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- Subject
- Electrical Machine Designelectrical-engineering-mcqs › electrical-machine-design
- Published
- 22 Dec 2018
- Last updated
- 28 May 2026
Explanation
For large power transformers using self-oil cooling or air blast cooling methods, the suitable current density generally falls between 2.2 and 3.2 A/mm², as this range ensures efficient performance and thermal management.
More Electrical Machine Design MCQs
Practice related questions from the same subject.
- 1.How does the input impedance of a JFET compare to that of a conventional transistor?
- 2.What level of permeability does cold rolled grain-oriented steel exhibit along the grain direction?
- 3.What type of winding configuration is typically used in transformers when cylindrical coils are made with round conductors?
- 4.In transformers, multi-layer helical windings are typically employed as high voltage windings for which voltage range?
- 5.What type of magnetic permeability does cold-rolled grain-oriented steel exhibit along the grain direction?
- 6.In which type of transformer are helical windings typically employed?
- 7.Disc windings are mainly employed in which type of transformers?
- 8.For transformers with what capacity range is the forced circulation of oil and air commonly implemented?
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