DC Motors Which of the following in a dc motor, can sustain the maximum temperature rise? Commutator Slip rings Armature winding Field winding Commutator Slip rings Armature winding Field winding ANSWER DOWNLOAD EXAMIANS APP
DC Motors The dirction of rotation of a dc series motor can be changed by None of the listed here Either of Interchanging field or Interchanging supply Interchanging field terminals Interchanging supply terminals None of the listed here Either of Interchanging field or Interchanging supply Interchanging field terminals Interchanging supply terminals 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 run at very slow speed Motor will burn Motor will run at very high speed Motor will not run at all Motor will run at very slow speed Motor will burn ANSWER DOWNLOAD EXAMIANS APP
DC Motors Which method of braking is generally used in elevators? None of these Rheostat braking Plugging Regenerative braking None of these Rheostat braking Plugging Regenerative braking 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 4.76% 2.22% 6.77% 8.85% 4.76% 2.22% 6.77% 8.85% ANSWER DOWNLOAD EXAMIANS APP
DC Motors Which of the following tests will be suitable for testing two similar D.C. series motors of large capacity? Field test Brake test Hopkinson's test Swinburne's test Field test Brake test Hopkinson's test Swinburne's test ANSWER DOWNLOAD EXAMIANS APP
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