DGVCL Exam Paper (12-06-2016) Which of the following is the least expensive protection for over current in low voltage system? Oil Circuit breaker Isolator Rewireable fuse Air break circuit breaker Oil Circuit breaker Isolator Rewireable fuse Air break circuit breaker ANSWER DOWNLOAD EXAMIANS APP
DGVCL Exam Paper (12-06-2016) _____ electric power is the most common method used by electrical grids to transfer power One-phase Two-phase None of these Three-phase One-phase Two-phase None of these Three-phase ANSWER DOWNLOAD EXAMIANS APP
DGVCL Exam Paper (12-06-2016) What will happen if the primary of a transformer is connected to DC supply? Transformer will operate with high efficiency Transformer may start to smoke and burn No effect Transformer will operate with low efficiency Transformer will operate with high efficiency Transformer may start to smoke and burn No effect Transformer will operate with low efficiency ANSWER EXPLANATION DOWNLOAD EXAMIANS APP transformer works on principle of faraday's law of electromagnetic induction. So if D.C supply use, no indction are produced and due to this E.M.F not induced in winding and transfer of electrical energy is not possible.
DGVCL Exam Paper (12-06-2016) The time of closing the cycle, in modern circuit breakers is 0.01 sec. 0.001 sec. 0.003 sec. 0.1 sec. 0.01 sec. 0.001 sec. 0.003 sec. 0.1 sec. ANSWER DOWNLOAD EXAMIANS APP
DGVCL Exam Paper (12-06-2016) The main disadvantages of having poor power factors are: High cost of station and distribution equipment High energy loss in conductor All of these Poor voltage regulation High cost of station and distribution equipment High energy loss in conductor All of these Poor voltage regulation ANSWER DOWNLOAD EXAMIANS APP
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