Electrical Machines Maximum allowable acidity level of power transformer insulating oil is generally taken as 1 mg of KOH / gm. 0.3 mg of KOH / gm. 0.5 mg of KOH / gm. 2 mg of KOH / gm. 1 mg of KOH / gm. 0.3 mg of KOH / gm. 0.5 mg of KOH / gm. 2 mg of KOH / gm. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Armature resistance control method is also called as-----------? constant current control constant power control constant voltage control constant torque control constant current control constant power control constant voltage control constant torque control ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines To control the speed of an induction motor, the supply frequency is reduced by 10%. For the same magnetizing current to remain constant, the supply voltage must be reduced by 20% increased by 10% reduced by 10% increased by 20% reduced by 20% increased by 10% reduced by 10% increased by 20% ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Slip test is performed to determine slip positive sequence reactance and negative sequence reactance All of these direct axis reactance and quadrature axis reactance slip positive sequence reactance and negative sequence reactance All of these direct axis reactance and quadrature axis reactance ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The shaft torque of a dc motor is less than the electromagnetic torque because of mechanical losses. ohmic losses. hysteresis losses. eddy current losses. mechanical losses. ohmic losses. hysteresis losses. eddy current losses. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the applied voltage to a dc machine is 230 V, then the back emf, for maximum power developed, is 200 V 230 V 460 V 115 V 200 V 230 V 460 V 115 V ANSWER DOWNLOAD EXAMIANS APP
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