Transformer Multiple Choice Questions and Answers
21. The transformer ratings are usually expressed in.......
A.Volts
B.Amperes
C.Kw
D.Kva
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D.Kva
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22. Which of the following does not change in an ordinary transformer........
A.Frequency
B.Voltage
C.Current
D.Any of the above
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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
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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
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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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