DC Motors In a dc machines the residual magnetism is of the order of 10 to 15 percent 50 to 75 percent 20 to 25 percent 2 to 3 percent 10 to 15 percent 50 to 75 percent 20 to 25 percent 2 to 3 percent ANSWER DOWNLOAD EXAMIANS APP
DC Motors During rheostat braking of dc series motor None of the listed here Motor is reversed in direction Motor is run as a generator Motor is run at reduced speed None of the listed here Motor is reversed in direction Motor is run as a generator Motor is run at reduced speed ANSWER DOWNLOAD EXAMIANS APP
DC Motors The shaft torque in a dc motor is less than total armature torque because of ______ in the motor. None of the listed here Field losses Cu losses Iron and friction losses None of the listed here Field losses Cu losses Iron and friction losses ANSWER DOWNLOAD EXAMIANS APP
DC Motors The speed of a series motor at no load is 2000 rpm Infinity 1000 rpm 4000 rpm 2000 rpm Infinity 1000 rpm 4000 rpm ANSWER DOWNLOAD EXAMIANS APP
DC Motors Which method of braking is generally used in elevators? Rheostat braking Plugging None of these Regenerative braking Rheostat braking Plugging None of these Regenerative braking ANSWER DOWNLOAD EXAMIANS APP
DC Motors For starting a dc motor a starter is required because None of the listed here It limits the speed of the motor It starts the motor It limits the starting current to a safe value None of the listed here It limits the speed of the motor It starts the motor It limits the starting current to a safe value ANSWER DOWNLOAD EXAMIANS APP
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