Identify the incorrect statement from the following:

Explanation

Option C is incorrect because the fouling factor is a thermal resistance and its SI unit is actually square meters kelvin per watt (m²·K/W), not watts per square meter kelvin. The other statements are accurate: superheated steam has a low heat transfer film coefficient making it less suitable for process heating; orifice baffles create the maximum shell-side pressure drop in shell and tube exchangers; and longitudinal fins are used when fluid flow aligns with the tube axis.