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? 900 210 350 450 900 210 350 450 ANSWER DOWNLOAD EXAMIANS APP
Transformers Power transformers are generally designed to have maximum efficiency around near full-load half-load 10% overload no-load near full-load half-load 10% overload no-load ANSWER DOWNLOAD EXAMIANS APP
Transformers The primary winding of a transformer has 110 V ac across it. What is the secondary voltage if the turns ratio is 8? 88 V 880 V 8,800 V 8.8 V 88 V 880 V 8,800 V 8.8 V ANSWER DOWNLOAD EXAMIANS APP
Transformers The main reason for generation of harmonics in a transformer could be mechanical vibrations saturation of core poor insulation fluctuating load mechanical vibrations saturation of core poor insulation fluctuating load ANSWER DOWNLOAD EXAMIANS APP
Transformers What is the approximate efficiency of large transformers? 95 % 65% 75% 85% 95 % 65% 75% 85% ANSWER DOWNLOAD EXAMIANS APP
Transformers Which of the following is not a fitting on a transformer? Commutator Buchholz's relay Breather Conservator Commutator Buchholz's relay Breather Conservator ANSWER DOWNLOAD EXAMIANS APP
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