Electrical Machines In travelling cranes for crane travel, trolley and boom hoist which motor is preferred? Synchronous motor. Stepper motor. DC differential compound motor. Slip ring induction motor. Synchronous motor. Stepper motor. DC differential compound motor. Slip ring induction motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC compound motor the field regulator is provided to demagnetize the field partially. limit the armature current. control the armature flux. control the field flux. demagnetize the field partially. limit the armature current. control the armature flux. control the field flux. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Tap changer is generally provided in earthing transformer. voltage transformer. power transformer. current transformer. earthing transformer. voltage transformer. power transformer. current transformer. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The power factor of squirrel cage induction motor is low at heavy loads only low at light loads only both A and B low at rated load only low at heavy loads only low at light loads only both A and B low at rated load only ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines It is advisable to start a DC series motor with some load to Limit the speed. Limit the current. Limit the flux. Avoid sparking. Limit the speed. Limit the current. Limit the flux. Avoid sparking. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What will be the eddy current loss if the supply frequency of a transformer becomes double? Doubled. Remains same. Four times. Eight times. Doubled. Remains same. Four times. Eight times. ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS