DGVCL Exam Paper (11-12-2011) The main criterion for the design of a distributor is Voltage drop Corona loss Radio interference Temperature rise Voltage drop Corona loss Radio interference Temperature rise 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 Less than 90% 80 % 90 % More than 90% Less than 90% 80 % 90 % More 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 advantage of slipring induction motor over the squirrel cage induction motor is It can be started with the help of rotor resistances It is suitable for higher speeds It's power factor is higher It has a higher efficiency It can be started with the help of rotor resistances It is suitable for higher speeds It's power factor is higher It has a higher efficiency ANSWER EXPLANATION DOWNLOAD EXAMIANS APP slip ring motor have high starting torque compare to squirrel cage motor and have good speed controlalso have high over loading capacity, smooth acceleration under heavy loads.
DGVCL Exam Paper (11-12-2011) At time t= 0+ , with zero initial condition, which of the following acts as a short circuit? Resistor Voltage source Capacitor Conductor Resistor Voltage source Capacitor Conductor ANSWER DOWNLOAD EXAMIANS APP
DGVCL Exam Paper (11-12-2011) The form factor in AC means the ration of Peak value to r.m.s value R.M.S. value to average value Peak value to average value R.M.S. value to peak value Peak value to r.m.s value R.M.S. value to average value Peak value to average value R.M.S. value to peak value ANSWER DOWNLOAD EXAMIANS APP
DGVCL Exam Paper (11-12-2011) If the fault current is 2000 A, the relay plug setting is 50% and the CT ratio is 400/5, the plug setting multiple will be 15 50 10 25 15 50 10 25 ANSWER DOWNLOAD EXAMIANS APP
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