Electrical Machines In DC generators, the brushes remain in contact with conductors which there is no hard and fast rule for this. lie in the inter polar gaps. lie under north pole. lie under south pole. there is no hard and fast rule for this. lie in the inter polar gaps. lie under north pole. lie under south pole. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Ward Leonard control is provides speed control In one direction only. Above rated speed. Below rated speed. In both direction. In one direction only. Above rated speed. Below rated speed. In both direction. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 3-φ alternator has negligible stator resistance. A short circuit test is conducted on this alternator. At a particular speed, a field current of If1 is required to drive the rated armature current. If the speed of the alternator is reduced to half, the field current required to maintain rated armature current Would be equal to If1. Cannot be predicted due to insufficient data. Would be equal to If1/2. Woud be equal to 2If1. Would be equal to If1. Cannot be predicted due to insufficient data. Would be equal to If1/2. Woud be equal to 2If1. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines High inrush of current during a starting of DC motor can efficiently be restricted to a safer value by increasing the _________________ resistance. armature circuit both A and B shunt field none of above armature circuit both A and B shunt field none of above ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The current drawn by a 220 V DC series motor of armature resistance 0.5Ω and back back emf 200 V is 400 A. 40 A. 44 A. 440 A. 400 A. 40 A. 44 A. 440 A. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In travelling cranes for swing action which motor is preferred? Capacitor type induction motors. AC slip ring IM. DC series motor. Reluctance motor. Capacitor type induction motors. AC slip ring IM. DC series motor. Reluctance motor. ANSWER DOWNLOAD EXAMIANS APP
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