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Outdoor switchgear is generally used for voltage beyond
11 kV
132 kV
33 kV
66 kV
11 kV
132 kV
33 kV
66 kV
Answer
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The operating time of a fuse is about
0.8 sec
0.002 sec
1.5 sec
1 sec
0.8 sec
0.002 sec
1.5 sec
1 sec
Answer
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When the circuit breaker operates under fault conditions, the greatest noise is produced in
oil circuit breaker
sf6 circuit breaker
air-blast circuit breaker
vaccum circuit breaker
oil circuit breaker
sf6 circuit breaker
air-blast circuit breaker
vaccum circuit breaker
Answer
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A differential relay measures the vector difference between
two currents
two voltages
two or more similar electrical quantities
None of these
two currents
two voltages
two or more similar electrical quantities
None of these
Answer
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Minimum arcing voltage will be least in case of
carbon
silver
graphite
tungsten
carbon
silver
graphite
tungsten
Answer
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The reflection co-efficient at the open circuited end of a transmission line
unity
infinity
None of these
zero
unity
infinity
None of these
zero
Answer
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