DGVCL Exam Paper (11-12-2011) The positive and negative sequence impedance of a transmission line are Infinite Equal Different Zero Infinite Equal Different Zero ANSWER DOWNLOAD EXAMIANS APP
DGVCL Exam Paper (11-12-2011) Permittivity is expressed in terms of Weber /m farad/sq. m. Farad/m N/m Weber /m farad/sq. m. Farad/m N/m ANSWER DOWNLOAD EXAMIANS APP
DGVCL Exam Paper (11-12-2011) The mutual inductance between two unity coupled coils of 9 H and 4 H is 36 H 2.2 H 6 H 13 H 36 H 2.2 H 6 H 13 H ANSWER DOWNLOAD EXAMIANS APP
DGVCL Exam Paper (11-12-2011) Which type of back up protection is widely used for the protection of transmission lines? Control backup Breaker backup Remote backup Relay backup Control backup Breaker backup Remote backup Relay backup ANSWER DOWNLOAD EXAMIANS APP
DGVCL Exam Paper (11-12-2011) The efficiency of a transformer at full load, 0.8 p.f. lag is 90%. Its efficiency at full load, 0.8 p.f. lead will be 90 % More than 90% 80 % Less than 90% 90 % More than 90% 80 % Less than 90% ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Efficiency= output power/input powerefficiency = (v*i*cosφ)/((v*i*cosφ)+(x² Pc)+(Pi)) x=fractional part of full load
DGVCL Exam Paper (11-12-2011) The insulation coordination for UHV lines (above 500 kV) is done based on Lightning and switching surges Lightning surges Voltage level of the line Switching surges Lightning and switching surges Lightning surges Voltage level of the line Switching surges ANSWER DOWNLOAD EXAMIANS APP
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