DC Motors In a dc motor, the brushes are shifted from the mechanical neutral plane in a direction opposite to the rotation to _____ Produce flat characteristics Reduce sparking Decrease speed Increase speed Produce flat characteristics Reduce sparking Decrease speed Increase speed ANSWER DOWNLOAD EXAMIANS APP
DC Motors By looking at which part of the motor, it can be easily confirmed that a particular motor is D.C. motor? Commutator Stator Shaft Frame Commutator Stator Shaft Frame ANSWER DOWNLOAD EXAMIANS APP
DC Motors In D.C. machines the residual magnetism is of the order of 10 to 15 percent 50 to 75 percent 20 to 25 percent 2 to 3 percent 10 to 15 percent 50 to 75 percent 20 to 25 percent 2 to 3 percent ANSWER DOWNLOAD EXAMIANS APP
DC Motors Excessive motor vibration is caused by Bent shaft Open armature coil Too much brush tension Worn bearings Bent shaft Open armature coil Too much brush tension Worn bearings ANSWER DOWNLOAD EXAMIANS APP
DC Motors In D.C. motor which of the following can sustain the maximum temperature rise? Armature winding Commutator Field winding Slip rings Armature winding Commutator Field winding Slip rings 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 Low cost Stability Wide speed range High starting torque Low cost Stability Wide speed range ANSWER DOWNLOAD EXAMIANS APP
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