DC Motors What will happen if the back emf of a dc motor vanishes suddenly? The motor will run noisy The motor will continue to run The motor will stop The armature may burn The motor will run noisy The motor will continue to run The motor will stop The armature may burn ANSWER DOWNLOAD EXAMIANS APP
DC Motors In a dc compound machine, Series field winding plays dominant role Shunt field winding plays dominant role Either can play dominant role Both play equally dominant role Series field winding plays dominant role Shunt field winding plays dominant role Either can play dominant role Both play equally dominant role ANSWER DOWNLOAD EXAMIANS APP
DC Motors The shaft torque in a dc motor is less than total armature torque because of ______ in the motor. Iron and friction losses None of the listed here Cu losses Field losses Iron and friction losses None of the listed here Cu losses Field losses ANSWER DOWNLOAD EXAMIANS APP
DC Motors Excessive motor vibration is caused by Too much brush tension Worn bearings Bent shaft Open armature coil Too much brush tension Worn bearings Bent shaft Open armature coil ANSWER DOWNLOAD EXAMIANS APP
DC Motors The mechanical power developed by a shunt motor will be maximum when the ratio of back emf to applied voltage is 4.0 0.5 2.0 1.0 4.0 0.5 2.0 1.0 ANSWER DOWNLOAD EXAMIANS APP
DC Motors Which of the following motor has the poorest speed regulation? Series motor Shunt motor Cummulative compound motor Differentially compound motor Series motor Shunt motor Cummulative compound motor Differentially compound motor ANSWER DOWNLOAD EXAMIANS APP
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