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A short-circuit is identified by

voltage rise
voltage drop
no current flow
heavy current flow

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Air blast circuit breaker is used for

over currents
repeated duty
intermittent duty
short duty

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A fuse in a motor circuit provides protection against

short-circuit and overload
overload
open circuit, short-circuit and overload
None of these

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The fuse rating is expressed in terms of

voltage
current
VAR
kVA

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The reflection co-efficient at the open circuited end of a transmission line

zero
None of these
infinity
unity

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In Railway applications ______ circuit breaker is used.

bulk oil
minimum oil
SFe
air break

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