Electrical Machines In a DC compound motor the field regulator is provided to demagnetize the field partially. control the armature flux. control the field flux. limit the armature current. demagnetize the field partially. control the armature flux. control the field flux. limit the armature current. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following represents the pitch factor? sin (α/2) Cos α² Cos α Cos (α/2) sin (α/2) Cos α² Cos α Cos (α/2) ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In speed control of DC shunt motor by varying field flux, what may be the value of field regulator? 2 ohm. 100 ohm 10 ohm 0.2 ohm 2 ohm. 100 ohm 10 ohm 0.2 ohm ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a dc generator operating on load with its brushes on the geometrical neutral axis (GNA), the magnetic neutral axis (MNA) is shifted in the direction of rotation. Now, if the brushes are given a lead of 90° (electrical), then the MNA will shift forward by 90° coincide with the GNA shift forward by less than 90° shift forward by more than 90° shift forward by 90° coincide with the GNA shift forward by less than 90° shift forward by more than 90° ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The 3 - Φ induction motor with rotor circuit open will make noise. get over heated. not run. run normally. make noise. get over heated. not run. run normally. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Motors for fans and pumps are selected in the rpm range 1440 to 2880. 375 to 500. 500 to 720. 720 to 920. 1440 to 2880. 375 to 500. 500 to 720. 720 to 920. ANSWER DOWNLOAD EXAMIANS APP
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