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The fuse wire, in DC circuit, is inserted in
positive circuit only
None of these
Both positive and negative circuit
negative circuit only
positive circuit only
None of these
Both positive and negative circuit
negative circuit only
Answer
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Wave trap is used to trap waves of
power frequencies
either of the above
higher frequencies entering generator or transformer units
None of these
power frequencies
either of the above
higher frequencies entering generator or transformer units
None of these
Answer
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If the fault occurs near the impedance relay, the V/ I ratio will be
Lower than that of if fault occurs away from the relay
None of these
higher than that of if fault occurs away from the relay
constant for all distances
Lower than that of if fault occurs away from the relay
None of these
higher than that of if fault occurs away from the relay
constant for all distances
Answer
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Which of the following is used in liquid fuses ?
distilled water
sulphur hexafluoride
carbon tetrachloride
transformer oil
distilled water
sulphur hexafluoride
carbon tetrachloride
transformer oil
Answer
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An isolator is designed to open a circuit under
None of these
no load
normal conditions
full load
None of these
no load
normal conditions
full load
Answer
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If the length of the arc in a circuit breaker increases, its resistance
None of these
decreases
increases
remains same
None of these
decreases
increases
remains same
Answer
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