Electrical Machines If the excitation is reduced, the power factor is lagging power factor leading power factor unity power factor None of these lagging power factor leading power factor unity power factor None of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a 1-phase induction motor, if the forward torque slip is S, what is the backward torque slip? S 1-S 1/S 2-S S 1-S 1/S 2-S ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In an induction motor, the no-load slip is generally equal to 1.5 %. zero. 4 %. less than 1 %. 1.5 %. zero. 4 %. less than 1 %. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Armature reaction of an unsaturated DC machine is crossmagnetising. magnetising. demagnetising. none of above. crossmagnetising. magnetising. demagnetising. none of above. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A transformer core is made up of a silicon steel laminations which has maximum flux density 1 Tesla. If it was cold rolled grain oriented its flux density increases to 1.6 Tesla. What is the saving in core size or area due to cold rolled grain oriented process? 38% 40% 60% 68% 38% 40% 60% 68% ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For the same power output rating and full load speed, the motor will have poorest starting torque, is Series. Differential compound. Cummulative compound. Shunt. Series. Differential compound. Cummulative compound. Shunt. ANSWER DOWNLOAD EXAMIANS APP
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