"Mechanical MCQ Question"

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"QATAR UPDA/MMUP ENGINEERS REGISTRATION PROCESS"

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"ELECTRICAL QUESTION"

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Hi any questions mail me on jawedenc@gmail.com Sign up Loading... Electrical Question : ELECTRICAL QUESTION 1. A circuit breaker is (A) power factor correcting device (B) a device to neutralize the effect of transients (C) a waveform correcting device (D) a current interrupting device. Get Answer:   D 2. The function of protective relay in a circuit breaker is (A) to each any stray voltages (B) to close the contacts when the actuating quantity reaches a certain predetermined value (C) to limit arcing current during the operation of circuit breaker (D) to provide additional safety in the operation of circuit breaker. Get Answer:   B 3. Low voltage circuit breakers have rated voltage of less than (A) 220 V (B) 400V (C) 1000 V (D) 10,000 V. C 4. The fault clearing time of a circuit breaker is usually (A) few minutes (B) few seconds (C) one second (D) few cycles of supply voltage. D 5. The medium employed for extinction of arc in a...
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