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For the same power, the least size is of
vaccum circuit breaker
sf6 circuit breaker
air-blast circuit breaker
oil circuit breaker
vaccum circuit breaker
sf6 circuit breaker
air-blast circuit breaker
oil circuit breaker
Answer
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The making capacity of a circuit breaker is equal to
√3 × symmetrical breaking capacity
None of these
2.55 × symmetrical breaking capacity
√2 × symmetrical breaking capacity
√3 × symmetrical breaking capacity
None of these
2.55 × symmetrical breaking capacity
√2 × symmetrical breaking capacity
Answer
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Distance relays are generally
impedance relays
none of these
split-phase relays
reactance relays
impedance relays
none of these
split-phase relays
reactance relays
Answer
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A fuse element is generally made of
brass
steel
silver
iron
brass
steel
silver
iron
Answer
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HRC fuses provide best protection against
short circuits
open circuits
reverse current
overload
short circuits
open circuits
reverse current
overload
Answer
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Current chopping mainly occurs in
sf 6 circuit breaker
vaccum circuit breaker
oil circuit breaker
air-blast circuit breaker
sf 6 circuit breaker
vaccum circuit breaker
oil circuit breaker
air-blast circuit breaker
Answer
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