Heat Mass Transfer (BME501) - AKTU Question Paper 2025-26
B.Tech · Semester 5 · Free PDF Download
This is the official AKTU Heat Mass Transfer Previous Year Question Paper for B.Tech Semester 5, academic session 2025-26. Published by Dr. A.P.J. Abdul Kalam Technical University (AKTU/UPTU), Lucknow. Free PDF download — no login required.
Course:B.Tech
Semester:Semester 5
Session:2025-26
University:AKTU / UPTU
Rate this paper
Questions Asked in 2025-26
Heat Mass Transfer (BME501) — complete question paper · 70 marks · 3 Hours
Section AAttempt all q u e s t i o n s i n b r i e f . 02 x 7 = 14
- aDefine conduction, convection and radiation with one example each
- bThermal conductivity of copper is 400 W/mK. What heat flux occ urs across 5mm thickness when ∆T=30°C?
- cA composite wall has thermal resistances R1 and R2. Write expr ession for overall heat transfer coefficient
- dDefine the Lumped Capacitance Method
- eGive expression for Reynolds number and calculate for air flow V=20m/s
- fWhat is the Stefan-Boltzmann law, and how does it relate to th e emissive power of a blackbody?
- gWhat is LMTD and how is it used i n heat exchanger design?
Section BAttempt any three o f t h e f o l l o w i n g : 07 x 3 = 21
- aDerive general heat conduction equation in rectangular coord inates and solve heat flux for a wall 0.2m thick and k=25W/mK with ΔT=80°C
- bWrite expressions for the overall heat-transfer coefficient (U) for a composite wall under steady-state conduction
- cUsing transient conduction re lations and Heisler chart, esti mate center temperature of a steel plate (20mm) initially 25°C placed in 20 0°C furnace for 5 min (given α)
- dAir at 1 atm and 25°C flows over surface at 50°C. Using Colb urn analogy determine heat transfer coefficient if friction coefficient=0.005
- eRadiation emissivity of a surface is 0.6. Calculate heat emi tted at 800K compared with blackbody
Section CAttempt any one p a r t o f t h e f o l l o w i n g : 07 x 1 = 07
- aDerive expression of critical i nsulation radius for cylinder and compute the radius for insulation k=0.12W/mK, air film h=10W/m²K
- bA cylinder of diameter 40mm is insulated with material (k=0. 08W/mK). Calculate critical radius and heat transfer rate for surface te mperature 120°C, ambient 30°C
- aDerive temperature distribution in a uniform fin and calcula te fin efficiency for L=120mm, k=200W/mK, h=25, t=4mm
- bA pin fin of diameter 10mm, length 100mm loses heat to air a t 25°C, base at 120°C, h=22W/m²K, k=150W/mK. Find heat dissipation
- aDerive laminar flat plate heat transfer expression and using it calculate h for air at 25°C flowing at 2m/s, x=0.4m. What is average coefficient?
- bA vertical plate at 100°C exposed to air at 25°C. Using Chur chill–Chu correlation, estimate heat transfer coefficient (properties given)
- aExplain shape factor and determine shape factor between two parallel plates of 1m² area separated by 0.1m
- bA radiation shield (ε=0.1) is placed between two plates at 6 00K and 300K. Calculate reduction in radiation heat transfer
- aA counter flow heat exchanger cools water from 80→40°C using oil from 30→60°C. Calculate NTU and effec tiveness for U=400W/m²K and area=20m²
- bDraw the heat flux curve for various regions of flow boiling
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.
Heat Mass Transfer — Other Year Papers
AKTU Heat Mass Transfer PYQs from other sessions
More B.Tech Semester 5 (2025-26) Papers
Other subjects from same semester and session
Machine Design2025-26Essence Of Indian Traditional Knowledge2025-26Cloud Computing2025-26Design And Analysis Of Algorithm2025-26Constitution Of India2025-26Database Management System2025-26I C Engines Fuels Lubrication2025-26Artificial Intelligence2025-26
View all B.Tech Semester 5 2025-26 papers →Syllabus & More PYQs
Paper solve karne se pehle unit-wise syllabus dekh lo