DGVCL Exam Paper (12-06-2016) The core construction is like spokes of a wheel in following transformer: Shell Type Transformer Core Type Transformer None of these Berry Type Transformer Shell Type Transformer Core Type Transformer None of these Berry Type Transformer ANSWER DOWNLOAD EXAMIANS APP
DGVCL Exam Paper (12-06-2016) The SI unit of energy is : Coulomb Henry Newton Joule Coulomb Henry Newton Joule ANSWER DOWNLOAD EXAMIANS APP
DGVCL Exam Paper (12-06-2016) Which of the following does not change in a transformer? All of these Frequency Voltage Current All of these Frequency Voltage Current ANSWER EXPLANATION DOWNLOAD EXAMIANS APP In transformer voltage and current can be raised or lowered.Frequency remains samePower and Flux remains almost constant.
DGVCL Exam Paper (12-06-2016) In India _____ supply is 415 V supply through 4-wires. None of these Two-phase Three - phase Single - phase None of these Two-phase Three - phase Single - phase ANSWER DOWNLOAD EXAMIANS APP
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.
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? 120 Volts 480 Volts 60 Volts 30 Volts 120 Volts 480 Volts 60 Volts 30 Volts ANSWER EXPLANATION DOWNLOAD EXAMIANS APP For transformer, V2/V1 = N2/N1V2/120 = 50/200V2 = 30 V
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