What is the eight-hour safe exposure limit for carbon monoxide? - Job.in

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Saturday, 31 July 2021

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What is the eight-hour safe exposure limit for carbon monoxide?

 What is the eight-hour safe exposure limit for carbon monoxide?

1) 15ppm
2) 25ppm
3) 125ppm
4) 250ppm 


Ans_____2) 25ppm

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