Transformers The dielectric strength of transformer oil is expected to be 100 kV 33 kV 330 kV lkV 100 kV 33 kV 330 kV lkV ANSWER DOWNLOAD EXAMIANS APP
Transformers A transformer operates poorly at very low frequencies because _____ None of the listed here Magnetising current is abnormally high Permeability of core is increased Primary reactance is too much increased None of the listed here Magnetising current is abnormally high Permeability of core is increased Primary reactance is too much increased ANSWER DOWNLOAD EXAMIANS APP
Transformers What is the coefficient of coupling for a transformer in which 4% of the total flux generated in the primary does not pass through the secondary? 4 0.96 9.6 0.4 4 0.96 9.6 0.4 ANSWER DOWNLOAD EXAMIANS APP
Transformers In an auto transformer, the primary and secondary are _____ coupled. None of the listed here Magnetically as well as electrically Only electrically Only magnetically None of the listed here Magnetically as well as electrically Only electrically Only magnetically ANSWER DOWNLOAD EXAMIANS APP
Transformers Natural oil cooling is used for transformers upto a rating of 250 kVA 3000 kVA 500 kVA 1000 kVA 250 kVA 3000 kVA 500 kVA 1000 kVA ANSWER DOWNLOAD EXAMIANS APP
Transformers When secondary of a current transformer is open-circuited its iron core will be hot because primary will carry heavy current hot because of heavy iron losses taking place in it due to high flux density none of above will happen cool as there is no secondary current hot because primary will carry heavy current hot because of heavy iron losses taking place in it due to high flux density none of above will happen cool as there is no secondary current ANSWER DOWNLOAD EXAMIANS APP
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