Identify the incorrect statement regarding surface emissivity:

Chemical Heat Transfer MCQs for PPSC, FPSC, NTS, and Pakistan government job tests. Select an option below, then read the explanation.

PPSCFPSCNTSPakistan govt jobs
Subject
Chemical Heat Transferchemical-engineering › heat-transfer-chemical-engineering
Published
3 Mar 2019
Last updated
28 May 2026

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Choose the correct answer

Explanation

Option A is incorrect because corrosion typically increases the emissivity of a surface rather than decreasing it. Options B and C are correct since rougher surfaces emit more radiation and polished surfaces have lower emissivity. Option D is also true as emissivity of non-metallic materials tends to decrease with rising temperature.

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