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The fault that imposes severest duty on the circuit breaker is
all three lines short-circuited
line to line fault
two lines to ground fault
line to ground fault
all three lines short-circuited
line to line fault
two lines to ground fault
line to ground fault
Answer
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Insulation resistance of high voltage circuit breakers is more than
100 mega ohms
1 mega ohms
500 mega ohms
10 mega ohms
100 mega ohms
1 mega ohms
500 mega ohms
10 mega ohms
Answer
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SF 6 gas
has pungent small
Is nontoxic
is lighter than air
is yellow in colour
has pungent small
Is nontoxic
is lighter than air
is yellow in colour
Answer
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Dc shunt relays are made of
few turns of thin wire
many turns of thick wire
few turns of thick wire
many turns of thin wire
few turns of thin wire
many turns of thick wire
few turns of thick wire
many turns of thin wire
Answer
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The fusing factor is
None of these
always less than 1
always 1
always more than 1
None of these
always less than 1
always 1
always more than 1
Answer
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To protect most of the electrical equipment handling low power, the types of relays used are
Thermocouple
Electronic and bimetallic
None of these
Both of the listed here
Thermocouple
Electronic and bimetallic
None of these
Both of the listed here
Answer
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