Electrical Machines If the field winding connection of DC shunt motor is changed It will run in opposite direction. It will run in same direction. motor will not run. motor will become slow. It will run in opposite direction. It will run in same direction. motor will not run. motor will become slow. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following motor is used in grinders? Capacitor start capacitor run IM. Split phase IM. Synchronous motor. Capacitor start IM. Capacitor start capacitor run IM. Split phase IM. Synchronous motor. Capacitor start IM. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the field connection of a DC Shunt Motor is changed then motor will not run. it will run in same direction. it will run in same direction by slowly. it will run in opposite direction. motor will not run. it will run in same direction. it will run in same direction by slowly. it will run in opposite direction. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In dc machines, 1. reactance voltage is proportional to armature current 2.reactance voltage is proportional to core length 3.reactance voltage is due to self-flux of the coil undergoing commutation 4. armature-cross flux is neutralized by interpolar flux 5. interpolarmmf is more than armature mmf in the interpolar zone From these, the correct answer is 1, 3, 5 2, 3, 4 1, 2, 5 1, 2, 3, 4 1, 3, 5 2, 3, 4 1, 2, 5 1, 2, 3, 4 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The full load copper loss and iron loss of transformer are 6400W and 5000W respectively. The copper loss and iron loss at half load will be respectively? 1600 W and 5000 W 3200 W and 2500 W 3200 W and 5200 W 1600 W and 1250 W 1600 W and 5000 W 3200 W and 2500 W 3200 W and 5200 W 1600 W and 1250 W ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a single phase induction motor driving a fan load, the reason for having a high resistance rotor is to achieve quick acceleration. high efficiency. reduced size. low starting torque. quick acceleration. high efficiency. reduced size. low starting torque. ANSWER DOWNLOAD EXAMIANS APP
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