DC Motors Which of the following losses are significantly reduced by laminating the core of a D.C. generator? Copper losses Windage losses Eddy current losses Hysteresis losses Copper losses Windage losses Eddy current losses Hysteresis losses ANSWER DOWNLOAD EXAMIANS APP
DC Motors The speed of a motor falls from 1100 r.p.m. at no-load to 1050 r.p.m. at rated load. The speed regulation of the motor is 6.77% 8.85% 2.22% 4.76% 6.77% 8.85% 2.22% 4.76% ANSWER DOWNLOAD EXAMIANS APP
DC Motors If the speed of a dc shunt motor is increased the back emf of the motor will Decrease Remains same Become zero Increase Decrease Remains same Become zero Increase ANSWER DOWNLOAD EXAMIANS APP
DC Motors Which one of the following is not the function of pole shoes in a D.C. machine? To support the field coils To reduce the reluctance of the magnetic path To reduce eddy current loss To spread out flux for better uniformity To support the field coils To reduce the reluctance of the magnetic path To reduce eddy current loss To spread out flux for better uniformity ANSWER DOWNLOAD EXAMIANS APP
DC Motors Which of the following motors is most suitable for signalling devices and many kinds of timers ? Reluctance motor Induction motor C. series motor C. shunt motor Reluctance motor Induction motor C. series motor C. shunt motor ANSWER DOWNLOAD EXAMIANS APP
DC Motors ______ motor has the best speed regulation. Differentially compounded Shunt Cummulative compounded Series Differentially compounded Shunt Cummulative compounded Series ANSWER DOWNLOAD EXAMIANS APP
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