DC Motors If a D.C. motor is to be selected for conveyors, which rriotor would be preferred ? Cumulative compound motor Differentially compound motor Shunt motor Series motor Cumulative compound motor Differentially compound motor Shunt motor Series motor ANSWER DOWNLOAD EXAMIANS APP
DC Motors A dc series motor is that which Can be started easily without load Has a poor torque Has almost constant speed Has its field winding consisting of thick wire and less turns Can be started easily without load Has a poor torque Has almost constant speed Has its field winding consisting of thick wire and less turns 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 Less than 50% 1 Around 90% Anywhere between 75% and 90% Less than 50% 1 Around 90% Anywhere between 75% and 90% ANSWER DOWNLOAD EXAMIANS APP
DC Motors The commutating pole winding is connected in Series-parallel with the armature Series with the armature None of the listed here Parallel with the armature Series-parallel with the armature Series with the armature None of the listed here Parallel with the armature ANSWER DOWNLOAD EXAMIANS APP
DC Motors Which of the following losses are significantly reduced by laminating the core of a D.C. generator? Windage losses Eddy current losses Copper losses Hysteresis losses Windage losses Eddy current losses Copper losses Hysteresis losses ANSWER DOWNLOAD EXAMIANS APP
DC Motors As there is no back e.m.f. at the instant of starting a D.C. motor, in order to prevent a heavy current from flowing though the armature circuit A high value resistor is connected across the field winding A resistance is connected parallel to the armature A resistance is connected in series with armature Armature is temporarily open circuited A high value resistor is connected across the field winding A resistance is connected parallel to the armature A resistance is connected in series with armature Armature is temporarily open circuited ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS