DC Motors Which of the following motor has the poorest speed regulation? Series motor Shunt motor Cummulative compound motor Differentially compound motor Series motor Shunt motor Cummulative compound motor Differentially compound motor ANSWER DOWNLOAD EXAMIANS APP
DC Motors If conditions for maximum power for a dc motor are established, the efficiency of the motor will be 100 % 60 to 70 % Less than 50% 80 to 90 % 100 % 60 to 70 % Less than 50% 80 to 90 % ANSWER DOWNLOAD EXAMIANS APP
DC Motors The main disadvantage of the Ward-Leonard control method is All of these Low efficiency at high loads High maintenance cost High initial cost All of these Low efficiency at high loads High maintenance cost High initial cost ANSWER DOWNLOAD EXAMIANS APP
DC Motors In a dc 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 In D.C. motor which of the following can sustain the maximum temperature rise? Armature winding Slip rings Field winding Commutator Armature winding Slip rings Field winding Commutator ANSWER DOWNLOAD EXAMIANS APP
DC Motors In which of the following tests only one motor is required? Hopkinson's test Brake test Field's test Swinburne's test Hopkinson's test Brake test Field's test Swinburne's test ANSWER DOWNLOAD EXAMIANS APP
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