DC Motors If a dc motor is to be selected for conveyors, which motor would be preferred? Cummulative compound motor Shunt motor Series motor Differentially compound motor Cummulative compound motor Shunt motor Series motor Differentially compound motor 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 Around 90% 1 Less than 50% Anywhere between 75% and 90% Around 90% 1 Less than 50% Anywhere between 75% and 90% ANSWER DOWNLOAD EXAMIANS APP
DC Motors The main disadvantage of the Ward-Leonard control method is 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 All of these ANSWER DOWNLOAD EXAMIANS APP
DC Motors A dc series motor is best suited for driving Cranes and hoists None of the listed here Shear and punches Machine tools Cranes and hoists None of the listed here Shear and punches Machine tools 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 _____ Decrease speed Produce flat characteristics Reduce sparking Increase speed Decrease speed Produce flat characteristics Reduce sparking Increase speed ANSWER DOWNLOAD EXAMIANS APP
DC Motors Excessive motor vibration is caused by Open armature coil Worn bearings Bent shaft Too much brush tension Open armature coil Worn bearings Bent shaft Too much brush tension ANSWER DOWNLOAD EXAMIANS APP
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