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 Air break circuit breaker Isolator Rewireable fuse Oil Circuit breaker Air break circuit breaker Isolator Rewireable fuse ANSWER DOWNLOAD EXAMIANS APP
DGVCL Exam Paper (12-06-2016) _____ electric power is the most common method used by electrical grids to transfer power Two-phase One-phase Three-phase None of these Two-phase One-phase Three-phase None of these 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 will operate with low efficiency Transformer may start to smoke and burn No effect Transformer will operate with high efficiency Transformer will operate with low efficiency Transformer may start to smoke and burn No effect 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 0.001 sec. 0.1 sec. 0.003 sec. 0.01 sec. 0.001 sec. 0.1 sec. 0.003 sec. 0.01 sec. ANSWER DOWNLOAD EXAMIANS APP
DGVCL Exam Paper (12-06-2016) The main disadvantages of having poor power factors are: High energy loss in conductor Poor voltage regulation High cost of station and distribution equipment All of these High energy loss in conductor Poor voltage regulation High cost of station and distribution equipment All of these ANSWER DOWNLOAD EXAMIANS APP
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