The Fourier number (defined as a.t/L2) is used in the analysis of problem involving heat transfer by_______________?
Correct answer: C. Transient conduction
- A. Forced convection
- B. Natural convection
- C. Transient conduction
- D. Steady state conduction
Explanation
The Fourier number, Fo = αt/L², compares heat diffusion through a body with the time available for diffusion. It is therefore the key dimensionless group in transient or unsteady conduction.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
Practise Heat Transfer Operations
645 free Heat Transfer Operations MCQs from Chemical Engineering, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Chemical Engineering questions like this
Chemical Engineering is on this paper prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for it.
More Heat Transfer Operations questions
The outlet temperature of cooling water in a heat exchanger is generally not allowed to exceed above 50°C in industrial practice mainly to avoid_________________?
Mechanical recompression evaporation is used in the production of____________________?
The local surface conductance for laminar film condensation on vertical surface is (where, t = film thickness) _________________?
Three solid objects of the same material and of equal mass-a sphere, a cylinder (length = diameter) and a cube are at 500°C initially. These are dropped in a quenching bath containing a large volume of cooling oil each attaining the bath temperature eventually. The time required for 90% change in temperature is the smallest for_________________?
Which of the following forced convection heat transfer equation accounts for the liquid viscosity effect for viscous liquids ?
For condensation of pure vapors, if the heat transfer co-efficients in filmwise and drop-wise condensation are respectively hf and hd, then__________________?