DGVCL Exam Paper (12-06-2016) The time of closing the cycle, in modern circuit breakers is 0.1 sec. 0.001 sec. 0.01 sec. 0.003 sec. 0.1 sec. 0.001 sec. 0.01 sec. 0.003 sec. ANSWER DOWNLOAD EXAMIANS APP
DGVCL Exam Paper (12-06-2016) The following is/are the characteristics of SF₆ circuit breakers: None of these Short break time of 2 to 2.5 cycles All of these It does not need an auxiliary breaking chamber None of these Short break time of 2 to 2.5 cycles All of these It does not need an auxiliary breaking chamber ANSWER DOWNLOAD EXAMIANS APP
DGVCL Exam Paper (12-06-2016) About how many times longer would a 10 watt light bulb be able to burn compared to a 100 watt bulb with the same energy? 100 times longer 10 times longer None of these Same time 100 times longer 10 times longer None of these Same time ANSWER DOWNLOAD EXAMIANS APP
DGVCL Exam Paper (12-06-2016) The following is correct : P = V²/R All of these P = VxI P = I²xR P = V²/R All of these P = VxI P = I²xR ANSWER EXPLANATION DOWNLOAD EXAMIANS APP True for DC Circuits.For single pahse ac P = V I CosØ
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: 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 Current will be too much high No effect 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) In a transmission line if booster transformers are to be used, preferred location will be At the intermediate point At the sending end At the receiving end Anywhere in the line At the intermediate point At the sending end At the receiving end Anywhere in the line ANSWER DOWNLOAD EXAMIANS APP
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