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Transmission & Distribution

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

6 m
8.5 m
2 m
3.5 m

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Transmission & Distribution
In a supply system, the cost of conductor is

Directly proportional to sqaure of area of cross section
Inveresely proportional to area of cross-section
None of the listed here
Directly proportional to area of cross section

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Transmission & Distribution
The steel used in steel cored conductors is usually

Alloy steel
High speed steel
Mild steel
Stainless steel

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Transmission & Distribution
In a distribution system major cost is that of

Distribution transformer
Conductors
Earthing system
Meters

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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
On which of the following does the size of a feeder depend?

Voltage drop
Frequency
Voltage
Current carrying capacity

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