6440 - mana results · explain o.c test and s.c test on transformer with a neat diagram. b) derive...
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Code: C16 EE-401
6440 BOARD DIPLOMA EXAMINATION
JUNE - 2019 DIPLOMA IN ELECTRICAL AND ELECTRONICS ENGINEERING
A.C. MACHINES -I FOURTH SEMESTER EXAMINATION
Time: 3 Hours Total Marks: 80
PART - A (3m x 10 = 30m) Note 1:Answer all questions and each question carries 3 marks 2:Answers should be brief and straight to the point and shall not exceed 5 simple sentences
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Code: C16 EE-401
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PART - B (10m x 5 = 50m)
Note 1:Answer any five questions and each carries 10 marks 2:The answers should be comprehensive and the criteria for valuation is the content but not the length of the answer
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LABPC-10
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Explain O.C test and S.C test on transformer with a neat diagram.
LABPC-10
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b) Derive an expression for saving of copper in auto transformer.
LABPC-10
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LABPC-10
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x x x
LABPC-10
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a) State any five advantages of 3-phase transformer over 1-phase transformer