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- Subject
- Transformerselectrical-engineering-mcqs › transformers
- Published
- 28 Jun 2018
- Last updated
- 28 May 2026
Explanation
Among the various parts of a transformer, the insulation surrounding the windings is the most susceptible to deterioration due to overheating. While the iron core and copper coils can tolerate heat to some extent, the insulation material degrades faster when exposed to high temperatures, potentially leading to transformer failure.
More Transformers MCQs
Practice related questions from the same subject.
- 1.Identify the incorrect statement about an ideal single-phase transformer with a turns ratio of 1:2, which draws 10 A from a 200 V AC source.
- 2.In a transformer operating at a fixed voltage, which losses stay constant regardless of variations in load?
- 3.Which type of losses are present in rotating electrical machines but are absent in transformers?
- 4.How does the eddy current loss change when the frequency of a fixed applied voltage is increased?
- 5.Why are approximately 10% of the end turns in a power or distribution transformer heavily insulated?
- 6.Which type of transformer core construction results in reduced core losses and enhanced permeability?
- 7.What is the common term for the sound generated by a transformer?
- 8.Which component of a transformer can be seen externally?
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