DC Motors Motor starter are essential for Accelerating the motor Starting the motor Preventing fuse blowing Avoiding excessive starting current Accelerating the motor Starting the motor Preventing fuse blowing Avoiding excessive starting current ANSWER DOWNLOAD EXAMIANS APP
DC Motors In a dc machines the residual magnetism is of the order of 20 to 25 percent 50 to 75 percent 10 to 15 percent 2 to 3 percent 20 to 25 percent 50 to 75 percent 10 to 15 percent 2 to 3 percent ANSWER DOWNLOAD EXAMIANS APP
DC Motors The power mentioned on the name plate of an electric motor indicates The power drawn in kW The gross power The output power available at the shaft The power drawn in kVA The power drawn in kW The gross power The output power available at the shaft The power drawn in kVA 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 2.22% 8.85% 6.77% 4.76% 2.22% 8.85% 6.77% 4.76% ANSWER DOWNLOAD EXAMIANS APP
DC Motors In variable speed motor A stronger commutating field is needed at low speed than at high speed Same commutating field is needed at low speed than at high speed None of these A weaker commutating field is needed at low speed than at high speed A stronger commutating field is needed at low speed than at high speed Same commutating field is needed at low speed than at high speed None of these A weaker commutating field is needed at low speed than at high speed ANSWER DOWNLOAD EXAMIANS APP
DC Motors Which of the following motor is preferred for operation in highly explosive atmosphere? Series motor Shunt motor Air motor Battery operated motor Series motor Shunt motor Air motor Battery operated motor ANSWER DOWNLOAD EXAMIANS APP
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