DC Motors Motor starter are essential for Accelerating the motor Avoiding excessive starting current Preventing fuse blowing Starting the motor Accelerating the motor Avoiding excessive starting current Preventing fuse blowing Starting the motor ANSWER DOWNLOAD EXAMIANS APP
DC Motors Which one of the following is not the function of pole shoes in a D.C. machine? To support the field coils To spread out flux for better uniformity To reduce the reluctance of the magnetic path To reduce eddy current loss To support the field coils To spread out flux for better uniformity To reduce the reluctance of the magnetic path To reduce eddy current loss ANSWER DOWNLOAD EXAMIANS APP
DC Motors The armature torque of the D.C. shunt motor is proportional to armature current only None of these both (A) and (B) field flux only armature current only None of these both (A) and (B) field flux only 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 1.0 2.0 4.0 0.5 1.0 2.0 4.0 ANSWER DOWNLOAD EXAMIANS APP
DC Motors In a D.C. series motor, if the armature current is reduced by 50%, the torque of the motor will be equal to 25% of the previous value 10% of the previous value 100% of the previous value 50% of the previous value 25% of the previous value 10% of the previous value 100% of the previous value 50% of the previous value ANSWER DOWNLOAD EXAMIANS APP
DC Motors The power mentioned on the name plate of an electric motor indicates The power drawn in kW The power drawn in kVA The gross power The output power available at the shaft The power drawn in kW The power drawn in kVA The gross power The output power available at the shaft ANSWER DOWNLOAD EXAMIANS APP
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