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HRC fuses provide best protection against

overload
short circuits
open circuits
reverse current

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series reactors should have

low resistance
low impedance
high resistance
high impedance

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The operating time of a circuit breaker is

0.002 sec
0.2 sec
0.05 sec
0.001 sec

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SF 6 gas

has pungent small
is yellow in colour
Is nontoxic
is lighter than air

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The power loss is an important factor for the design of

generator
transmission line
feeder
motor

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For interrupting of high voltage and low current, the circuit breaker prefered is

air-blast circuit breaker
all are correct
vaccum circuit breaker
oil circuit breaker

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