Electrical Machines A 500 V, 120 KW, 50 Hz, star connected synchronous motor operating at 0.8 power factor leading has full load efficiency of 91%. The armature resistance is equal to 0.08Ω. The magnitude of armature current is nearly equal to 190 A. 240 A. 173 A. 127 A. 190 A. 240 A. 173 A. 127 A. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A load of 900 lbs is to be raised with a lift car weighting 855 lbs at a speed of 110 feet per minute, the over balance being 40 % and percentage efficiency 45 %. Find the horse power of the motor without counterweight 150. 160. 170. 180. 150. 160. 170. 180. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Voltage regulation can be determined by which of the following? ZPF method. MMf method. All of these Synchronous impedance method. ZPF method. MMf method. All of these Synchronous impedance method. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In DC machine shape of armature MMF wave is? Triangular and directed towards brush axis. Triangular and directed towards main pole. Peaky in nature. Saddle shape. Triangular and directed towards brush axis. Triangular and directed towards main pole. Peaky in nature. Saddle shape. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If any two leads from slip rings are interchanged in a 3 - Φ induction motor, the motor will get damaged. run in a direction opposite to previous one. not run. continue running in the same direction as before. get damaged. run in a direction opposite to previous one. not run. continue running in the same direction as before. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following induction motor has the highest starting torque? Same in both induction motors. Squirrel cage induction motor. None of these Slip ring induction motor. Same in both induction motors. Squirrel cage induction motor. None of these Slip ring induction motor. ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS