Q. 1 Normally a transmission loss of
about ______ is permissible in power system.
A. 20%
B. 25%
C. 15%
D. 10 %
Ans.: C
Q.2 The light output of the lamp is ___
as the operating voltage is reduced below a certain rated voltage.
A. does
not depend on voltage
B.
increases
C. remains
same
D.
decreases
Ans.: D
Q.3 What happens if the induction motor
operated at lower voltages?
A. draws
more current for the same torque
B. draws
less current for the same torque
C. draws
more current for lower torque
D. draws
less current for higher torque
Ans.: A
Q.4 Why the maximum power transfer
problem becomes more complicated?
A. because
presence of inductive load
B. because
presence of capacitive load
C. because
presence of synchronous machines in the electric power system
D. because
presence of asynchronous machines in the electric power system
Ans.: C
Q.5 The magnitude of maximum power that
can be transmitted from source to load is depends on____
A. range
of voltage that is available from the source
B. the
current carrying ability of the various components of the system
C. Both A
and B
D. Neither
A nor B
Ans.: C
Q.6 What happens, If a synchronous motor
is connected to a synchronous generator?
A.
stalling of synchronous motor
B. wild
fluctuation of voltage in transmission line
C. wild fluctuation
of current in transmission line
D. all of
the above
Ans.: A
Q.7 What will be the result of loss of synchronization
if two generators are connected?
A. wild fluctuation
of current in transmission line
B. wild
fluctuation of voltage in transmission line
C. Neither
A nor B
D. Both A
and B
Ans.: D
Q.8 The power system synchronization stability
can be divided into___
A. steady
state stability
B. transient
state stability
C. Both A
and B
D. none
Ans.: C
Q.9 The _____ is the stability of the
system under conditions of gradual or relatively slow change in load.
A.
Transient state stability
B. steady state
stability
C. Sub
transient state stability
D. Voltage
instability
Ans.: B
Q.10 The ____ is the maximum flow of power possible through a point without losing the stability
with sudden change and large change in the network conditions.
A.
Transient state stability
B. steady state
stability
C. Sub
transient state stability
D. Voltage
instability
Ans.: A
Q.11 The maximum power can be transferred
from 0ne end to other end when the reactance of the line is ___
A. 2 times
its resistance
B. √3
times its resistance
C. √2
times its resistance
D. √3
times its capacitance
Ans.: B
Q.12 In power system the power can be transferred
only if ______ is present.
A.
resistance
B.
reactance
C.
capacitance
D. all of
the above
Ans.: B
Q.13 In power system the reactance is
____ as compared to resistance.
A. less
B. large
C. equal
D. none of
the above
Ans.: B
Q.14 If the reactance of the
transmission line is zero,__
A. maximum
power can be transmitted
B. power
cannot be transmitted
C. half
the full capacity power can be transmitted
D. 2 times
of its capacity power can be transmitted
Ans.: B
Q.15 For a lossless line resistance is__
A. minimum
B. maximum
C. zero
D.
infinity
Ans.: C
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