A 240 V/120 V, 12 kVA auto-transformer has 96.2% efficiency at full-lo – McqOptions

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1.	A 240 V/120 V, 12 kVA auto-transformer has 96.2% efficiency at full-load and unity power-factor. The full load efficiency at 0.85 pf lagging when connected to a load across 360 V would be
A.	89.5%
B.	92.8%
C.	98.5%
D.	88.9%
Answer» D. 88.9%

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