Transformers How are transformers generally cooled for installations rated at less than 5kVA ? Oil cooled Water cooled Air cooled None of the listed here Oil cooled Water cooled Air cooled None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Transformers Sumpner's test is conducted on transformer to determine Temperature Stray losses All day efficiency None of the listed here Temperature Stray losses All day efficiency None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Transformers The efficiency of a transformer, under heavy loads, is comparatively low because secondary output is much less as compared to primary input iron loss is increased considerably voltage drop both in primary and secondary becomes large copper loss becomes high in proportion to the output secondary output is much less as compared to primary input iron loss is increased considerably voltage drop both in primary and secondary becomes large copper loss becomes high in proportion to the output ANSWER DOWNLOAD EXAMIANS APP
Transformers What kVA rating is required for a transformer that must handle a maximum load current of 8 A with a secondary voltage of 2 kV? 16 kVA 0.25 kVA 4 kVA 8 kVA 16 kVA 0.25 kVA 4 kVA 8 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 cool as there is no secondary current none of above will happen hot because of heavy iron losses taking place in it due to high flux density hot because primary will carry heavy current cool as there is no secondary current none of above will happen hot because of heavy iron losses taking place in it due to high flux density ANSWER DOWNLOAD EXAMIANS APP
Transformers Natural oil cooling is used for transformers upto a rating of 3000 kVA 1000 kVA 250 kVA 500 kVA 3000 kVA 1000 kVA 250 kVA 500 kVA ANSWER DOWNLOAD EXAMIANS APP
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