DC Motors If conditions for maximum power for a dc motor are established, the efficiency of the motor will be 80 to 90 % 60 to 70 % Less than 50% 100 % 80 to 90 % 60 to 70 % Less than 50% 100 % ANSWER DOWNLOAD EXAMIANS APP
DC Motors If a D.C. shunt motor is working at no load and if shunt field circuit suddenly opens Motor will run at very slow speed Nothing will happen to the motor This will make armature to take heavy current, possibly burning it This will result in excessive speed, possibly destroying armature due to excessive centrifugal stresses Motor will run at very slow speed Nothing will happen to the motor This will make armature to take heavy current, possibly burning it This will result in excessive speed, possibly destroying armature due to excessive centrifugal stresses ANSWER DOWNLOAD EXAMIANS APP
DC Motors ______ motor has the best speed regulation. Cummulative compounded Shunt Differentially compounded Series Cummulative compounded Shunt Differentially compounded Series ANSWER DOWNLOAD EXAMIANS APP
DC Motors In D.C. motor which of the following can sustain the maximum temperature rise? Slip rings Field winding Armature winding Commutator Slip rings Field winding Armature winding Commutator ANSWER DOWNLOAD EXAMIANS APP
DC Motors The back emf in a dc motor ______ Opposes the applied voltage Aids the applied voltage Aids the armature current None of the listed here Opposes the applied voltage Aids the applied voltage Aids the armature current None of the listed here ANSWER DOWNLOAD EXAMIANS APP
DC Motors The most suitable motor for elevators is the ____ motor. Differentially compuonded Series Cummulative compounded Shunt Differentially compuonded Series Cummulative compounded Shunt ANSWER DOWNLOAD EXAMIANS APP
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