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3 of 25 questions on this paper were also asked in other years. Each is marked below with the years it appeared.See all 3 repeated 2151909 questions, most asked first
A long carbon steel rod of length 40 cm and diameter 10 mm (k = 40 w/mK) is placed in such that one of its end is 400° C and the ambient temperature is 30° C. the flim co-efficient is 10 w/m²K. Determine: The temperature at the mid length of the fin.
Derive equations of temperature distribution and heat dissipation for Fin insulated at tip.
A counter flow heat exchanger is employed to cool 0.55 kg/s (Cp = 2.45 kj/kg°C) of oil from 115°C to 40°C by the use of water. The inlet and outlet temperature of cooling water are 15°C and 75°C respectively. The overall heat transfer coefficient is expected to be 1450 W/m²°C. By using NTU method calculate mass flow of water.
What is difference between conduction, convection and radiation mode of heat transfer.
Also asked in Summer 2026 Q1a
Derive the two dimensional energy equation for thermal boundary layer over a flate plate.
Derive equation of net heat transfer by radiation between two infinite parallel plates.
Also asked in Summer 2026 Q4c OR
Differentiate between 1. Subcooled and saturated boiling 2. Nucleate and film boiling
The temperature at the inner and outer surfaces of a boiler wall made of 20 mm thick steel and covered with an insulating material of 5 mm thickness are 300° C and 50° C respectively. If the thermal conductivities of steel and insulating material are 58W/m °C and 0.116 W/m °C respectively, determine the rate of heat flow through the boiler wall.
Derive expression for temperature distribution, under one dimensional steady state heat conduction for the hollow cylinder.
Questions repeat across sessions. Working through two or three papers shows you which topics GTU asks most.
BE Mechanical
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Official Gujarat Technological University (GTU) examination paper for Heat Transfer (Summer 2025, B.E. · Mechanical Engineering, Sem 5). Features complete 70-mark regular & remedial examination pattern, official marking distribution across all 5 questions, and direct 1-click official PDF download.
Transcribed for student exam preparation from Gujarat Technological University official examination archives. Questions, syllabus guidelines, and curriculum marking schemes remain the intellectual property of Gujarat Technological University.
2151909 Heat Transfer
Official GTU PDF · Summer 2025
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