Power system MCQ #13
Power system MCQ 181 to 176:
181) The insulation may fail due to
181) The insulation may fail due to
(a) deposition
of dust
(b)
short-circuit
(c) flashover
(d) all
of the above
182) The effect of wind pressure is more predominant on
(a) transmission
lines
(b) supporting
towers
(c) insulators
(d) none
of the above
183) The sag of transmission line conductor in summer is
(a) more
than that in winter
(b) less
than that in winter
(c) same
as winter
(d)
cannot predict
184) For a 400kV transmission line, the spacing between
phase conductor is around
(a) 8 m
(b) 11 m
(c) 14 m
(d) 17 m
ANSWER: |181-d | 182-b | 183-a | 184-a |
Power system MCQ 185 to 188:
Power system MCQ 185 to 188:
185) The string efficiency of a high voltage transmission
is around
(a) 100%
(b) 80%
(c) 40%
(d) 10%
186) Skin effect depends on
(a) supply
frequency
(b) cross
section of conductor
(c)
permeability of conductor material
(d) all
of the above
187) The chances of occurrence of corona is more in
(a) winter
(b) dry
weather
(c) humid
weather
(d) hot
summer
188) The corona is affected by
(a) size
of conductor
(b) shape
and surface conduction of the conductor
(c)
operating voltage
(d) all
of the above
ANSWER: | 185-b | 186-d | 187-c | 188-d |
Power system MCQ 189 to 192:
Power system MCQ 189 to 192:
189) Equivalent PI model of transmission line is suitable
for analysis of the performance of _____ km transmission line.
(a) 50
(b) 150
(c) 250
(d) 10
190) Capacitance in equivalent circuit of a transmission
line is due to
(a) difference
in potential of line
(b) current
in the line
(c)
leakage of current
(d)
presence of magnetic flux
191) Ferranti effect happens in transmission line when the
line is
(a) long
and loaded
(b) short
and loaded
(c) long
and unloaded
(d) none
of these
192) The value of A, B, C and D constants for a short
transmission line are respectively
(a) Z, 0,
1 and 1
(b) 0, 1,
1 and Z
(c) 1, Z,
0 and 1
(d) 1, 1,
Z and 0
ANSWER: | 189-c | 190-a | 191-c | 192-c |
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To download this MCQ click below link
Power system MCQ PDF #13
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To download this MCQ click below link
Power system MCQ PDF #13
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