Advanced Heat Transfer-II Question Paper 2012 for BPUT M.Tech in Thermal Engineering is given below. Only the short type questions are given here. You can download the full question PDF from the below given download link. Only www.questiondekho.com provides the M.Tech Previous year questions. This Advanced Heat Transfer-II Question Paper was asked in 2nd sem M.Tech Mechanical Engineering Exam for 2011 admission batch.
SECOND SEMESTER EXAMINATION 2012
Advanced Heat Transfer-II Question Paper 2012
(CONVECTIVE HEAT AND MASS TRANSFER)
Full Marks — 70
Time — 3 hours
Answer Question No. 1 which is compulsory and any five from the rest.
The figures in the right hand margin indicate marks
Q.1. Answer the following questions in brief: 2x 10
(a) What is the difference between Reynolds analogy and Prandtl analogy of heat flow through the boundary layer of a flat plate?
(b) What is the difference between advection and diffusion?
(c) What is the difference between friction factor and co-efficient of friction? Write down for laminar flow in a tube the expression of co-efficient of friction in terms of Reynolds number.
(d) Show that the co-efficient of volumetric expression (ß) for an ideal gas is ß= 1/T where T is absolute temperature of the gas.
(e) What is the physical significance of Grashof number with reference to heat transfer by natural convection? What is Rayleigh number? What do you mean by critical value of Rayleigh number’?
(f) What is critical heat flux? What is its importance? Show it on the regime of boiling.
(g) Assuming laminar film condensation, calculate the rate of the heat transfer on a vertical tube to that for a horizontal tube of same diameter D and length L.
(h) In a definition of effectiveness explain why a minimum heat capacity value (Cmin) is used for the maximum possible rate of heat transfer.
(i) Define Fick’s law of diffusion. What is mass diffusivity? What is its dimension?
(j) Define and explain the physical significance of Lewis number and Sherwood number.
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