DC Motors Small dc motors up to 5 HP usually have 2 poles 8 poles 4 poles 6 poles 2 poles 8 poles 4 poles 6 poles ANSWER DOWNLOAD EXAMIANS APP
DC Motors The resistance of shunt field winding as compared to series field winding is Less The same More None of the listed here Less The same More None of the listed here ANSWER DOWNLOAD EXAMIANS APP
DC Motors For constant torque drive which speed control method is preferred? Field control Mechanical loading system Shunt armature control Armature voltage control Field control Mechanical loading system Shunt armature control Armature voltage control ANSWER DOWNLOAD EXAMIANS APP
DC Motors The mechanical power developed by a shunt motor will be maximum when the ratio of back emf to applied voltage is 1.0 0.5 4.0 2.0 1.0 0.5 4.0 2.0 ANSWER DOWNLOAD EXAMIANS APP
DC Motors The main disadvantage of the Ward-Leonard control method is High initial cost High maintenance cost All of these Low efficiency at high loads High initial cost High maintenance cost All of these Low efficiency at high loads ANSWER DOWNLOAD EXAMIANS APP
DC Motors Which of the following methods gives the greatest braking torque? Plugging Rheostatic braking Regenerative braking None of the listed here Plugging Rheostatic braking Regenerative braking None of the listed here ANSWER DOWNLOAD EXAMIANS APP
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