DC Motors A three point starter is considered suitable for Shunt as well as compound motors All D.C. motors Shunt, compound and series motors Shunt motors Shunt as well as compound motors All D.C. motors Shunt, compound and series motors Shunt motors ANSWER DOWNLOAD EXAMIANS APP
DC Motors The main disadvantage of the Ward-Leonard control method is 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 High initial cost ANSWER DOWNLOAD EXAMIANS APP
DC Motors The armature torque of the D.C. shunt motor is proportional to armature current only field flux only both (A) and (B) None of these armature current only field flux only both (A) and (B) None of these ANSWER DOWNLOAD EXAMIANS APP
DC Motors The most suitable motor for elevators is the ____ motor. Differentially compuonded Shunt Series Cummulative compounded Differentially compuonded Shunt Series Cummulative compounded ANSWER DOWNLOAD EXAMIANS APP
DC Motors Carbon brushes are preferable to copper brushes because _____ They reduce sparking They have longer life They reduce armature reaction They have lower resistance They reduce sparking They have longer life They reduce armature reaction They have lower resistance ANSWER DOWNLOAD EXAMIANS APP
DC Motors In case the conditions for maximum power for a D.C. motor are established, the efficiency of the motor will be 1 Around 90% Less than 50% Anywhere between 75% and 90% 1 Around 90% Less than 50% Anywhere between 75% and 90% ANSWER DOWNLOAD EXAMIANS APP