Power System - II (3150911) MCQs

MCQs of Transients in Power Systems

Showing 31 to 40 out of 106 Questions
1 2 3 4 5 6
31.
Characteristic impedance of transmission line depends upon
(a) Shape of the conductor
(b) Conductivity of the conductor material
(c) Geometrical configuration of the conductor
(d) None of above
Answer:

Option (c)

32.
In case the characteristic impedance of a transmission line is equal to the load impedance
(a) The system will resonate badly
(b) All the energy sent will be absorbed by the load
(c) All the energy sent will pass to the earth
(d) All the energy will be lost in transmission line as transmission losses
Answer:

Option (b)

33.
In a transmission line of negligible resistance , the surge impedance will be
(a) √(L/C)
(b) √(C/L)
(c) 1/√(LC)
(d) √(LC)
Answer:

Option (a)

34.
Surge impedance of a  transformer is in the range of
(a) 80 to 100 Ω
(b) 400 to 500 Ω
(c) 1000 to 2000 Ω
(d) None of above
Answer:

Option (c)

35.
Characteristic impedance of an overhead transmission line is usually in the range of
(a) 100 to 200 Ω
(b) 200 to 300 Ω
(c) 0 to 100 Ω
(d) 400 to 500 Ω
Answer:

Option (d)

36.
The Surge impedance of 400 km long overhead transmission line is 400 Ω. For 200 km length of the same line the Surge impedance will be
(a) 200 Ω
(b) 800 Ω
(c) 400 Ω
(d) 100 Ω
Answer:

Option (c)

37.
Surge impedance values for cables are
(a) Higher than those of overhead lines
(b) Lower than those of overhead lines
(c) In a same order is those of overhead line
(d) None of above
Answer:

Option (b)

38.
Multiple conductor lines have
(a) Lower surge impedance than single line conductor
(b) Higher surge impedance than single line conductor
(c) Higher surge impedance than single line conductor for short length
(d) Higher surge impedance than single line conductor for medium length
Answer:

Option (a)

39.
For distortion less transmission line
(a) RL = GC
(b) RC = GL
(c) RG = LC
(d) RLGC = 0
Answer:

Option (b)

40.
The propagation constant of a transmission line is given as
(a) jω√ LC
(b) j√LC
(c) j√L/C
(d) jω√C/L
Answer:

Option (a)

Showing 31 to 40 out of 106 Questions
1 2 3 4 5 6