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DGVCL Exam Paper (12-06-2016)

DGVCL Exam Paper (12-06-2016)
The number of cycles in which a high speed circuit breaker can complete its operation is

20 to 30
40 to 50
10 to 18
3 to 8

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DGVCL Exam Paper (12-06-2016)
Efficiency of a power transformer is of the order of :

1
0.98
0.5
0.25

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DGVCL Exam Paper (12-06-2016)
Which of the following does not change in a transformer?

Current
All of these
Voltage
Frequency

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

In transformer voltage and current can be raised or lowered.
Frequency remains same
Power and Flux remains almost constant.

DGVCL Exam Paper (12-06-2016)
For 11 kV line the capacitance per km per phase will be of the order of:

1 Farad
0.01 Farad
0.1 Farad
0.01 microF

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DGVCL Exam Paper (12-06-2016)
The relay operating speed depends upon

The spring tension
The rate of flux built up
Armature core air gap
All of these

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DGVCL Exam Paper (12-06-2016)
Directional relays are based on flow of

All of these
Voltage
Power
Current

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MORE MCQ ON DGVCL Exam Paper (12-06-2016)

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