DGVCL Exam Paper (12-06-2016) A 100-watt light bulb turned on for 8 hours uses : None of these 0.8 kWh 800 Wh 8 kWh None of these 0.8 kWh 800 Wh 8 kWh ANSWER EXPLANATION DOWNLOAD EXAMIANS APP In Solution 0.8 kWh and 800 Wh both options are given as answer as both are correct
DGVCL Exam Paper (12-06-2016) Reactance relay is used for protection against: Over voltage fault Earth fault Phase fault None of these Over voltage fault Earth fault Phase fault None of these ANSWER DOWNLOAD EXAMIANS APP
DGVCL Exam Paper (12-06-2016) Which of the following is not a part of transformer installation? Exciter Conservator Breather Buchholz Relay Exciter Conservator Breather Buchholz Relay ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Exciter is used in alternator for field supply.
DGVCL Exam Paper (12-06-2016) The acting contacts for a circuit breakers are made of : Copper Tungsten alloy Hard-pressed carbon Porcelain Stainless Steel Copper Tungsten alloy Hard-pressed carbon Porcelain Stainless Steel ANSWER DOWNLOAD EXAMIANS APP
DGVCL Exam Paper (12-06-2016) A certain transformer has 200 turns in the primary winding, 50 turns in the secondary winding and 120 volts applied to the primary. What is the voltage across the secondary? 480 Volts 120 Volts 60 Volts 30 Volts 480 Volts 120 Volts 60 Volts 30 Volts ANSWER EXPLANATION DOWNLOAD EXAMIANS APP For transformer, V2/V1 = N2/N1V2/120 = 50/200V2 = 30 V
DGVCL Exam Paper (12-06-2016) Transformer core is laminated to _____ Reduce all above losses Reduce copper losses Reduce eddy current losses Reduce hysteresis loss Reduce all above losses Reduce copper losses Reduce eddy current losses Reduce hysteresis loss ANSWER EXPLANATION DOWNLOAD EXAMIANS APP To reduce eddy current loss laminations is done.To reduce hysteresis loss good magnetic material (whose specific hysterisis loss is low) is used.
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