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
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