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Transmission & Distribution

Transmission & Distribution
In a 3 wire dc system, the current in +ve outer is 200 A and in the -ve outer is 100 A. The current in the neutral wire is

200 A
100 A
300 A
0 A

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Transmission & Distribution
Solid grounding is adopted for voltages below

100 V
400 V
660 V
200 V

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Transmission & Distribution
Power system stability is least affected by

Reactance of transmission line
Input torque
Losses
Reactance of generator

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Transmission & Distribution
The angular displacement between two interconnected stations is mainly due to

Reactance of the interconnector
All of these
Synchronous reactance of both the alternators
Armature reactance of both alternators

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Transmission & Distribution
The wooden poles well impregnated with creosote oil or any preservative compound has life

60 to 70 years
25 to 30 years
10 to 15 years
From 2 to 5 years

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Transmission & Distribution
The surge resistance of cables is

200 ohms
50 ohms
300 ohms
20 ohms

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