ME 315 Quizizz 5

In evaporation problems, what is C_A?

• Convection

• Capacitance

• Concentration

• Specific heat

For this problem, air viscosity is needed to find the Reynolds number. At what temperature should you look up the value?

• 15 °C

• 30 °C

• 22.5 °C

For the same problem, you need the density of saturated water vapor at the surface (ρ_A,sat) to calculate the mass transfer. At what temperature should you look up ρ_A,sat?

• 30

• 15

• 22.5

Given the following correlation for heat transfer, Nu=0.52Re^1/2Pr^1/3, what is the proper correlation for mass transfer?

• Sc=0.52Re^1/2Sh^1/3

• Sh=0.52Re^1/2Sc^1/3

• Sh=0.52Re^1/2Pr^1/3

• Nu=0.52Re^1/2Sh^1/3

Condensation will

• heat a surface

• cool a surface

Consider a 20 cm flat plate with flow over the top surface. What flow condition would you use to find a correlation for the average heat transfer rate from the plate?

• Laminar

• Mixed

• Turbulent