Electrical Machines For high current and low current rating which winding is employed to DC machine? Wave winding Lap winding None of above Both lap and wave winding Wave winding Lap winding None of above Both lap and wave winding ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Unbalance 3 - Φ stator currents cause double frequency currents in the rotor. vibrations. heating of rotor. All of these double frequency currents in the rotor. vibrations. heating of rotor. All of these 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 180. 160. 170. 150. 180. 160. 170. 150. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a three phase star - delta transformer, what is the angle difference between primary and secondary phase voltages? Delta side lags by -30°. Star side lags by -30°. Star side leads by 30°. Delta side leads by 30°. Delta side lags by -30°. Star side lags by -30°. Star side leads by 30°. Delta side leads by 30°. 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 ___________. 2.67 %. 5 %. 1.5 %. 30 %. 2.67 %. 5 %. 1.5 %. 30 %. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The slight curvature at the lower end of the OCC of a self excited DC generator is due to high field resistance. magnetic inertia. residual flux. high speed. high field resistance. magnetic inertia. residual flux. high speed. ANSWER DOWNLOAD EXAMIANS APP
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