DC Motors Compensating winding in a dc machine is placed On yoke in the pole faces None of the listed here On armature On yoke in the interpolar gap On yoke in the pole faces None of the listed here On armature On yoke in the interpolar gap ANSWER DOWNLOAD EXAMIANS APP
DC Motors Which one of the following is not the function of pole shoes in a D.C. machine? To spread out flux for better uniformity To reduce eddy current loss To reduce the reluctance of the magnetic path To support the field coils To spread out flux for better uniformity To reduce eddy current loss To reduce the reluctance of the magnetic path To support the field coils ANSWER DOWNLOAD EXAMIANS APP
DC Motors By flux control method of speed control of a dc shunt motor, we can obtain speeds. Above the normal speed only Above as well as below the normal speed None of the listed here Below the normal speed only Above the normal speed only Above as well as below the normal speed None of the listed here Below the normal speed only ANSWER DOWNLOAD EXAMIANS APP
DC Motors Which motor has the poorest speed control? Series motor Cummulative compounded motor Shunt motor Differentially compounded motor Series motor Cummulative compounded motor Shunt motor Differentially compounded motor ANSWER DOWNLOAD EXAMIANS APP
DC Motors In D.C. machines the residual magnetism is of the order of 50 to 75 percent 10 to 15 percent 20 to 25 percent 2 to 3 percent 50 to 75 percent 10 to 15 percent 20 to 25 percent 2 to 3 percent ANSWER DOWNLOAD EXAMIANS APP
DC Motors Carbon brushes are preferable to copper brushes because _____ They reduce armature reaction 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 ANSWER DOWNLOAD EXAMIANS APP
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