DC Motors Small dc motors up to 5 HP usually have 4 poles 2 poles 8 poles 6 poles 4 poles 2 poles 8 poles 6 poles ANSWER DOWNLOAD EXAMIANS APP
DC Motors The value of back emf in dc motor is maximum at Half full load No load Full load None of the listed here Half full load No load Full load None of the listed here 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 Field losses Cu losses Iron and friction losses None of the listed here Field losses Cu losses ANSWER DOWNLOAD EXAMIANS APP
DC Motors For a D.C. shunt motor if the excitation is changed Torque and power both will change Torque, power and speed, all will change Torque will remain constant Torque will change but power will remain constant Torque and power both will change Torque, power and speed, all will change Torque will remain constant Torque will change but power will remain constant ANSWER DOWNLOAD EXAMIANS APP
DC Motors Carbon brushes are preferable to copper brushes because _____ They have longer life They have lower resistance They reduce sparking They reduce armature reaction They have longer life They have lower resistance They reduce sparking They reduce armature reaction ANSWER DOWNLOAD EXAMIANS APP
DC Motors Which motor has the poorest speed control? Differentially compounded motor Shunt motor Series motor Cummulative compounded motor Differentially compounded motor Shunt motor Series motor Cummulative compounded motor ANSWER DOWNLOAD EXAMIANS APP
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