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 A series motor will over speed when The armature circuit is opened. Load is removed The field is opened The load is increase The armature circuit is opened. Load is removed The field is opened The load is increase ANSWER DOWNLOAD EXAMIANS APP
DC Motors The back emf in a dc motor ______ Opposes the applied voltage Aids the armature current None of the listed here Aids the applied voltage Opposes the applied voltage Aids the armature current None of the listed here Aids the applied voltage ANSWER DOWNLOAD EXAMIANS APP
DC Motors Which of the following motors is most suitable for signalling devices and many kinds of timers ? Reluctance motor Induction motor C. shunt motor C. series motor Reluctance motor Induction motor C. shunt motor C. series motor ANSWER DOWNLOAD EXAMIANS APP
DC Motors The shaft torque in a dc motor is less than total armature torque because of ______ in the motor. Field losses Iron and friction losses None of the listed here Cu losses Field losses Iron and friction losses None of the listed here Cu losses 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% Anywhere between 75% and 90% 1 Less than 50% Around 90% Anywhere between 75% and 90% 1 Less than 50% ANSWER DOWNLOAD EXAMIANS APP
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