Electrical Machines In a transformer the magnetic coupling between the primary and secondary winding can be increased by using transformer oil of better quality. using soft material for winding. increasing the number of turns. using the magnetic core of low reluctance. using transformer oil of better quality. using soft material for winding. increasing the number of turns. using the magnetic core of low reluctance. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following is/are the advantages of carbon brush over the copper brush? They are self lubricating in nature In case of any sparking they will be less damaged than copper brushes All of these They are not hard as copper brush They are self lubricating in nature In case of any sparking they will be less damaged than copper brushes All of these They are not hard as copper brush ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The efficiency of a transformer is mainly dependent on dielectric losses. core losses. copper losses. stray losses. dielectric losses. core losses. copper losses. stray losses. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The short circuit test on a transformer is conducted to obtain core loses only. eddy current loss. copper losses. hysteresis loss. core loses only. eddy current loss. copper losses. hysteresis loss. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which slots are used in the rotor of an induction motor? Closed slots. None of above. Open slots. Semi closed slots. Closed slots. None of above. Open slots. Semi closed slots. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In which of the following motors DC excitation is not required? 3-phase synchronous motor 3-phase synchronous generator reluctance motor hysteresis motor 3-phase synchronous motor 3-phase synchronous generator reluctance motor hysteresis motor ANSWER DOWNLOAD EXAMIANS APP
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