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)?
Correct answer: B. 90
- A. 10
- B. 90
- C. 800
- D. 750
Explanation
The older WHO permissible limit commonly quoted for particulate matter in air is 90 μg/m³. The much larger values are associated with heavily polluted or industrial conditions, not the recommended ambient limit.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
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.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
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
Presence of _____________ bacteria in water causes disease like typhoid?
Which of the following is the most lethal water pollutant ?
The detrimental effect on organism and water quality with temperature rise of aquatic system is the reduction of _____________ of water?
Threshold limit value (TLV) means maximum permissible/acceptable concentration. TLV of phosgene in air is about ______________ ppm (parts per million)?
Out of the following, TLV of _______________ is maximum (about 500 ppm)?
Fine grit present in sewage is removed in the _____________ during sewage treatment?