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Are any of the following monitors used to measure the concentration of particular gases from the exhaust generated in vehicles?

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in Environmental Engineering by (81.4k points)
Are any of the following monitors used to measure the concentration of particular gases from the exhaust generated in vehicles?

(a) Opacity monitors

(b) Gaseous emission monitors

(c) Opacity & Gaseous emission monitors

(d) None of the mentioned

The question was posed to me in an online interview.

The question is from Air Pollution topic in section Air Pollution of Environmental Engineering

1 Answer

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Best answer
Right answer is (b) Gaseous emission monitors

The best explanation: These monitors are used to measure the concentrations of certain gases such as oxygen, carbon monoxide, oxides of sulphur and nitrogen from the exhaust.

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