Q. As per the world health organisation (WHO) specification, the maximum permissible concentration (i.e., TLV) of particulate matter in air is _________ μg/m3.(μg-microgram)

(A) 10
(B) 90
(C) 800
(D) 750

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✅ Correct Answer: (B) 90

Published by Nisha Gupta ⭐ 2.32K Points at 13-May-2023 02:33 pm in Environmental Engineering

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