DGVCL Exam Paper (12-06-2016) What will happen if the primary of a transformer is connected to DC supply? 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 Transformer will operate with high 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) In case the height of transmission tower is increased, which of the following parameter is likely to change? None of these Inductance Resistance Capacitance None of these Inductance Resistance Capacitance ANSWER DOWNLOAD EXAMIANS APP
DGVCL Exam Paper (12-06-2016) The rating of fuse wire is always expressed in _____ Ampere-hours kWh Amperes Ampere-volts Ampere-hours kWh Amperes Ampere-volts ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Equipment :Rating Fuse : AmpereTransformer : kVAAlternator : kVAMotor : kW/HPBattery : ampere-hour
DGVCL Exam Paper (12-06-2016) The following formula is correct: Load factor = Average load for a period + Peak load for the same period All of these Load factor = Average load for a period x Peak load for the same period Load facto r= Average load for a period/Peak load for the same period Load factor = Average load for a period + Peak load for the same period All of these Load factor = Average load for a period x Peak load for the same period Load facto r= Average load for a period/Peak load for the same period ANSWER DOWNLOAD EXAMIANS APP
DGVCL Exam Paper (12-06-2016) A Transformer _____ Changes AC to DC Steps up or down AC Voltages & Current Changes DC to AC Steps up or down DC Voltages & Current Changes AC to DC Steps up or down AC Voltages & Current Changes DC to AC Steps up or down DC Voltages & Current ANSWER DOWNLOAD EXAMIANS APP
DGVCL Exam Paper (12-06-2016) SF₆ gas: Is yellow in colour Is lighter than air Is nontoxic Has pungent smell Is yellow in colour Is lighter than air Is nontoxic Has pungent smell ANSWER DOWNLOAD EXAMIANS APP
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