Electrical Machines The principal of starting of 3 - Φ IM is similar to transformer with short-circuited secondary. synchronous motor. capacitor run IM. repulsion motor type starting. transformer with short-circuited secondary. synchronous motor. capacitor run IM. repulsion motor type starting. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Consider a separately excited DC motor. If the field current is increased while the armature terminal voltage is held constant, then speed of the motor Increase. Decrease. None of these. Remains same. Increase. Decrease. None of these. Remains same. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Slot wedges in a dc machine is made up of mild steel. fibre. cast iron. silicon steel. mild steel. fibre. cast iron. silicon steel. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In DC machine torque depends on which of the following? armature current (I) speed both A and B flux (φ) armature current (I) speed both A and B flux (φ) ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Armature reaction in dc motor results open circuit. short circuit. increase in speed. decrease in speed. open circuit. short circuit. increase in speed. decrease in speed. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Short circuiting is caused in the armature winding due to any of above. failure of insulation between two turns of coil. grounding of two or more turns of the same coil. failure of insulation between two commutator bars. any of above. failure of insulation between two turns of coil. grounding of two or more turns of the same coil. failure of insulation between two commutator bars. ANSWER DOWNLOAD EXAMIANS APP
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