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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
short-circuit and overload
overload
open circuit, short-circuit and overload
None of these
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Arc in a circuit breaker is interrupted at
minimum voltage
maximum current
zero current
maximum voltage
minimum voltage
maximum current
zero current
maximum voltage
Answer
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For the same power, the least size is of
oil circuit breaker
vaccum circuit breaker
air-blast circuit breaker
sf6 circuit breaker
oil circuit breaker
vaccum circuit breaker
air-blast circuit breaker
sf6 circuit breaker
Answer
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The transient voltage that appears across the contacts at the instant of arc extinction is called
restriking voltage
supply voltage
recovery voltage
peak voltage
restriking voltage
supply voltage
recovery voltage
peak voltage
Answer
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The information to the circuit breaker under fault conditions is provided by
All of these
relay
rewirable fuse
H.R.'only
All of these
relay
rewirable fuse
H.R.'only
Answer
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A.C. network analyzer is used to solve problems of
Load flow and stability
Load flow, short-circuit and stability
Load flow and short-circuit
Load flow
Load flow and stability
Load flow, short-circuit and stability
Load flow and short-circuit
Load flow
Answer
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