. cube of the applied voltage
Ans.: B

Q.86 The complete protection of capacitor bank is provided with____
A. Circuit breaker
B. surge arrestor
C. Fuse
D. all of the above
Ans.: D

Q.87 The bus voltage changes with
B. change in reactive power
C. Both A and B
D. change in frequency
Ans.: C

Q.88 Shunt reactor is switching during light load or no load to compensate___
A. capacitive reactive power of line
B. inductive reactive power of line
C. capacitive active power of line
D. inductive active power of line
Ans.: A

Q.89 the voltage at load point is improved by____
A. series capacitor
B. shunt capacitor
C. shunt reactor
D. series reactor
Ans.: B

Q.90 Use of shunt capacitors during____