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A.C. network analyzer is used to solve problems of
Load flow
Load flow, short-circuit and stability
Load flow and stability
Load flow and short-circuit
Load flow
Load flow, short-circuit and stability
Load flow and stability
Load flow and short-circuit
Answer
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The normal current in a power line is 100 A. If a short-circuit fault occurs on the line, then one can expect the short-circuit current to be
more than 1000 A
100 A
300 A
200 A
more than 1000 A
100 A
300 A
200 A
Answer
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Dc shunt relays are made of
few turns of thin wire
few turns of thick wire
many turns of thin wire
many turns of thick wire
few turns of thin wire
few turns of thick wire
many turns of thin wire
many turns of thick wire
Answer
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The arc voltage produced in AC circuit breaker is always
None of these
lagging the arc current by 90°
leading the arc current by 90°
In phase with the arc current
None of these
lagging the arc current by 90°
leading the arc current by 90°
In phase with the arc current
Answer
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The voltage appearing across the contacts after opening of the circuit breaker is called
operating voltage
surge voltage
arc voltage
recovery voltage
operating voltage
surge voltage
arc voltage
recovery voltage
Answer
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For interrupting of high voltage and low current, the circuit breaker prefered is
all are correct
oil circuit breaker
air-blast circuit breaker
vaccum circuit breaker
all are correct
oil circuit breaker
air-blast circuit breaker
vaccum circuit breaker
Answer
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