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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
3.125 A
6.25 A
12.5 A
25 A
3.125 A
6.25 A
12.5 A
25 A
Answer
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The short circuit in any winding of the transformer is the result of
mechanical vibration
loose connection
insulation failure
impulse voltage
mechanical vibration
loose connection
insulation failure
impulse voltage
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Air blast circuit breaker is used for
short duty
over currents
repeated duty
intermittent duty
short duty
over currents
repeated duty
intermittent duty
Answer
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Admittance relay is
impedance relay
None of these
directional relay
non-directional relay
impedance relay
None of these
directional relay
non-directional relay
Answer
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SF6 gas
has pungent small
is nontoxic
is yellow in colour
None of these
is lighter than air
has pungent small
is nontoxic
is yellow in colour
None of these
is lighter than air
Answer
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Series capacitors are used to
compensate for line inductive reactance
improve line voltage
None of these
compensate for line capacitive reactance
compensate for line inductive reactance
improve line voltage
None of these
compensate for line capacitive reactance
Answer
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