Electrical Machines What is power factor of a 3 - φ induction motor at no load? Equal to 1. Low. Same as full load. High. Equal to 1. Low. Same as full load. High. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A dc series motor driving and electric train faces a constant power load. It is running at rated speed and rated voltage. If the speed has to be brought down to 0.25 p.u. the supply voltage has to be approximately brought down to 0.25 p.u 0.5 p.u 0.125 p.u 0.75 p.u 0.25 p.u 0.5 p.u 0.125 p.u 0.75 p.u ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A short circuit test on a transformer gives copper loss at full load. copper loss at over load. copper loss at any load. copper loss at half load. copper loss at full load. copper loss at over load. copper loss at any load. copper loss at half load. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In applied voltage is reduced in a dc shunt motor Full load current. Full load speed. None of these. Full load torque. Full load current. Full load speed. None of these. Full load torque. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 3 - Φ induction motor draws an current of 50 A from mains when starts by direct switching. If an auto transformer with 60 % tapping is used for starting the current drawn from the mains will be 80. 18. 50. 36. 80. 18. 50. 36. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 3 - Φ, 4 pole IM is supplied from a 50 Hz source. Calculate rotor frequency when rotor runs 600 rpm? 30 Hz. Can be determined. 20 Hz. 35 Hz. 30 Hz. Can be determined. 20 Hz. 35 Hz. ANSWER DOWNLOAD EXAMIANS APP
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