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The relay operating speed depends upon
the spring tension
All of these
armature core air gap
the rate of flux built up
the spring tension
All of these
armature core air gap
the rate of flux built up
Answer
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Related Question
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SF 6 gas
Is nontoxic
is yellow in colour
has pungent small
is lighter than air
Is nontoxic
is yellow in colour
has pungent small
is lighter than air
Answer
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The relay operating coil is supplied through
None of these
power transformer
current transformer
fuse
None of these
power transformer
current transformer
fuse
Answer
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When a fault occur in a power system, the circuit breaker
opens automatically
None of these
is opened by remote control
is opened manually
opens automatically
None of these
is opened by remote control
is opened manually
Answer
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For interrupting of high voltage and low current, the circuit breaker prefered is
all are correct
oil circuit breaker
air-blast circuit breaker
vaccum circuit breaker
all are correct
oil circuit breaker
air-blast circuit breaker
vaccum circuit breaker
Answer
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The fault that imposes severest duty on the circuit breaker is
two lines to ground fault
line to line fault
line to ground fault
all three lines short-circuited
two lines to ground fault
line to line fault
line to ground fault
all three lines short-circuited
Answer
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