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TRANSMISSION & DISTRIBUTION

Transmission & Distribution
The underground system cannot be operated above

11 V
33 V
440 V
66 V

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Transmission & Distribution
For transmission of power over a distance of 500 km, the transmission voltage should be in the range

100 to 120 kV
60 to 100 kV
150 to 220 kV
20 to 50 kV

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Transmission & Distribution
Which of the following D.C. distribution system is the simplest and lowest in first cost?

None of these
Ring system
Radial system
Interconnected system

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Transmission & Distribution
The spacing between phase conductors of a 220 kV line is approximately equal to

2 m
3.5 m
6 m
8.5 m

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Transmission & Distribution
The skin effect of a conductor will reduce as the

Frequency increases
Resistivity of conductor material increases
Diameter increases
Permeability of conductor material increases

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