DGVCL Exam Paper (12-06-2016) What will happen if the primary of a transformer is connected to DC supply? Transformer may start to smoke and burn Transformer will operate with low efficiency No effect Transformer will operate with high efficiency Transformer may start to smoke and burn Transformer will operate with low efficiency No effect Transformer will operate with high 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 friction losses in Real Transformers are : 0.25 0.5 0.05 0 0.25 0.5 0.05 0 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP As there is no rotating part in transformer, there is no friction and windage loss
DGVCL Exam Paper (12-06-2016) The main objectives in framing tariff are: Tariffs can be modified from time to time The tariff must be equitable amongst different consumers The consumers must readily understand the tariffs All of these Tariffs can be modified from time to time The tariff must be equitable amongst different consumers The consumers must readily understand the tariffs All of these ANSWER DOWNLOAD EXAMIANS APP
DGVCL Exam Paper (12-06-2016) Wave trap is used to trap waves of: Power frequencies None of these Higher frequencies entering generator or transformer units All of these Power frequencies None of these Higher frequencies entering generator or transformer units All of these ANSWER DOWNLOAD EXAMIANS APP
DGVCL Exam Paper (12-06-2016) As per Electricity Act, _____ means a process which simultaneously produces two or more forms of useful energy (including electricity). None of these Captive Power Plant Power generation Cogeneration None of these Captive Power Plant Power generation Cogeneration ANSWER DOWNLOAD EXAMIANS APP
DGVCL Exam Paper (12-06-2016) The acting contacts for a circuit breakers are made of : Porcelain Hard-pressed carbon Stainless Steel Copper Tungsten alloy Porcelain Hard-pressed carbon Stainless Steel Copper Tungsten alloy ANSWER DOWNLOAD EXAMIANS APP
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