_ For annular flow of a fluid, the ratio of the equivalent diameter fo – McqOptions

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1.	_ For annular flow of a fluid, the ratio of the equivalent diameter for pressure drop calculation to the equivalent diameter for heat transfer calculation is$?
A.	D1/(d1 + d2)
B.	D2/(d1 + d2)
C.	(d1 + d2)/d1
D.	(d1 + d2)/d2
Answer» B. D2/(d1 + d2)

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