Pick out the wrong statement.
A)In case of heat transfer by purely forced convection, GR/Re 2 ? 1
B)The equivalent diameter of heat transfer for a duct of square cross-section (having each side as'x') is equal to 4x
C)Distillation process is not the same as evaporation
D)The effectiveness of nucleate boiling depends basically on the ease with which the bubbles are formed and detached from the heating surface

Question

Quizplus · Accepted Answer

The equivalent diameter (De) for a duct of square cross-section is defined as De = 4(A/P), where A is the cross-sectional area and P is the wetted perimeter. For a square duct with each side as 'x', A = x^2 and P = 4x, so De = 4(x^2)/(4x) = x, not 4x.

Pick Out the Wrong Statement