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