Electrical Machines A dc shunt generator has full-load voltage regulation of 10% at rated speed of 1000 rpm. If it is now driven at 1250 rpm, then its voltage regulation at full load would be more than 10% remain unchanged be less than 10% be 12.5% be more than 10% remain unchanged be less than 10% be 12.5% ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Star - delta method of starting of motor is not possible in case of low horse power motor. high speed motor. high torque motor. single phase induction motor. low horse power motor. high speed motor. high torque motor. single phase induction motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In induction motor especially the cage rotors slots are nearly parallel to shaft axis. This is called slip. crawling. cogging. skewing. slip. crawling. cogging. skewing. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines To have sparkless commutation, the armature reaction effect in a DC machine is neutralized by fixing the brush axis inline with the pole axis. shifting the brush axis from GNA to MNA. increasing field excitation. compensating winding and commutating poles. fixing the brush axis inline with the pole axis. shifting the brush axis from GNA to MNA. increasing field excitation. compensating winding and commutating poles. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The stator core of a 3 - Φ induction motor is laminated in order to reduce the weight of the stator. both of the above. hysteresis loss. eddy current loss. weight of the stator. both of the above. hysteresis loss. eddy current loss. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The armature mmf in a dc machine is 1. stationary with respect to field poles 2. stationary with respect to armature 3. rotating with respect to field poles 4. rotating with respect to armature From these, the correct answer is 1, 4 2, 4 1, 3 2, 3 1, 4 2, 4 1, 3 2, 3 ANSWER DOWNLOAD EXAMIANS APP
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