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A fuse should have

low melting point
high conductivity
low cost
All of these

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The information to the circuit breaker under fault conditions is provided by

All of these
rewirable fuse
H.R.'only
relay

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The fusing factor is

always more than 1
None of these
always less than 1
always 1

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An overcurrent relay having current settling of 125% is connected to a supply circuit through a current transformer of 400/5 A. The pick-up current is

25 A
12.5 A
3.125 A
6.25 A

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The power loss is an important factor for the design of

motor
feeder
generator
transmission line

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The transient voltage that appears across the contacts at the instant of arc extinction is called

restriking voltage
supply voltage
recovery voltage
peak voltage

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