DGVCL Exam Paper (12-06-2016) A 100-watt light bulb turned on for 8 hours uses : None of these 8 kWh 800 Wh 0.8 kWh None of these 8 kWh 800 Wh 0.8 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) The rating of transformer may be expressed in _____ kVAR kW Horse power kVA kVAR kW Horse power kVA ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Equipment : RatingTransformer : kVAAlternator : kVAMotor : kW/HPBattery : ampere-hour
DGVCL Exam Paper (12-06-2016) Which of the following does not change in a transformer? Frequency All of these Voltage Current Frequency All of these 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) The main advantage of AC over DC is: Conversion flexibility from one voltage level to other All of these AC can be easily converted into DC by using a rectifier AC is easy to maintain & can be easily distributed at long distances Conversion flexibility from one voltage level to other All of these AC can be easily converted into DC by using a rectifier AC is easy to maintain & can be easily distributed at long distances ANSWER DOWNLOAD EXAMIANS APP
DGVCL Exam Paper (12-06-2016) _____ are used where it is necessary to control a circuit by a low power signal. None of these Transformer Relays Electric Motor None of these Transformer Relays Electric Motor 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? 120 Volts 480 Volts 30 Volts 60 Volts 120 Volts 480 Volts 30 Volts 60 Volts ANSWER EXPLANATION DOWNLOAD EXAMIANS APP For transformer, V2/V1 = N2/N1V2/120 = 50/200V2 = 30 V
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