Monday, January 30, 2023

Dr. A.P.J. Abdul Kalam University BE VI SEM (ME) Heat and Mass Transfer [ME-605] June 2021 Question Paper

Dr. A.P.J. Abdul Kalam University

Bachelor of Engineering

Sixth Semester Examination, June-2021

Heat and Mass Transfer [ME-605]


Time: 3:00 Hrs Max Marks 70

Note: (i) Attempt any five questions out of eight.

 (ii) All questions carry equal marks

 (iii) Answer should be precise and to the point only.

 (iv) Assume suitable data if necessary and state them clearly.

Q.1 (a) What is meant by Lumped-capacity? Explain?

(b) Define heat exchangers and explain its types?

Q.2 (a) Define heat exchangers effectiveness and explain its significances.

(b) Explain Nusselt’s Theory for the laminar film condensation on vertical plate

Q.3 (a) Discuss the mechanism of convention heat transfer with the help of neat


(b) Discuss Planck’s law of distribution applicable for a black body reaction.

Q.4 (a) Differentiate between free and forced convection with the help of suitable


(b) Where extended surfaces are used give suitable examples.

Q.5 (a) What is Molar diffusion velocity? Define mass transfer fluxes.

(b) What is Finn efficiency? Explain why fins are generally used on gas side in

Gas-to-Liquid heat exchangers?

Q.6 (a) Define thermal diffusivity and thermal resistance.

(b) Describe the mechanism of heat conduction in metals.

Q.7 (a) What is Pool boiling? How is the force conviction boiling different from pool


(b) What is radiation shield and write short note also.

Q.8 Define –

(a) Emissive power (b) Black surface

(c) Toe-in 

(d) Toe-out

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