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Dc shunt relays are made of
many turns of thick wire
few turns of thick wire
many turns of thin wire
few turns of thin wire
many turns of thick wire
few turns of thick wire
many turns of thin wire
few turns of thin wire
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Wave trap is used to trap waves of
either of the above
None of these
power frequencies
higher frequencies entering generator or transformer units
either of the above
None of these
power frequencies
higher frequencies entering generator or transformer units
Answer
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The reflection co-efficient at the open circuited end of a transmission line
infinity
None of these
unity
zero
infinity
None of these
unity
zero
Answer
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For interrupting of high voltage and low current, the circuit breaker prefered is
air-blast circuit breaker
oil circuit breaker
vaccum circuit breaker
all are correct
air-blast circuit breaker
oil circuit breaker
vaccum circuit breaker
all are correct
Answer
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A short-circuit is identified by
voltage rise
heavy current flow
voltage drop
no current flow
voltage rise
heavy current flow
voltage drop
no current flow
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If the length of the arc in a circuit breaker increases, its resistance
remains same
increases
None of these
decreases
remains same
increases
None of these
decreases
Answer
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