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GCC Factories Plant Engineering Exam Practice Questions - GCC Factories Engineer - Plant Engineering Examination (South Africa) Exam

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A 500 kVA, 11 kV / 400 V distribution transformer has a full-load copper loss of 4.5 kW and an iron loss of 2.5 kW. What is the efficiency of the transformer at full load operating at a power factor of 0.8 lagging?
Correct Answer:
98.28%

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