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1. |
When the total heat of steam is h kJ/kg and the sensible heat of feed water is hf1 kJ/kg, then the factor of evaporation is given by |
A. | h - hf1)/2257 |
B. | h + hf1)/2257 |
C. | h × hf1)/2257 |
D. | one of these |
Answer» B. h + hf1)/2257 | |