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A fuse should have

low melting point
low cost
high conductivity
All of these

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A.C. network analyzer is used to solve problems of

Load flow, short-circuit and stability
Load flow
Load flow and stability
Load flow and short-circuit

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Breaking capacity of a circuit breaker is usually expressed in terms of

MVA
amperes
Mw
volts

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The pick-up current of a relay is 7.5 A and the fault current in relay is 30 A. Its plug-setting multiplier (P.S.M.) is

4
6
8
2

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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

12.5 A
3.125 A
25 A
6.25 A

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The fuse rating is expressed in terms of

kVA
VAR
current
voltage

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