Pick out the wrong statement?

A. When a vertical plate is heated in infinite air environmental under natural convection

B. ditions, the velocity profile in air, normal to the plate, exhibits a maximum

C. In process heat exchangers, saturated steam is preferred over the superheated steam

D. tted over the entire wavelength range is equal to emissivity

E. wavelength band between 3 ?m to 4 ?m. The fraction of this energy in the total energy

F. ?1. If the surface temperature is halved, the maximum in the emissive power would occur at