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protection of fuses is generally not used beyond

200 A
100 A
50 A
20 A

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The rate of rise of restriking voltage depends on

both inductance and capacitance of the system
the capacitance of the system only
the type of circuit breaker
the inductance of the system only

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In a circuit breaker the time duration from the instant of the fault to extinction of arc is known as

clearing time
lead time
lag time
operation time

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A _______ is used to measure the stator % winding temperature of the generator.

resistance thermometer
pyrometer
thermometer
thermocouple

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In a single bus-bar system there will be complete shut down when

fault occurs on neutral line
fault occurs with respect to earthing
fault occurs on the bus itself
two or more faults occur simultaneously

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The single phasing relays are used for the protection of

two phase motors only
two single phase motors running in parallel
single phase motors only
three phase motors

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