Transformers A common method of cooling a power transformer is natural air cooling air blast cooling oil cooling Any of these natural air cooling air blast cooling oil cooling Any of these ANSWER DOWNLOAD EXAMIANS APP
Transformers Power transformers are generally designed to have maximum efficiency around half-load no-load 10% overload near full-load half-load no-load 10% overload near full-load ANSWER DOWNLOAD EXAMIANS APP
Transformers When the turns ratio of a transformer is 20 and the primary ac voltage is 12 V, the secondary voltage is 240 V 12 V 120 V 2,400 V 240 V 12 V 120 V 2,400 V ANSWER DOWNLOAD EXAMIANS APP
Transformers The main reason for generation of harmonics in a transformer could be fluctuating load mechanical vibrations saturation of core poor insulation fluctuating load mechanical vibrations saturation of core poor insulation ANSWER DOWNLOAD EXAMIANS APP
Transformers Which of the following transformer should never have the secondary open circuited while the primary is energised? Power transformer Auto transformer Current transformer Potential transformer Power transformer Auto transformer Current transformer Potential transformer ANSWER DOWNLOAD EXAMIANS APP
Transformers A transformer has 200 W as iron loss at full load. The iron loss at full load. The iron loss at half full load will be 100 W 400 W 50 W 200 W 100 W 400 W 50 W 200 W ANSWER DOWNLOAD EXAMIANS APP
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