Electrical Machines The main purpose of providing tertiary winding in a three phase transformer is to interconnect three voltage systems. to suppress harmonic and unbalance in voltage. None of these to carry extra load. to interconnect three voltage systems. to suppress harmonic and unbalance in voltage. None of these to carry extra load. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines To avoid formation of grooves in the commutator the brushes of opposite polarity should track each other. brush position has no effect on the commutator grooving. the brushes of same polarity should track each other. None of these the brushes of opposite polarity should track each other. brush position has no effect on the commutator grooving. the brushes of same polarity should track each other. None of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In dc machines, the space waveform of the air-gap flux distribution affects both the torque and voltage torque but not the voltage neither the voltage nor the torque voltage but not the torque both the torque and voltage torque but not the voltage neither the voltage nor the torque voltage but not the torque ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Flux density under trailing pole tips in case of generator will decrease either increase or decrease increase None of these decrease either increase or decrease increase None of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The heat transfer by convection in a transformer least depends on air velocity. color of the paint. surface area. temperature difference. air velocity. color of the paint. surface area. temperature difference. 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 more than 90° shift forward by less than 90° shift forward by 90° coincide with the GNA shift forward by more than 90° shift forward by less than 90° ANSWER DOWNLOAD EXAMIANS APP
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