DC Motors The main disadvantage of the Ward-Leonard control method is All of these Low efficiency at high loads High maintenance cost High initial cost All of these Low efficiency at high loads High maintenance cost High initial cost ANSWER DOWNLOAD EXAMIANS APP
DC Motors In case the conditions for maximum power for a D.C. motor are established, the efficiency of the motor will be Anywhere between 75% and 90% 1 Around 90% Less than 50% Anywhere between 75% and 90% 1 Around 90% Less than 50% ANSWER DOWNLOAD EXAMIANS APP
DC Motors A series motor will over speed when The field is opened Load is removed The load is increase The armature circuit is opened. The field is opened Load is removed The load is increase The armature circuit is opened. 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 At the instant of starting when a D.C. motor is put on supply, it behaves like A capacitive circuit A highly resistive circuit None of these A low resistance circuit A capacitive circuit A highly resistive circuit None of these A low resistance circuit ANSWER DOWNLOAD EXAMIANS APP
DC Motors Which of the following motor is preferred for operation in highly explosive atmosphere? Battery operated motor Shunt motor Series motor Air motor Battery operated motor Shunt motor Series motor Air motor ANSWER DOWNLOAD EXAMIANS APP
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