'Safe limit' called Threshold Limit Value (TLV) of carbon monoxide in atmospheric air is < 50 ppm. The main source of carbon monoxide pollutant in air is the____________________?
Correct answer: B. Automobiles exhaust
- A. Industrial chimney exhaust
- B. Automobiles exhaust
- C. Photochemical reaction in polluted atmosphere
- D. Burning of domestic fuel
Explanation
Automobile engines produce carbon monoxide when fuel burns incompletely, especially under fuel-rich conditions. Industrial chimneys and domestic combustion also contribute, but transport exhaust is the principal source commonly identified for atmospheric CO.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
Practise Chemical Process Principles
2,710 free Chemical Process Principles MCQs from Chemical Engineering, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Chemical Engineering questions like this
Chemical Engineering is on this paper prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for it.
More Chemical Process Principles questions
_____________ plant emits large amount of SO2 as an air pollutant?
The main type of sludge gas evolved during sewage treatment in Imhoff tank is___________________?
Brown spots in fabrics will be caused by washing with water containing large amount of___________________?
Which of the following is an adsorbent used for the removal of SO2 from gas/air ?
Radioactive solid nuclear wastes are disposed off by _________________?
Presence of nitrogen in high concentration in contaminated air reduces partial pressure of oxygen in lungs, thereby causing asphyxia (suffocation) leading to death from oxygen deficiency. Concentration of N2 in contaminated air at which it acts as a natural asphyxiate is ≥ _____________ percent?