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Transmission & Distribution

Transmission & Distribution
Skin effect is noticeable only at _____ frequencies.

Audio
All
Low
High

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Transmission & Distribution
The cause of damage to the lead sheath of a cable is

chemical action on the lead when buried in the earth
crystallisation of the lead through vibration
all of these
mechanical damage

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Transmission & Distribution
Voltage of primary distribution system is

400 V
33 kV
11 kV
230 V

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Transmission & Distribution
In a 3- phase balanced load, each phase has

Same p. f. But different impedance
Same impedance and p. f.
Same impedance but different p. f
None of the listed here

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Transmission & Distribution
The usual span with RCC Poles are

800-100 meters
40-50 meters
60-100 meters
300-500 meters

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Transmission & Distribution
The colour of the neutral of three core flexible cable is

Black
Red
Blue
Brown

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