Electrical Machines Transformer cooling and insulating oil must be of low resistivity. high viscosity. low BDV. low viscosity. low resistivity. high viscosity. low BDV. low viscosity. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A shunt generator is running at 1000 rpm. If flux is reduced by half, then what is the new speed? 500. 0. 2000. 1000. 500. 0. 2000. 1000. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines To increase starting torque of a 3-phase slip ring induction motor, preferred method is to increase None of these rotor resistance supply voltage supply frequency None of these rotor resistance supply voltage supply frequency ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The shaft torque of a dc motor is less than the electromagnetic torque because of eddy current losses. mechanical losses. ohmic losses. hysteresis losses. eddy current losses. mechanical losses. ohmic losses. hysteresis losses. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In DC machines, the interpoles are provided to counteract demagnetizing effect of armature mmf in commutating zone. both (B) and (C). to make commutation spark less. to counteract the reactance voltage and the cross-magnetizi to counteract demagnetizing effect of armature mmf in commutating zone. both (B) and (C). to make commutation spark less. to counteract the reactance voltage and the cross-magnetizi ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The armature of DC machine is made of silicon steel lamination to reduce hysteresis loss only. reduce eddy current loss only. increase the permeability. reduce both eddy current and hysteresis loss. reduce hysteresis loss only. reduce eddy current loss only. increase the permeability. reduce both eddy current and hysteresis loss. ANSWER DOWNLOAD EXAMIANS APP
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