Transmission and distribution Archives

81. The voltage of the single phase supply to residential consumers is

110 V

210 V

230 V

400 V

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82. Most of the high voltage transmission lines in India are

Underground

Overhead

Either of the above

None of the above

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83. Besides a method of trial and error, which of the following methods is employed for solution of network problems in interconnected system?

Circulating current method

Thevenin's theorem

Superposition of currents

All of the above

Detailed SolutionBesides a method of trial

and error, which of the following methods is employed for solution of network problems in interconnected system?

84. The voltage drop, for constant voltage transmission is compensated by installing

Inductors

Capacitors

Synchronous motors

All of above

Detailed

Solution

85. Large industrial consumers are supplied electrical energy at

400 V

11 kV

66 kV

400 kV

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86. The spacing between phase conductors of a 220 kV line is approximately equal to

2 m

3.5 m

6 m

8.5 m

Detailed SolutionThe spacing between

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phase conductors of a 220 kV line is approximately equal to

87. The current drawn by the line due to corona losses is

Non-sinusoidal

Sinusoidal

Triangular

Square

Detailed

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Solution

88. The skin effect of a conductor will reduce as the

Resistivity of conductor material increases

Permeability of conductor material increases

Diameter increases

Frequency increases

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89. In AC.S.R. Conductors, the insulation between aluminium and steel conductors is

Insulin

Bitumen

Varnish

No insulation is required

Detailed SolutionIn

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AC.S.R. Conductors, the insulation between aluminium and steel conductors is

90. Series capacitors on transmission lines are of little use when the load VAR requirement is

Large

Small

Fluctuating

Any of the above

Detailed SolutionSeries capacitors on

transmission lines are of little use when the load VAR requirement is

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