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For the protection of power station buildings against direct strokes the requirements are
interception and conduction
interception, conduction, dissipation and reflection
interception
None of these
interception, conduction and dissipation
interception and conduction
interception, conduction, dissipation and reflection
interception
None of these
interception, conduction and dissipation
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The time-current graph of a fuse
has inverse characteristic
has a linear characteristic
is a circle
None of these
has inverse characteristic
has a linear characteristic
is a circle
None of these
Answer
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The fault that imposes severest duty on the circuit breaker is
line to ground fault
two lines to ground fault
all three lines short-circuited
line to line fault
line to ground fault
two lines to ground fault
all three lines short-circuited
line to line fault
Answer
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A fuse element is generally made of
silver
steel
iron
brass
silver
steel
iron
brass
Answer
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In a circuit breaker the time duration from the instant of the fault to extinction of arc is known as
clearing time
lead time
operation time
lag time
clearing time
lead time
operation time
lag time
Answer
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The information to the circuit breaker under fault conditions is provided by
rewirable fuse
relay
H.R.'only
All of these
rewirable fuse
relay
H.R.'only
All of these
Answer
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