Power System - II (3150911) MCQs

MCQs of Basic Principles

Showing 31 to 40 out of 135 Questions
31.
A feeder with reactance of 0.2 pu has a sending-end voltage of 1.2 pu If the reactive power supplied at the receiving end of the feeder is 0.3 pu, the approximate voltage drop in the feeder will be
(a) 0.042 pu
(b) 0.052 pu
(c) 0.060 pu
(d) 0.070 pu
Answer:

Option (b)

32.
The calculations performed using short-line approximate model instead of nomial-π model for a medium length transmission line delivering lagging load at a given receiving-end voltage always result in higher.
1. sending-end current.
2. sending-end power.
3. regulation.
4. Efficiency.
Which of these statements are correct ?
(a) 1 and 2
(b) 3 and 4
(c) 1, 2 and 3
(d) 1, 2 and 4
Answer:

Option (c)

33.
As the frequency of supply system increased, the charging MVAR
(a) Increases
(b) Decreases
(c) Remains the same
(d) None of above
Answer:

Option (a)

34.
Receiving end voltage for long transmission line under no load condition is
(a) Less than sending end voltage
(b) More than sending end voltage
(c) Equal to sending end voltage
(d) Any of above
Answer:

Option (b)

35.
For a given receiving end voltage in a long transmission line, sending end voltage is more than the actual calculated by
(a) Nominal π method
(b) Nominal T method
(c) End condenser method
(d) None of above
Answer:

Option (a)

36.
A short line with R/X ratio 1, the zero regulation is obtained when the power factor of the load is
(a) 0.5
(b) Unity
(c) Zero leading
(d) 0.707 leading
Answer:

Option (d)

37.
If the line is loaded with the surge impedance, the receiving end voltage
(a) Less than sending end voltage
(b) Equal to sending end voltage
(c) More than sending end voltage
(d) None of above
Answer:

Option (b)

38.
The transfer of reactive power over a line mainly depends upon
(a) Vr
(b) Vs
(c) Vs - Vr
(d) Power angle
Answer:

Option (c)

39.
With 100% series compensation of lines
(a) Low transient voltage
(b) High transient voltage
(c) Current is series resonant at power frequency
(d) Both (b) and (c)
Answer:

Option (d)

40.
Line constant of a transmission line are
(a) Lumped
(b) Non-uniformly distributed
(c) Uniformly distributed
(d) None of above
Answer:

Option (b)

Showing 31 to 40 out of 135 Questions