Which of the following is the correct formula for calculating boiler

1.	Which of the following is the correct formula for calculating boiler efficiency?
A.	η = \(\frac{(h-h_{f1})}{C} \)
B.	η = \(\frac{m_a (h-h_{f1})}{C} \)
C.	η = \(\frac{m_a (h_{f1}-h}{C} \)
D.	η = \(\frac{m_a (h-h_{f1})}{2257} \)
Answer» C. η = \(\frac{m_a (h_{f1}-h}{C} \)

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Which of the following is the correct formula for calculating boiler efficiency?

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