Transformers MCQ - Electrician (Set-1) with Answers

Transformers MCQ - Electrician (Set-1) with Answers

36) The rated value of secondary voltage for single phase and three phase potential transformer as per IS. 3156 shall be

Answer is:

230 V and 400 V

37) In a transformer, the number of turns per volt is 6. The primary and secondary voltages are 240 V and 32 V respectively. Find the number of primary and secondary winding turns ?

Answer is:

1440 turns ; 192 turns

38) A 10 kVA transformer is taking a power of 400 watts in open circuit test and 900 watts in short circuit test. What will be the copper loss at 50% of load ?

Answer is:

225 watts

39) What will be the copper loss at half load, of the full load copper loss in 1600 watts ?

Answer is:

400 watts

40) The wattmeter reading of transformer on open circuit test is 900 W and on short circuit test at full load current is 1600 W. What will be the iron loss at half full load ?

Answer is:

900 watts

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