Equivalent diameter for heat transfer calculation for a duct of square cross-section having each side as 'd' will be
A. d
B. $$\sqrt {\text{d}} $$
C. $$\sqrt {2\pi {\text{d}}} $$
D. $$\sqrt {2{\text{d}}} $$
Answer: Option A
This Question Belongs to Chemical Engineering >> Process Equipment And Plant Design
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