Electrical Machines The speed of a cumulatively compound DC motor can be controlled by varying Armature voltage control. Shunt field resistance control. Any of above. Armature resistance control. Armature voltage control. Shunt field resistance control. Any of above. Armature resistance control. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The teeth in the armature of a DC machines are sometimes skewed. This is done to reduce copper loss. vibrations. hysteresis loss. eddy electric current loss. copper loss. vibrations. hysteresis loss. eddy electric current loss. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 220 V dc machine has an armature resistance of 1Ω.If the full-load current is 20 A, the differenc in the induced voltages when the machine is running as a motor and as a generator is 50 V 40 V 20 V zero 50 V 40 V 20 V zero ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following is/are not a self starting motor? 1-phase induction motor both 1 and 2 None of these 3-phase induction motor 1-phase induction motor both 1 and 2 None of these 3-phase induction motor ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A short circuit test on a transformer gives copper loss at half load. copper loss at any load. copper loss at full load. copper loss at over load. copper loss at half load. copper loss at any load. copper loss at full load. copper loss at over load. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Quadrature axis synchronous reactance is the ratio of Vmin to Imax. Vmin to Imin. Vmax to Imax. Vmax to Imin. Vmin to Imax. Vmin to Imin. Vmax to Imax. Vmax to Imin. ANSWER DOWNLOAD EXAMIANS APP
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