Power System - II (3150911) MCQs

MCQs of Transients in Power Systems

Showing 41 to 50 out of 106 Questions
2 3 4 5 6 7
41.
The transmission capacity of a line at 50 Hz as compared to that at 60 Hz is
(a) Lower
(b) Higher
(c) Same
(d) Insufficient data
Answer:

Option (b)

42.
As the line inductance increases, the transmission capacity
(a) Increases
(b) Decreases
(c) Remains same
(d) Insufficient data
Answer:

Option (b)

43.
When the load on a transmission line is equal to the surge impedance loading
(a) Receiving end voltage is less than sending end voltage
(b) Sending end voltage is less than receiving end voltage
(c) Receiving end voltage is equal to the sending end voltage
(d) None of above
Answer:

Option (c)

44.
The receiving end voltage of a transmission line will be greater than sending end voltage if the load is
(a) Greater than surge impedance loading
(b) Less than surge impedance loading
(c) Equal to surge impedance loading
(d) Insufficient data
Answer:

Option (b)

45.
Surge impedance loading of a single circuit of 220 kV line is
(a) 120 MW
(b) 90 MW
(c) 220 MW
(d) 400 MW
Answer:

Option (a)

46.
Surge voltage of 1000 kV is applied to an overhead line with its receiving end open. If the surge impedance of line is 500 Ω, then total surge power in the line is
(a) 2000 MW
(b) 500 MW
(c) 2 MW
(d) 0.5 MW
Answer:

Option (a)

47.
The ratio L/C for 132 kV and 400 kV lines are typically 160×103 and 62.5×103 respectively. The neutral three phase loading for two lines will be respectively
(a) 108.9 and 2560 MW
(b) 44 and 2560 MW
(c) 44 and 640 MW
(d) 640 and 44 MW
Answer:

Option (c)

48.
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)

49.
Lightning is a huge spark caused by electric discharge taking place between
(a) Clouds
(b) Within the same cloud
(c) Cloud and earth
(d) Any of above
Answer:

Option (d)

50.
Switching over voltage are more hazardous than lightning surges in case of
(a) Low voltage system
(b) 33 kV system
(c) EHV and UHV system
(d) All of above
Answer:

Option (c)

Showing 41 to 50 out of 106 Questions
2 3 4 5 6 7