Electrical Machines The speed of a 50 Hz three phase induction motor under full load condition is 725 rpm the number of poles of the motor are ______________. 4. 2. 8. 6. 4. 2. 8. 6. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines To achieve spark less commutation brushes of DC generator are rocked ahead so as to bring them just ahead of magnetic neutral axis. just behind the magnetic neutral axis. None of these in magnetic neutral axis. just ahead of magnetic neutral axis. just behind the magnetic neutral axis. None of these in magnetic neutral axis. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In star-delta starting of squirrel cage induction motor compared to DOL starting the starting current and torque are 1/3, 1/3 1/√3, 1/3 1/3, 1/√3 1/√3, 1/√3 1/3, 1/3 1/√3, 1/3 1/3, 1/√3 1/√3, 1/√3 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If residual magnetism of a shunt generator is destroyed accidentally it may be restored by connecting its shunt field to a DC source. in reverse. to earth. to an AC source. to a DC source. in reverse. to earth. to an AC source. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A shunt generator is running at 1000 rpm. If flux is reduced by half, then what is the new speed? 0. 2000. 1000. 500. 0. 2000. 1000. 500. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What is the function of inter pole in DC generator? Both option B and C. To get a superior commutation. To serve the economical aspects. To neutralize the distortion of main field flux due to armature reaction. Both option B and C. To get a superior commutation. To serve the economical aspects. To neutralize the distortion of main field flux due to armature reaction. ANSWER DOWNLOAD EXAMIANS APP
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