61. With 100 % inductive shunt compensation, the voltage profile is flat for
(a) 100 % loading of line
(b) 50 % loading of line
(c) zero loading of line
(d) none of the above
Ans: c
62. A loss less line terminated with its surge impedance has
(a) flat voltage profile
(b) transmission line angle is greater than actual length of line
(c) transmission line agnle is less than the actual length
(d) both (a) and (b) above
Ans: a
63. For reducing tower footing resistance it is better to Use
(a) chemical and ground rods only
(b) chemical and counterpoise only
(c) ground rod and counterpoise only
(d) chemical, ground rods and counterpoise
Ans: c
64. An RLC series. circuit remains predominantly inductive
(a) at resonance frequency
(b) below resonance frequency
(c) above resonance frequency
(d) at the lower half power frequency
Ans: c
65. The corona loss on a particular system at 50 Hz is 1 kw/phase per km. The corona loss on the same system with supply frequency 25 Hz will be
(a) 1 kW/phase/km
(b) 0.5 kW/phase/km
(c) 0.667 kW/phase/km
(d) none of the above
Ans: c
66. A voltage of 1000 kV is applied to an overhead line with its receiving end open. If the surge impedance of the line is 500 ohm, then the total surge power in the line ill
(a) 2000 MW
(b) 500 MW
(c) 2 MW
(d) 0.5 MW
Ans: a
67. The main criterion for selection of the size of a distribution for a radial distribution system is
(a) voltage drop
(b) corona loss
(c) temperature rise
(d) capital cost
Ans: a
68. If an induction machine is run at above synchromous speed, it acts as
(a) a synchronous motor
(b) an indcution generator
(c) an inductor motor
(d) none of the above
Ans: b
69. The low voltage winding of a 400/230 V, 1-phase, 50 Hz transformer is to be connected to a 25 Hz, the supply voltage should be
(a) 230 V
(b) 460 V
(c) 115 V
(d) 65 V
Ans: c
70. Corona losses are minimized when
(a) conductors size is reduced
(b) smooth conductor is reduced
(c) sharp points are provided in the line hardware
(d) current density in conductors is reduced
Ans: b
Read More Questions:
Power Systems MCQs Part1
Power Systems MCQs Part2
(a) 100 % loading of line
(b) 50 % loading of line
(c) zero loading of line
(d) none of the above
Ans: c
62. A loss less line terminated with its surge impedance has
(a) flat voltage profile
(b) transmission line angle is greater than actual length of line
(c) transmission line agnle is less than the actual length
(d) both (a) and (b) above
Ans: a
63. For reducing tower footing resistance it is better to Use
(a) chemical and ground rods only
(b) chemical and counterpoise only
(c) ground rod and counterpoise only
(d) chemical, ground rods and counterpoise
Ans: c
64. An RLC series. circuit remains predominantly inductive
(a) at resonance frequency
(b) below resonance frequency
(c) above resonance frequency
(d) at the lower half power frequency
Ans: c
65. The corona loss on a particular system at 50 Hz is 1 kw/phase per km. The corona loss on the same system with supply frequency 25 Hz will be
(a) 1 kW/phase/km
(b) 0.5 kW/phase/km
(c) 0.667 kW/phase/km
(d) none of the above
Ans: c
66. A voltage of 1000 kV is applied to an overhead line with its receiving end open. If the surge impedance of the line is 500 ohm, then the total surge power in the line ill
(a) 2000 MW
(b) 500 MW
(c) 2 MW
(d) 0.5 MW
Ans: a
67. The main criterion for selection of the size of a distribution for a radial distribution system is
(a) voltage drop
(b) corona loss
(c) temperature rise
(d) capital cost
Ans: a
68. If an induction machine is run at above synchromous speed, it acts as
(a) a synchronous motor
(b) an indcution generator
(c) an inductor motor
(d) none of the above
Ans: b
69. The low voltage winding of a 400/230 V, 1-phase, 50 Hz transformer is to be connected to a 25 Hz, the supply voltage should be
(a) 230 V
(b) 460 V
(c) 115 V
(d) 65 V
Ans: c
70. Corona losses are minimized when
(a) conductors size is reduced
(b) smooth conductor is reduced
(c) sharp points are provided in the line hardware
(d) current density in conductors is reduced
Ans: b
Read More Questions:
Power Systems MCQs Part1
Power Systems MCQs Part2
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