DC Motors ______ motor has the best speed regulation. Cummulative compounded Differentially compounded Series Shunt Cummulative compounded Differentially compounded Series Shunt ANSWER DOWNLOAD EXAMIANS APP
DC Motors In a dc motor if the back emf is absent Motor will run at very high speed Motor will not run at all Motor will burn Motor will run at very slow speed Motor will run at very high speed Motor will not run at all Motor will burn Motor will run at very slow speed ANSWER DOWNLOAD EXAMIANS APP
DC Motors Ward-Leonard control is basically a Armature resistance control method Voltage control method Field control method Field divertor method Armature resistance control method Voltage control method Field control method Field divertor method ANSWER DOWNLOAD EXAMIANS APP
DC Motors Where D.C. motor of H.P. 12 or more requires frequent starting, stopping, reversing and speed control 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 All above can be used ANSWER DOWNLOAD EXAMIANS APP
DC Motors Which method of braking is generally used in elevators? Regenerative braking Plugging None of these Rheostat braking Regenerative braking Plugging None of these Rheostat braking ANSWER DOWNLOAD EXAMIANS APP
DC Motors Which one of the following is not the function of pole shoes in a D.C. machine? To reduce eddy current loss To spread out flux for better uniformity To reduce the reluctance of the magnetic path To support the field coils To reduce eddy current loss To spread out flux for better uniformity To reduce the reluctance of the magnetic path To support the field coils ANSWER DOWNLOAD EXAMIANS APP
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