DC Motors In a dc compound machine, Series field winding plays dominant role Both play equally dominant role Either can play dominant role Shunt field winding plays dominant role Series field winding plays dominant role Both play equally dominant role Either can play dominant role Shunt field winding plays dominant role ANSWER DOWNLOAD EXAMIANS APP
DC Motors Excessive motor vibration is caused by Open armature coil Bent shaft Too much brush tension Worn bearings Open armature coil Bent shaft Too much brush tension Worn bearings ANSWER DOWNLOAD EXAMIANS APP
DC Motors A dc series motor is that which Has almost constant speed Has a poor torque Can be started easily without load Has its field winding consisting of thick wire and less turns Has almost constant speed Has a poor torque Can be started easily without load Has its field winding consisting of thick wire and less turns ANSWER DOWNLOAD EXAMIANS APP
DC Motors The back emf in a dc motor ______ Opposes the applied voltage Aids the armature current None of the listed here Aids the applied voltage Opposes the applied voltage Aids the armature current None of the listed here Aids the applied voltage ANSWER DOWNLOAD EXAMIANS APP
DC Motors For starting a dc motor a starter is required because It starts the motor It limits the starting current to a safe value It limits the speed of the motor None of the listed here It starts the motor It limits the starting current to a safe value It limits the speed of the motor None of the listed here ANSWER DOWNLOAD EXAMIANS APP
DC Motors In D.C. 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
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