Power System Planning and Design (2180903) MCQs

MCQs of Transmission Line Design

Showing 71 to 80 out of 85 Questions
5 6 7 8 9
71.
In the modelling of short length overhead transmission line, line capacitance to ground neglected because
(a) It is equal to zero
(b) It is finite but very small
(c) It is finite but very large
(d) It is infinite
Answer:

Option (b)

72.
In a short transmission line, voltage regulation is zero when the power factor angle of the load at the receiving end side is equal to
(a) tan-1(X/R)
(b) tan-1(R/X)
(c) tan-1(R/Z)
(d) tan-1(X/Z)
Answer:

Option (b)

73.
For a short line if the receiving end voltage is equal to sending end voltage under loaded conditions then
(a) Sending end power factor is unity
(b) Sending end power factor is leading
(c) Receiving end power factor is unity
(d) Receiving end power factor is leading
Answer:

Option (d)

74.
Line length of medium transmission line is
(a) 50 – 150 km
(b) 90 – 100 km
(c) 150 – 200 km
(d) More than 200 km
Answer:

Option (a)

75.
Modelling of medium transmission line is carried out by
(a) T-method
(b) π-method
(c) End condenser method
(d) All of above
Answer:

Option (d)

76.
In the nominal π-method,_________________ is divided into two halves
(a) Series resistance
(b) Series inductance
(c) Shunt capacitance
(d) None of above
Answer:

Option (c)

77.
Line length of long transmission line is
(a) 50 – 150 km
(b) 90 – 100 km
(c) 150 – 200 km
(d) More than 200 km
Answer:

Option (d)

78.
Long transmission lines under no load has
(a) Receiving end voltage < Sending end voltage
(b) Sending end voltage < Receiving end voltage
(c) Sending end voltage = Receiving end voltage
(d) None of above
Answer:

Option (b)

79.
Transmission efficiency of line increases with the
(a) Decrease in power factor and voltage
(b) Increase in power factor and voltage
(c) Increase in power factor but decrease in voltage
(d) Increase in voltage and decrease in power factor
Answer:

Option (b)

80.
Transmission lines are transposed to
(a) Reduce corona loss
(b) Reduce skin effect
(c) Reduce interference with telephone lines
(d) Prevent short circuit between any two lines
Answer:

Option (c)

Showing 71 to 80 out of 85 Questions
5 6 7 8 9