DGVCL Exam Paper (12-06-2016) The kVA rating of Three-phase transformer with Voltage = 200 V and Current = 100 A will be : 75 kVA 20 kVA None of these 34.64 kVA 75 kVA 20 kVA None of these 34.64 kVA ANSWER EXPLANATION DOWNLOAD EXAMIANS APP For three phase,VA = √3 V IFor single phase, kVA = V I
DGVCL Exam Paper (12-06-2016) Step-down transformer converts high voltage and low current into: How voltage and high current Low voltage and high current None of these High voltage and low current How voltage and high current Low voltage and high current None of these High voltage and low current ANSWER EXPLANATION DOWNLOAD EXAMIANS APP In step up votlage,Output votlage > Input votlageOutput current < Input currentIn step down transformerOutput votlage < Input votlageOutput current > Input current.Power and frequency remains almost constant in stepup or stepdown transformer.
DGVCL Exam Paper (12-06-2016) Directional relays are based on flow of Voltage Current All of these Power Voltage Current All of these Power ANSWER DOWNLOAD EXAMIANS APP
DGVCL Exam Paper (12-06-2016) The registered office of MGVCL is in _____ Valsad Godhra Vadodara Ahmedabad Valsad Godhra Vadodara Ahmedabad ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Company : Registered OffficePGVCL : RajkotMGVCL : VadodaraDGVCL : SuratUGVCL : MehsanaGETCO : VadodaraGUVNL : Vadodara
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? 30 Volts 60 Volts 120 Volts 480 Volts 30 Volts 60 Volts 120 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) The voltage of transmission can be regulated by Any of the above methods Use of tap changing transformers Use of capacitors to neutralize the effect of series reactance Switching in shunt capacitors at the receiving end during heavy loads Any of the above methods Use of tap changing transformers Use of capacitors to neutralize the effect of series reactance Switching in shunt capacitors at the receiving end during heavy loads ANSWER DOWNLOAD EXAMIANS APP
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