DC Motors The commutating winding is basically used in a dc machine To improve commutation None of the listed here To reduce armature reaction To control the speed of machine To improve commutation None of the listed here To reduce armature reaction To control the speed of machine ANSWER DOWNLOAD EXAMIANS APP
DC Motors If the supply voltage for a D.C. motor is increased, which of the following will decrease? Operating speed Starting torque All of these Full-load current Operating speed Starting torque All of these Full-load current ANSWER DOWNLOAD EXAMIANS APP
DC Motors The speed of a dc motor can be controlled by changing All of the listed here Armature circuit resistance Is flux Aplied voltage All of the listed here Armature circuit resistance Is flux Aplied voltage ANSWER DOWNLOAD EXAMIANS APP
DC Motors The armature torque of the D.C. shunt motor is proportional to field flux only armature current only None of these both (A) and (B) field flux only armature current only None of these both (A) and (B) ANSWER DOWNLOAD EXAMIANS APP
DC Motors Which of the following in a dc motor, can sustain the maximum temperature rise? Armature winding Commutator Slip rings Field winding Armature winding Commutator Slip rings Field winding ANSWER DOWNLOAD EXAMIANS APP
DC Motors Usually wide and sensitive speed control is desired in case of Colliery winders Steel rolling mills Centrifugal pumps Elevators Colliery winders Steel rolling mills Centrifugal pumps Elevators ANSWER DOWNLOAD EXAMIANS APP
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