Heat And Mass Transfer (KME501) - AKTU Question Paper 2023-24
B.Tech · Semester 5 · Free PDF Download
This is the official AKTU Heat And Mass Transfer Previous Year Question Paper for B.Tech Semester 5, academic session 2023-24. Published by Dr. A.P.J. Abdul Kalam Technical University (AKTU/UPTU), Lucknow. Free PDF download — no login required.
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Questions Asked in 2023-24
Heat And Mass Transfer (KME501) — complete question paper · 100 marks · 3 Hours
- aDiscuss the effect of temperature on thermal conductivity o f metals. Write SI unit of thermal conductivity
- bDiscuss the concept of thermal resistance. 1
- cDefine unsteady state heat conduction. 2
- dDefine effectiveness of fin and efficiency of fin. 2
- eDifferentiate between natu ral and forced convection. 3
- fDraw velocity boundary lay er over a flat plate. 3
- gDescribe any 4 rules used i n determination of radiation shape factor. 4
- hExplain black body and gray body. 4 (i) Define Fouling factor used i n analysis of heat exchanger. 5 (j) What are the various m odes of mass transfer? 5
- aDerive a general heat conduc tion equation for Cartesian (re ctangular) coordinates
- bState the assumptions made in Lumped Parametric analysis. F or transient heat conduction, derive the following- θ/θi = exp(-Bi.Fo) where θ= T-Ta
- cExplain Reynolds analogy a nd colburn analogy. Obtain the ex pression for Nusselt Number for turbulent flow over flat plate using col burn analogy
- dState and prove the reciprocity theorem used to determine shape factor. 4
- eIllustrate the following- i) Fick’s Law of Mass diffusion ii) Film-wise and drop-wise condensation
- aDerive the expression for cri tical radius of insulation for a cylinder.A10 mm cable is to be laid in atmosphere of 20 oc with outside heat transfer coefficient 8.5 W/m 2o C. The surface temperature is likely to be 65 oC due to heat generation.Will the rubber insulation (K=0.155W/m2 oC ) be effective? If yes, determine the maximum effective thickness of insulation for maximum heat transfer rate
- bObtain the expression for steady state one dimensional heat transfer rate without heat generation through a hollow cylinder. A stainless steel tube (Ks=19W/mK) of 2 cm internal diameter 5 cm outer diameter is insulated with 3 cm thick asbest os (Ks=0.2 W/mK). If the temper ature difference between the innermos t and outermost surfaces is 600oC.Determine the heat transfer rate per unit length
- aDerive the expression for te mperature distribution for fin insulated at tip
- bThe aluminium square fins (0.5 mm x 0.5 mm) of 10 mm length a r e provided on a surface of semicon ductor device to carry 1 Watts of energy generated by electronic d evice. The temperature at surfa ce of device should not exceed 80oC, when surrounding temperature is 40Oc. Determine the number of fins required to carry out this duty. N eglect the heat loss room end of fins. Kaluminium= 200 W/moC and h = 15 W/m2
- aExplain the following dimensio nless numbers- Nusselt Number , Grashoff Number, Prandtl Number, and Stanton Number
- bEstimate The coefficient of heat transfer from a vertical p late (height and width=2m x 2m ) to the surrounding air at 25 oC.The plate surface temperature is 150 oC, Also calculate the rate of heat transfer from the p l a t e . F o r a i r a s s u m e t h e k i n e m a t i c v i s c o s i t y a s 1 6 X 1 0-6 m 2/s. The properties of air film temper ature are density 0.972Kg/m 3. Cp=1.0059KJ/KgK, K=3.13 W/mK, Pr = 0.69. The constant C and n in Nusselt number are-0.15 and 1/3
- aTwo large plates at temperatures 1000 K and 500 K have emis sivity of 0.5 and 0.7 respectively. A radiat ion shield having emissivity 0.1 on both sides is placed between the plates. Determine the percenta ge reduction in heat transfer rate
- bExplain the following - Kirchhoff’s Law of radiation, Steff an Boltzmann’s law of ra diation, absorptivit y, reflectivity and transmissibility of a surface
- aDerive an expression for effe ctiveness of a heat exchanger by NTU method for parallel flow
- bi) Draw boiling curve and a lso name regimes of pool boiling. ii)A counter flow heat exchanger is used to cool 50000 Kg/hr of a liquid from 65 oC to 40 oC using 40000 Kg/hr of water at 10 oC Determine the surface area of heat exchanger required. Take C p(liquid) = 3700J/KgK, Cp(water) = 4180J/KgK, Overall heat transfer coefficient as 580 W/m2K
Question text is extracted from the official AKTU question paper PDF above. Hindi translations are omitted — every question is printed in English in the original paper. Last verified: 2026-08-23.
Repeated Questions — KME501
Questions that appeared in more than one session, found by comparing 3 years of Heat And Mass Transfer papers (2021-22, 2022-23, 2023-24)
Define effectiveness of fin and efficiency of fin. 2
Appeared in: 2021-22 · 2023-24
Describe any 4 rules used i n determination of radiation shape factor. 4
Appeared in: 2022-23 · 2023-24
Derive a general heat conduc tion equation for Cartesian (re ctangular) coordinates
Appeared in: 2022-23 · 2023-24
State the assumptions made in Lumped Parametric analysis. F or transient heat conduction, derive the following- θ/θi = exp(-Bi.Fo) where θ= T-Ta
Appeared in: 2022-23 · 2023-24
Explain the following dimensio nless numbers- Nusselt Number , Grashoff Number, Prandtl Number, and Stanton Number
Appeared in: 2022-23 · 2023-24
Derive an expression for effe ctiveness of a heat exchanger by NTU method for parallel flow
Appeared in: 2021-22 · 2023-24
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