Success TrackerSuccess Tracker
Log inSign up

GATE ME 2020 Set 2 — Question 34

Go beyond PYQs with Success TrackerAI-powered personalised practice and doubt support. Unlimited practice on eligible plans; AI usage limits apply.
NAT+1 / -0MediumComposite Wall ConductionConductionHeat Transfer

Heat Transfer → Conduction → Composite Wall Conduction

Last updated

Question

In a furnace, the inner and outer sides of the brick wall (k1=2.5k_1 = 2.5 W/m.K) are maintained at 1100∘1100^\circ C and 700∘700^\circ C, respectively as shown in figure.
Diagram showing a composite wall with brick wall and insulation, temperatures, and heat flux
The brick wall is covered by an insulating material of thermal conductivity k2k_2. The thickness of the insulation is 1/4th1/4^{\text{th}} of the thickness of the brick wall. The outer surface of the insulation is at 200∘200^\circ C. The heat flux through the composite walls is 25002500 W/m2^2.
The value of k2k_2 is ______ W/m.K (round off to one decimal place).
Your answer

Enter a number. Decimals, negative values and scientific notation are accepted.

The solution stays hidden until you check.

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.

Start with a free accountView plans and allowances

This page stays readable without an account. AI responses can be wrong; check them against the solution and source material.

More questions on Conduction

2026 Set 1 Q27A quiescent fluid at temperature T3T_3 is confined between two vertical parallel plates. While…2026 Set 1 Q35A sphere of radius 5 mm is initially in equilibrium at 400 ∘C^\circ\text{C} 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 1 m21 \text{ m}^2 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…