Q.16 What is the main requirement of an excitation system?
    A. simplicity of control
    B. reliability under all conditions of service
    C. stability and fast transient response
    D. all of the above
Ans.: D

Q.17 An excitation is provided to____
    A. stator winding of synchronous machine
    B. rotor winding of synchronous machine
    C. the connected load
    D. none of the above
Ans.: B

Q.18 An excitation system ____
    A. may be individual
    B. centralized
    C. Both A or B
    D. none of the above
Ans.: C

Q.19 The amount of excitation is depends on___
    A. the load power factor
    B. the load current
    C. speed of the machine
    D. all of the above
Ans.: D

Q.20 An excitation system can be classified as:
    A. AC excitation system
    B. Dc excitation system
    C. static excitation system
    D. all of the above
Ans.: D

Q.21 If load current is larger and power factor is lagging than the_____ excitation required.
    A. less
    B. more
    C. not depend on power factor
    D. does not change
Ans.: B

Q.22 In DC supply system, feeders of different lengths being by one generator the voltage at the each end of the each feeder is kept constant by___
    A. shunt wound generator
    B. series wound DC generator
    C. compound wound DC generator
    D. any of the above
Ans.: B

Q.23 What is full form of AVR
    A. Automatic Voltage Regulator
    B. Automatic Voltage regenerator
    C. Automatic Violation Regulation
    D. none of the above
Ans.: A

Q.24 The main exciter
    A. self exciter
    B. separately exciter
    C. Either Self or separately exciter
    D. Neither of the above
Ans.: C

Q.25 A rotating thyristor excitation system is employs____
    A. self excited main exciter
    B. separately excited main exciter
    C. Either A or B
    D. Both A and B
Ans.: A

Q.26 In rotating thyristor Excitation system, an exciter voltage can be buildup using____
    A. separately exciter
    B. self excitation
    C. residual flux
    D. any of the above
Ans.: C

Q.27 Which of the following excitation system becoming more and more popular?
    A. brush less excitation
    B. DC excitation
    C. AC excitation system
    D. all are same popular
Ans.: A

Q.28 In Brushless excitation system___
    A. it eliminates use of commutator
    B. its eliminates used of collectors and brushes
    C. response time is less than 0.1 second
    D. all of the above
Ans.: D

Q.29 SCR stand for____
    A. Silicon control rectifiers
    B. System control regulators
    C. Silicon control regulators
    D. System voltage control regulators
Ans.: A

Q.30 In static excitation system, the rectifier are connected in parallel to give____
    A. sufficient voltage handling capacity
    B. sufficient current carrying capacity
    C. sufficient dv/ dt rating
    D. sufficient di/dt rating
Ans.: B