DGVCL Exam Paper (12-06-2016) Reactance relay is used for protection against: None of these Earth fault Over voltage fault Phase fault None of these Earth fault Over voltage fault Phase fault ANSWER DOWNLOAD EXAMIANS APP
DGVCL Exam Paper (12-06-2016) The SI unit of energy is : Coulomb Newton Joule Henry Coulomb Newton Joule Henry ANSWER DOWNLOAD EXAMIANS APP
DGVCL Exam Paper (12-06-2016) The main advantage of AC over DC is: 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 Conversion flexibility from one voltage level to other ANSWER DOWNLOAD EXAMIANS APP
DGVCL Exam Paper (12-06-2016) The rating of fuse wire is always expressed in _____ Ampere-volts Ampere-hours Amperes kWh Ampere-volts Ampere-hours Amperes kWh ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Equipment :Rating Fuse : AmpereTransformer : kVAAlternator : kVAMotor : kW/HPBattery : ampere-hour
DGVCL Exam Paper (12-06-2016) What would happen if a power transformer designed for operation on 50 Hz (frequency) were connected to a 500 Hz (frequency) source of the same voltage: Current will be too much high No effect Transformer may start to smoke and burn Eddy Current and Hysteresis losses will be excessive Current will be too much high No effect Transformer may start to smoke and burn Eddy Current and Hysteresis losses will be excessive ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Core loss of transformer = Hysteresis loss + eddy current lossHysteresis loss prpotional to feddy current loss prpotional to f².
DGVCL Exam Paper (12-06-2016) Which of the following is the least expensive protection for over current in low voltage system? Isolator Air break circuit breaker Rewireable fuse Oil Circuit breaker Isolator Air break circuit breaker Rewireable fuse Oil Circuit breaker ANSWER DOWNLOAD EXAMIANS APP
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