DC Motors If the speed of a dc shunt motor is increased the back emf of the motor will Decrease Increase Become zero Remains same Decrease Increase Become zero Remains same ANSWER DOWNLOAD EXAMIANS APP
DC Motors In D.C. machines the residual magnetism is of the order of 50 to 75 percent 2 to 3 percent 10 to 15 percent 20 to 25 percent 50 to 75 percent 2 to 3 percent 10 to 15 percent 20 to 25 percent ANSWER DOWNLOAD EXAMIANS APP
DC Motors The armature voltage control of dc motor provides None of the listed here Constant voltage drive Constant torque drive Constant current drive None of the listed here Constant voltage drive Constant torque drive Constant current drive ANSWER DOWNLOAD EXAMIANS APP
DC Motors A direct on line starter is used for starting motors Upto 5 HP Upto 15 HP Upto 20 HP Upto 10 HP Upto 5 HP Upto 15 HP Upto 20 HP Upto 10 HP ANSWER DOWNLOAD EXAMIANS APP
DC Motors The main disadvantage of the Ward-Leonard control method is High initial cost Low efficiency at high loads High maintenance cost All of these High initial cost Low efficiency at high loads High maintenance cost All of these ANSWER DOWNLOAD EXAMIANS APP
DC Motors In which of the following tests only one motor is required? Hopkinson's test Brake test Swinburne's test Field's test Hopkinson's test Brake test Swinburne's test Field's test ANSWER DOWNLOAD EXAMIANS APP
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