DC Motors By looking at which part of the motor, it can be easily confirmed that a particular motor is D.C. motor? Stator Shaft Commutator Frame Stator Shaft Commutator Frame ANSWER DOWNLOAD EXAMIANS APP
DC Motors The mechanical power developed by a shunt motor will be maximum when the ratio of back emf to applied voltage is 0.5 2.0 4.0 1.0 0.5 2.0 4.0 1.0 ANSWER DOWNLOAD EXAMIANS APP
DC Motors Which one of the following is not the function of pole shoes in a D.C. machine? To reduce eddy current loss To reduce the reluctance of the magnetic path To spread out flux for better uniformity To support the field coils To reduce eddy current loss To reduce the reluctance of the magnetic path To spread out flux for better uniformity To support the field coils ANSWER DOWNLOAD EXAMIANS APP
DC Motors For constant torque drive which speed control method is preferred? Mechanical loading system Shunt armature control Field control Armature voltage control Mechanical loading system Shunt armature control Field control Armature voltage control ANSWER DOWNLOAD EXAMIANS APP
DC Motors No load speed of which of the following motor will be highest? Differentially compounded motor Cummulative compounded motor Shunt motor Series motor Differentially compounded motor Cummulative compounded motor Shunt motor Series motor ANSWER DOWNLOAD EXAMIANS APP
DC Motors If conditions for maximum power for a dc motor are established, the efficiency of the motor will be 60 to 70 % Less than 50% 80 to 90 % 100 % 60 to 70 % Less than 50% 80 to 90 % 100 % ANSWER DOWNLOAD EXAMIANS APP
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