Transformer Multiple Choice Questions and Answers

21. The transformer ratings are usually expressed in.......

   A.Volts

   B.Amperes

   C.Kw

   D.Kva

22. Which of the following does not change in an ordinary transformer........

   A.Frequency

   B.Voltage

   C.Current

   D.Any of the above

23. Star/star transformers work satisfactorily when........

   A.Load is unbalanced onlyα

   B.Load is balanced onlyα

   C.On balanced as well as unbalanced loadsα

   D.None of the aboveα

24. Delta/star transformer works satisfactorily when........

   A.Load is balanced only

   B.Load is unbalanced only

   C.On balanced as well as unbalanced loads

   D.None of the above

25. Harmonics in transformer result in........

   A.Increased core losses

   A.Increased I²R losses

   C.Magnetic interference with communication circuits

   D.All of the above

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