Electrical Machines A generator may loose residual magnetism due to over excitation. heating. vibrations. any of these. over excitation. heating. vibrations. any of these. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of following motor is preferred for belt conveyor? Universal motor. Slip ring induction motor. Synchronous motors. Reluctance motor. Universal motor. Slip ring induction motor. Synchronous motors. Reluctance motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In DC machine shape of armature MMF wave is? Saddle shape. Peaky in nature. Triangular and directed towards main pole. Triangular and directed towards brush axis. Saddle shape. Peaky in nature. Triangular and directed towards main pole. Triangular and directed towards brush axis. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The shaft torque of a dc motor is less than the electromagnetic torque because of hysteresis losses. ohmic losses. mechanical losses. eddy current losses. hysteresis losses. ohmic losses. mechanical losses. eddy current losses. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Slot wedges in a dc machine is made up of fibre. silicon steel. mild steel. cast iron. fibre. silicon steel. mild steel. cast iron. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A dc shunt generator, when commissioned after a major repair of the field system, failed to build Up voltage. It was because field winding was wrongly connected field resistance was higher than critical resistance field system lost residual magnetism there was a break in the armature circuit field winding was wrongly connected field resistance was higher than critical resistance field system lost residual magnetism there was a break in the armature circuit ANSWER DOWNLOAD EXAMIANS APP
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