DC Motors Dc series motors are used in those applications where _____ is required. Constant speed High starting torque Low no load speed None of the listed here Constant speed High starting torque Low no load speed None of the listed here ANSWER DOWNLOAD EXAMIANS APP
DC Motors In D.C. machines the residual magnetism is of the order of 10 to 15 percent 50 to 75 percent 20 to 25 percent 2 to 3 percent 10 to 15 percent 50 to 75 percent 20 to 25 percent 2 to 3 percent ANSWER DOWNLOAD EXAMIANS APP
DC Motors What will happen if the back emf of a dc motor vanishes suddenly? The armature may burn The motor will stop The motor will run noisy The motor will continue to run The armature may burn The motor will stop The motor will run noisy The motor will continue to run ANSWER DOWNLOAD EXAMIANS APP
DC Motors Which of the following motor is preferred for operation in highly explosive atmosphere? Series motor Battery operated motor Shunt motor Air motor Series motor Battery operated motor Shunt motor Air motor ANSWER DOWNLOAD EXAMIANS APP
DC Motors The most suitable motor for elevators is the ____ motor. Differentially compuonded Shunt Cummulative compounded Series Differentially compuonded Shunt Cummulative compounded Series ANSWER DOWNLOAD EXAMIANS APP
DC Motors If a D.C. shunt motor is working at no load and if shunt field circuit suddenly opens This will result in excessive speed, possibly destroying armature due to excessive centrifugal stresses Nothing will happen to the motor Motor will run at very slow speed 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 Nothing will happen to the motor Motor will run at very slow speed This will make armature to take heavy current, possibly burning it ANSWER DOWNLOAD EXAMIANS APP
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