Chemical Engineering - MCQ Practice Questions

For turbulent flow in a rough pipe, the friction factor is determined by both Reynolds number and relative roughness (ε/D). According to the Moody chart, in the complete turbulence zone, the friction factor becomes independent of:

The Peclet number (Pe = Re·Pr) is used to determine the relative importance of convection to conduction. For Pe << 1, which heat transfer mechanism is dominant?

A shell-and-tube heat exchanger with one shell pass and two tube passes (1-2 STHE) has a correction factor F. What is the typical range of F values?

In convective heat transfer, which dimensionless number represents the ratio of buoyant to viscous forces?

For radiation heat transfer between two surfaces, increasing the absolute temperature of the hot surface by 10% will increase radiative heat transfer by approximately what percentage?

The overall heat transfer coefficient U in a composite system (series resistances) is determined by which method?

In pool boiling, the critical heat flux (CHF) occurs at which point on the boiling curve?

The Prandtl number (Pr = Cp·μ/k) represents the ratio of which two transport properties?

In a multipass heat exchanger design, increasing the number of shell passes from 1 to 2 will predominantly affect which parameter?