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? 210 350 900 450 210 350 900 450 ANSWER DOWNLOAD EXAMIANS APP
Transformers A common method of cooling a power transformer is oil cooling natural air cooling Any of these air blast cooling oil cooling natural air cooling Any of these air blast cooling ANSWER DOWNLOAD EXAMIANS APP
Transformers An ideal transformer is one which _______ Does not work Has same number of primary and secondary turns Has no losses and leakage reactance None of the listed here Does not work Has same number of primary and secondary turns Has no losses and leakage reactance None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Transformers Which of the following protection is normally not provided on small distribution transformers? Overfluxing protection Overcurrent protection Buchholz relay All of these Overfluxing protection Overcurrent protection Buchholz relay All of these 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 12 V 240 V 120 V 2,400 V 12 V 240 V 120 V 2,400 V ANSWER DOWNLOAD EXAMIANS APP
Transformers Efficiency of a power transformer is of the order of 98 per cent 25 per cent 50 per cent 100 per cent 98 per cent 25 per cent 50 per cent 100 per cent ANSWER DOWNLOAD EXAMIANS APP
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