DC Motors Excessive sparking at brushes may be caused due to Misaligment of machine Loose coupling Dirt on the commutator Worn bearings Misaligment of machine Loose coupling Dirt on the commutator Worn bearings ANSWER DOWNLOAD EXAMIANS APP
DC Motors In a D.C. shunt motor, under the conditions of maximum power, the current in the armature will be Rated full-load current More than full-load current Almost negligible Less than full-load current Rated full-load current More than full-load current Almost negligible Less than full-load current ANSWER DOWNLOAD EXAMIANS APP
DC Motors The speed of a dc motor can be controlled by changing Aplied voltage Armature circuit resistance Is flux All of the listed here Aplied voltage Armature circuit resistance Is flux All of the listed here ANSWER DOWNLOAD EXAMIANS APP
DC Motors Which one of the following is not the function of pole shoes in a D.C. machine? To reduce eddy current loss To reduce the reluctance of the magnetic path To spread out flux for better uniformity To support the field coils To reduce eddy current loss To reduce the reluctance of the magnetic path To spread out flux for better uniformity To support the field coils 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 Shaft Frame Stator Commutator Shaft Frame Stator ANSWER DOWNLOAD EXAMIANS APP
DC Motors If a D.C. shunt motor is working at full load and if shunt field circuit suddenly opens This will result in excessive speed, possibly destroying armature due to excessive centrifugal stresses This will make armature to take heavy current, possibly burning it Nothing will happen to motor Motor will come to stop This will result in excessive speed, possibly destroying armature due to excessive centrifugal stresses This will make armature to take heavy current, possibly burning it Nothing will happen to motor Motor will come to stop ANSWER DOWNLOAD EXAMIANS APP
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