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? 60 Volts 120 Volts 30 Volts 480 Volts 60 Volts 120 Volts 30 Volts 480 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 eddy current losses Reduce hysteresis loss Reduce copper losses Reduce all above losses Reduce eddy current losses Reduce hysteresis loss Reduce copper losses Reduce all above losses 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.
DGVCL Exam Paper (12-06-2016) kWh meter is the electric meter that measures the amount of electrical _____ in kWh that was consumed in the house. Voltage None of these Current Energy Voltage None of these Current Energy ANSWER DOWNLOAD EXAMIANS APP
DGVCL Exam Paper (12-06-2016) The voltage of transmission can be regulated by Use of tap changing transformers Any of the above methods Switching in shunt capacitors at the receiving end during heavy loads Use of capacitors to neutralize the effect of series reactance Use of tap changing transformers Any of the above methods Switching in shunt capacitors at the receiving end during heavy loads Use of capacitors to neutralize the effect of series reactance ANSWER DOWNLOAD EXAMIANS APP
DGVCL Exam Paper (12-06-2016) A fuse wire should have : Low specific resistance and high melting point High specific resistance and low melting point Low specific resistance and low melting point High specific resistance and high melting point Low specific resistance and high melting point High specific resistance and low melting point Low specific resistance and low melting point High specific resistance and high melting point ANSWER DOWNLOAD EXAMIANS APP
DGVCL Exam Paper (12-06-2016) Reactance relay is used for protection against: None of these Phase fault Earth fault Over voltage fault None of these Phase fault Earth fault Over voltage fault ANSWER DOWNLOAD EXAMIANS APP
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