Transformers When the secondary of a transformer is short circuited, the primary inductance _______ Remians unchanged Is increased None of the listed here Is decreased Remians unchanged Is increased None of the listed here Is decreased ANSWER DOWNLOAD EXAMIANS APP
Transformers A common method of colling a power transformer is Any of the listed here Air blast cooling Natural air cooling Oil cooling Any of the listed here Air blast cooling Natural air cooling Oil cooling ANSWER DOWNLOAD EXAMIANS APP
Transformers The no load ratio of a 50 Hz single phase transformer is 6000/250 V. The maximum flux in the core is 0.06 Wb. What is the number of primary turns? 210 900 350 450 210 900 350 450 ANSWER DOWNLOAD EXAMIANS APP
Transformers The transformer that should never the secondary open circuited when primary is energised is _______ Auto transformer Current transformer Voltage transformer Power transformer Auto transformer Current transformer Voltage transformer Power transformer ANSWER DOWNLOAD EXAMIANS APP
Transformers Natural oil cooling is used for transformers up to a rating of 250 kVA 500 kVA 3000 kVA 1000 kVA 250 kVA 500 kVA 3000 kVA 1000 kVA ANSWER DOWNLOAD EXAMIANS APP
Transformers If a power transformer is operated at very high frequencies, then ______ Core losses will be excessive Primary will draw large power Primary reactance is too much increased None of the listed here Core losses will be excessive Primary will draw large power Primary reactance is too much increased None of the listed here ANSWER DOWNLOAD EXAMIANS APP
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