GATE ME 2020 Set 2 — Question 61
Go beyond PYQs with Success TrackerAI-powered personalised practice and doubt support. Unlimited practice on eligible plans; AI usage limits apply.NAT+2 / -0MediumForced & Free ConvectionConvectionHeat Transfer
Heat Transfer → Convection → Forced & Free Convection
Last updated
Question
Water flows through a tube of internal diameter and length . The outside surface of the tube is heated electrically so that it is subjected to uniform heat flux circumferentially and axially. The mean inlet and exit temperatures of the water are and , respectively. The mass flow rate of the water is . Disregard the thermal resistance of the tube wall. The internal heat transfer coefficient is . Take specific heat of water as . The inner surface temperature at the exit section of the tube is ________ (round off to one decimal place).
Correct answer
85.1 to 86.1
Solution
1.Energy Balance to find total heat transfer rate ():
Mass flow rate .Specific heat .
2.Calculate Heat Flux ():
Since the heat flux is uniform:3.Calculate Inner Surface Temperature at Exit ():
Using Newton's law of cooling at the exit section:Rounding to one decimal place, .Continue learning with Success Tracker
A step still unclear? Work through it with support
Use Success Tracker to ask about the reasoning, then try another GATE ME question to check your understanding.
AI-powered practice· Unlimited practice on eligible plans
- PYQs with solutions
- Attempt available previous-year questions, then compare your reasoning with the worked solution. Coverage varies by stream.
- Practice that adapts
- Choose a topic, work on weaker areas and bookmark questions to revisit. Your attempts feed your progress tracking.
- AI doubt support
- Ask follow-up questions about a step or concept while practising, instead of stopping at the final answer.
Unlimited practice is available on eligible plans. Free practice and AI usage have limits; check the current plan allowances before choosing.
This page stays readable without an account. AI responses can be wrong; check them against the solution and source material.
More questions on Convection
2026 Set 1 Q27A quiescent fluid at temperature is confined between two vertical parallel plates. While…2026 Set 1 Q35A sphere of radius 5 mm is initially in equilibrium at 400 in a furnace. It is…2026 Set 1 Q43A very long fin of a uniform square cross-section is replaced by another very long fin of a uniform…2026 Set 1 Q54Two rectangular surfaces both having area are placed perpendicular to each other…2026 Set 1 Q55Convective heat transfer coefficients for Fluid 1 and Fluid 2 in a heat exchanger, as shown in the…