DC Motors In a dc motor, the brushes are shifted from the mechanical neutral plane in a direction opposite to the rotation to _____ Increase speed Produce flat characteristics Reduce sparking Decrease speed Increase speed Produce flat characteristics Reduce sparking Decrease speed ANSWER DOWNLOAD EXAMIANS APP
DC Motors Which of the following losses are significantly reduced by laminating the core of a D.C. generator? Eddy current losses Windage losses Hysteresis losses Copper losses Eddy current losses Windage losses Hysteresis losses Copper losses ANSWER DOWNLOAD EXAMIANS APP
DC Motors Excessive motor vibration is caused by Worn bearings Bent shaft Too much brush tension Open armature coil Worn bearings Bent shaft Too much brush tension Open armature coil ANSWER DOWNLOAD EXAMIANS APP
DC Motors The most suitable motor for elevators is the ____ motor. Differentially compuonded Series Cummulative compounded Shunt Differentially compuonded Series Cummulative compounded Shunt ANSWER DOWNLOAD EXAMIANS APP
DC Motors The running speed of a dc series motor is basically determined by Load None of the listed here Armature reaction Field excitation Load None of the listed here Armature reaction Field excitation ANSWER DOWNLOAD EXAMIANS APP
DC Motors The greatest percentage of power loss in a dc motor is due to Copper loss Friction loss Core loss Windage loss Copper loss Friction loss Core loss Windage loss ANSWER DOWNLOAD EXAMIANS APP
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