Electrical Machines The slot edges in a DC machine are made of Fibre. Mild steel. Cast iron. Silicon steel. Fibre. Mild steel. Cast iron. Silicon steel. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A self-excited shunt generator fails to build up, because 1. the field circuit is open 2. The armature circuit is open 3. the residual magnetism is absent 4. The direction of rotation is wrong From these, the correct answer is 1, 3 3 only 1, 2 and 3 1, 2, 3 and 4 1, 3 3 only 1, 2 and 3 1, 2, 3 and 4 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In Ward-Leonard method of speed control, the direction of rotation of motor is reversed usually reversing the connection of the motor armature terminal. generator armature terminal. generator field terminal. motor field terminal. motor armature terminal. generator armature terminal. generator field terminal. motor field terminal. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Slip rings of an induction motors are made of aluminium. stainless steel. phosphor bronze. carbon. aluminium. stainless steel. phosphor bronze. carbon. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the number of rotor slots is equal to number of stator slots, then motor refuses to start. Hence it is known as crawling. cogging. air gap. relative speed. crawling. cogging. air gap. relative speed. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The output power of a dc motor is given by EIa. none of these. EbIa. EbIa2. EIa. none of these. EbIa. EbIa2. ANSWER DOWNLOAD EXAMIANS APP
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