Electrical Machines A single phase, 2 KV alternator has an armature resistance of 0.8 ohms and 4.94 ohms respectively. The voltage regulation of the alternator at 100 a load 0.8 loading power factor is 0%. 14%. 7%. 8.9%. 0%. 14%. 7%. 8.9%. ANSWER DOWNLOAD EXAMIANS APP
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 127 A. 173 A. 240 A. 190 A. 127 A. 173 A. 240 A. 190 A. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A three phase induction motor has a synchronous speed of 1500 rpm the machine runs at 1460 rpm at a particular load. The slip at this load is ___________. 1.5 %. 2.67 %. 30 %. 5 %. 1.5 %. 2.67 %. 30 %. 5 %. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines As compared to DOL starting, a cage induction motor with star-delta starting shall have smoother acceleration. more starting time. reduced starting current. more starting torque. smoother acceleration. more starting time. reduced starting current. more starting torque. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If field current is decreased in shunt dc motor, the speed of the motor increases. remains same. decreases. None of these increases. remains same. decreases. None of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In travelling cranes for crane travel, trolley and boom hoist which motor is preferred? Synchronous motor. Slip ring induction motor. Stepper motor. DC differential compound motor. Synchronous motor. Slip ring induction motor. Stepper motor. DC differential compound motor. ANSWER DOWNLOAD EXAMIANS APP
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