DC Motors These days dc motors are widely used in Electric traction Air compressors Pumping sets Machine shops Electric traction Air compressors Pumping sets Machine shops ANSWER DOWNLOAD EXAMIANS APP
DC Motors In a dc motor, the brushes are shifted from the mechanical neutral plane in a direction opposite to the rotation to _____ Reduce sparking Increase speed Decrease speed Produce flat characteristics Reduce sparking Increase speed Decrease speed Produce flat characteristics ANSWER DOWNLOAD EXAMIANS APP
DC Motors The main disadvantage of the Ward-Leonard control method is High maintenance cost Low efficiency at high loads All of these High initial cost High maintenance cost Low efficiency at high loads All of these High initial cost ANSWER DOWNLOAD EXAMIANS APP
DC Motors Which motor should be used for centrifugal pumps? Either series or shunt Series motor None of the listed here Shunt motor Either series or shunt Series motor None of the listed here Shunt motor ANSWER DOWNLOAD EXAMIANS APP
DC Motors If a D.C. shunt motor is working at no load and if shunt field circuit suddenly opens Motor will run at very slow speed This will make armature to take heavy current, possibly burning it This will result in excessive speed, possibly destroying armature due to excessive centrifugal stresses Nothing will happen to the motor Motor will run at very slow speed This will make armature to take heavy current, possibly burning it This will result in excessive speed, possibly destroying armature due to excessive centrifugal stresses Nothing will happen to the motor ANSWER DOWNLOAD EXAMIANS APP
DC Motors The dirction of rotation of a dc series motor can be changed by Interchanging field terminals Interchanging supply terminals None of the listed here Either of Interchanging field or Interchanging supply Interchanging field terminals Interchanging supply terminals None of the listed here Either of Interchanging field or Interchanging supply ANSWER DOWNLOAD EXAMIANS APP
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