GATE 2025 AR — Architecture – Question 22

Building Construction, Materials, and Structural Systems · Building materials characteristics & applications · 1 mark · Multiple choice

Under the NBC 2016 comparison in the paper, choose increasing embodied energy.

MDF < Aluminium < Float glass < Fly-ash bricks
Fly-ash bricks < MDF < Float glass < Aluminium
MDF < Fly-ash bricks < Float glass < Aluminium
Fly-ash bricks < Aluminium < MDF < Float glass

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Correct answer: (B) Fly-ash bricks < MDF < Float glass < Aluminium

Explanation

The specified order is fly-ash bricks, medium-density fibreboard, float glass, aluminium, B. Primary aluminium production is especially energy-intensive; glass melting also requires substantial process heat. The comparison is the source’s material-basis ordering, not a claim that equal-volume finished assemblies always follow the same energy ranking.

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