Electrical Machines If the full load speed of 3-phase, 50Hz induction motor is 950 rpm, what is its half load speed nearly equals to? 950 rpm 975 rpm 940 rpm 1000 rpm 950 rpm 975 rpm 940 rpm 1000 rpm ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In case the conditions for maximum power for DC motor are established, the efficiency of the motor will be Any where between 75 % and 90 %. Less than 50 % Around 90 % Around 100 %. Any where between 75 % and 90 %. Less than 50 % Around 90 % Around 100 %. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Dissolve gas analysis of transformer oil is carried out to determine condition of transformer. condition of bushing stud. condition of bushings. condition of transformer oil. condition of transformer. condition of bushing stud. condition of bushings. condition of transformer oil. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The DC compound motors are generally Level Compound. Differentical compound. Cummulative compound. None of these. Level Compound. Differentical compound. Cummulative compound. None of these. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Under operating conditions the rotor conductor should be _________________ in induction motor. always opened. always closed. semi closed or semi opened. none. always opened. always closed. semi closed or semi opened. none. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In induction motor when the length of the air gap is increased, the magnetizing current of the motor increases while the short circuit current __________________. decreased. kept constant to certain value. remains unchanged. increased. decreased. kept constant to certain value. remains unchanged. increased. ANSWER DOWNLOAD EXAMIANS APP
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