DC Motors The speed of a series motor at no load is 2000 rpm Infinity 1000 rpm 4000 rpm 2000 rpm Infinity 1000 rpm 4000 rpm ANSWER DOWNLOAD EXAMIANS APP
DC Motors A dc series motor is most suitable for Pump Cranes Lathes Punch presses Pump Cranes Lathes Punch presses ANSWER DOWNLOAD EXAMIANS APP
DC Motors In a dc motor if the back emf is absent Motor will not run at all Motor will run at very high speed Motor will burn Motor will run at very slow speed Motor will not run at all Motor will run at very high speed Motor will burn Motor will run at very slow speed ANSWER DOWNLOAD EXAMIANS APP
DC Motors Which one of the following is not necessarily the advantage of D.C. motors over A.C. motors? High starting torque Stability Wide speed range Low cost High starting torque Stability Wide speed range Low cost ANSWER DOWNLOAD EXAMIANS APP
DC Motors Which method of braking is generally used in elevators? Regenerative braking Rheostat braking Plugging None of these Regenerative braking Rheostat braking Plugging None of these ANSWER DOWNLOAD EXAMIANS APP
DC Motors The speed of a motor falls from 1100 r.p.m. at no-load to 1050 r.p.m. at rated load. The speed regulation of the motor is 8.85% 2.22% 6.77% 4.76% 8.85% 2.22% 6.77% 4.76% ANSWER DOWNLOAD EXAMIANS APP
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