# Tertiary air is the air used to _____ ? with Answer - Mechanical Engineering Mcqs | TestPrep

> Solved MCQ: Tertiary air is the air used to _____ ? Correct Answer: E. convert CO (formed in lower zone of furnace) into C02 at higher zone. Verified answer explanation for FPSC, PPSC, MDCAT, NTS, and CSS competitive exam preparation.

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# Tertiary air is the air used to _____ ?

Direct Answer & Quick Reference

The correct option is **E. convert CO (formed in lower zone of furnace) into C02 at higher zone**.

A. provide air around burners for obtaining optimum combustion

B. transport and dry the coal

C. cool the scanners

D. supply air for ignitors

E. convert CO (formed in lower zone of furnace) into C02 at higher zone **(Correct Answer)**

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Verified Key: E. convert CO (formed in lower zone of furnace) into C02 at higher zone
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Verified against official examination board answer keys and standard curriculum textbooks.

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