DC Motors Carbon brushes are preferable to copper brushes because _____ They reduce sparking They reduce armature reaction They have lower resistance They have longer life They reduce sparking They reduce armature reaction They have lower resistance They have longer life 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 2.22% 4.76% 6.77% 8.85% 2.22% 4.76% 6.77% 8.85% ANSWER DOWNLOAD EXAMIANS APP
DC Motors The compensating winding is connected in Series-parallel with armature None of the listed here Parallel with armature Series with armature Series-parallel with armature None of the listed here Parallel with armature Series with armature ANSWER DOWNLOAD EXAMIANS APP
DC Motors The direction of rotation of a D.C. series motor can be changed by Interchanging supply terminals Interchanging field terminals None of these Either of (A) and (B) above Interchanging supply terminals Interchanging field terminals None of these Either of (A) and (B) above ANSWER DOWNLOAD EXAMIANS APP
DC Motors If a dc motor is to be selected for conveyors, which motor would be preferred? Differentially compound motor Shunt motor Cummulative compound motor Series motor Differentially compound motor Shunt motor Cummulative compound motor Series motor ANSWER DOWNLOAD EXAMIANS APP
DC Motors Which motor should be used for centrifugal pumps? None of the listed here Shunt motor Series motor Either series or shunt None of the listed here Shunt motor Series motor Either series or shunt ANSWER DOWNLOAD EXAMIANS APP
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