DC Motors In a dc motor, the brushes are shifted from the mechanical neutral plane in a direction opposite to the rotation to _____ Decrease speed Reduce sparking Increase speed Produce flat characteristics Decrease speed Reduce sparking Increase speed Produce flat characteristics ANSWER DOWNLOAD EXAMIANS APP
DC Motors If conditions for maximum power for a dc motor are established, the efficiency of the motor will be 60 to 70 % Less than 50% 80 to 90 % 100 % 60 to 70 % Less than 50% 80 to 90 % 100 % ANSWER DOWNLOAD EXAMIANS APP
DC Motors Motor starter are essential for Avoiding excessive starting current Accelerating the motor Preventing fuse blowing Starting the motor Avoiding excessive starting current Accelerating the motor Preventing fuse blowing Starting the motor ANSWER DOWNLOAD EXAMIANS APP
DC Motors Differentially compound D.C. motors can find applications requiring Variable speed High starting torque Low starting torque Frequent on-off cycles Variable speed High starting torque Low starting torque Frequent on-off cycles ANSWER DOWNLOAD EXAMIANS APP
DC Motors Where D.C. motor of H.P. 12 or more requires frequent starting, stopping, reversing and speed control Drum type controller is used All above can be used Three point starter is used Four point starter is used Drum type controller is used All above can be used Three point starter is used Four point starter is used ANSWER DOWNLOAD EXAMIANS APP
DC Motors The armature voltage control of dc motor provides Constant voltage drive Constant torque drive Constant current drive None of the listed here Constant voltage drive Constant torque drive Constant current drive None of the listed here ANSWER DOWNLOAD EXAMIANS APP
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