Power System - II (3150911) MCQs

MCQs of Transients in Power Systems

Showing 81 to 90 out of 106 Questions
6 7 8 9 10 11
81.
For an open circuited line,  the resulting current will be
(a) Zero
(b) Infinity
(c) Equal to the incident voltage
(d) Twice the incident voltage
Answer:

Option (a)

82.
For short circuited line,  the resulting voltage will be
(a) Infinity
(b) Zero
(c) Equal to the incident current
(d) Twice the incident current
Answer:

Option (b)

83.
For a transmission line the standing wave ratio is the ratio of
(a) Peak voltage to RMS voltage
(b) Maximum current to minimum current
(c) Maximum voltage to minimum voltage
(d) Maximum impedance to minimum impedance
Answer:

Option (c)

84.
The steepness of the wave front can be reduced by connecting
(a) An inductor in series with the line
(b) A capacitor between line and earth
(c) Either (a) or (b)
(d) An inductor between line and earth or a capacitor in series with line
Answer:

Option (c)

85.
Steepness of the traveling wave is attenuated by
(a) Line resistance
(b) Line  inductance
(c) Line capacitance
(d) Both (b) and (c)
Answer:

Option (a)

86.
Reflection coefficient of the voltage wave in overhead line is
(a) R0R0-RL
(b) RLR0-RL
(c) RL-R0R0+RL
(d) R0+RLR0-RL
Answer:

Option (c)

87.
Reflection coefficient of a short circuited line is
(a) -1
(b) 1
(c) 0.5
(d) Zero
Answer:

Option (a)

88.
The propagation constant of a transmission line is 0.15×10–3 + j1.5×10–3. The wavelength of the traveling wave is
(a) 15×10–3/2π
(b) 2π/15×10–3
(c) 15×10–3/π
(d) π/15×10–3
Answer:

Option (b)

89.
Reflection coefficient at the load end of short circuited line is
(a) Zero
(b) 10°
(c) 190°
(d) 180°
Answer:

Option (d)

90.
For an open circuited transmission line the reflection coefficient is
(a) 1
(b) -1
(c) Zero
(d) Infinity
Answer:

Option (a)

Showing 81 to 90 out of 106 Questions
6 7 8 9 10 11