DC Motors One D.C. motor drives another D.C. motor. The second D.C. motor when excited and driven Does not run as a generator Also runs as a motor comes to stop after sometime None of these Runs as a generator Does not run as a generator Also runs as a motor comes to stop after sometime None of these Runs as a generator ANSWER DOWNLOAD EXAMIANS APP
DC Motors Where D.C. motor of H.P. 12 or more requires frequent starting, stopping, reversing and speed control All above can be used Four point starter is used Drum type controller is used Three point starter is used All above can be used Four point starter is used Drum type controller is used Three point starter is used ANSWER DOWNLOAD EXAMIANS APP
DC Motors Which of the following motors is most suitable for signalling devices and many kinds of timers ? C. shunt motor Reluctance motor Induction motor C. series motor C. shunt motor Reluctance motor Induction motor C. series motor ANSWER DOWNLOAD EXAMIANS APP
DC Motors Which of the following losses are significantly reduced by laminating the core of a D.C. generator? Copper losses Windage losses Eddy current losses Hysteresis losses Copper losses Windage losses Eddy current losses Hysteresis losses ANSWER DOWNLOAD EXAMIANS APP
DC Motors In case the conditions for maximum power for a D.C. motor are established, the efficiency of the motor will be 1 Around 90% Anywhere between 75% and 90% Less than 50% 1 Around 90% Anywhere between 75% and 90% Less than 50% ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS