1. What is the primary standard level for carbon monoxide for assuring air quality? a) 10ppm b) 90ppm c) 1ppm d) 9ppm AnswerAnswer: d [Reason:] The primary standard level for carbon monoxide is 9ppm. 2. The pulmonary section of the respiratory tract consists of _____ a) Nose and mouth as well as down till epiglottis…
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