Electrical Machines Find the number of poles required, when the frequency is 50Hz and speed of the motor is 500 rpm? 12 10 5 24 12 10 5 24 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The short circuit test on a transformer is conducted to obtain eddy current loss. copper losses. core loses only. hysteresis loss. eddy current loss. copper losses. core loses only. hysteresis loss. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Maximum allowable moisture content of power transformer insulating oil is generally taken as 20 ppm. 25 ppm. 35 ppm. 45 ppm. 20 ppm. 25 ppm. 35 ppm. 45 ppm. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Armature reaction of an unsaturated DC machine is none of above. magnetising. demagnetising. crossmagnetising. none of above. magnetising. demagnetising. crossmagnetising. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What is power factor of a 3 - φ induction motor at no load? Low. Same as full load. High. Equal to 1. Low. Same as full load. High. Equal to 1. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A DC generator beyond critical resistance will generate maximum voltage. no voltage. maximum current. maximum power. maximum voltage. no voltage. maximum current. maximum power. ANSWER DOWNLOAD EXAMIANS APP
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