1.

Which one of the following dirt factor should we assign to the HE for two moderately clean streams?

A. U<sub>D</sub> = 20, U<sub>C</sub> = 30
B. U<sub>D</sub> = 40, U<sub>C</sub> = 50
C. U<sub>D</sub> = 50, U<sub>C</sub> = 60
D. U<sub>D</sub> = 100, U<sub>C</sub> = 110
Answer» B. U<sub>D</sub> = 40, U<sub>C</sub> = 50


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