DC Motors In a dc motor, the brushes are shifted from the mechanical neutral plane in a direction opposite to the rotation to _____ Decrease speed Reduce sparking Produce flat characteristics Increase speed Decrease speed Reduce sparking Produce flat characteristics Increase speed 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% 8.85% 2.22% 6.77% 4.76% 8.85% 2.22% 6.77% ANSWER DOWNLOAD EXAMIANS APP
DC Motors Dc series motors are used in those applications where _____ is required. Low no load speed High starting torque Constant speed None of the listed here Low no load speed High starting torque Constant speed None of the listed here ANSWER DOWNLOAD EXAMIANS APP
DC Motors The most suitable motor for elevators is the ____ motor. Cummulative compounded Shunt Differentially compuonded Series Cummulative compounded Shunt Differentially compuonded Series ANSWER DOWNLOAD EXAMIANS APP
DC Motors In variable speed motor Same commutating field is needed at low speed than at high speed A weaker commutating field is needed at low speed than at high speed A stronger commutating field is needed at low speed than at high speed None of these Same commutating field is needed at low speed than at high speed A weaker commutating field is needed at low speed than at high speed A stronger commutating field is needed at low speed than at high speed None of these ANSWER DOWNLOAD EXAMIANS APP
DC Motors In a dc motor if the back emf is absent Motor will not run at all Motor will burn Motor will run at very high speed Motor will run at very slow speed Motor will not run at all Motor will burn Motor will run at very high speed Motor will run at very slow speed ANSWER DOWNLOAD EXAMIANS APP
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