Asked in a 2000 paperModerate
A gas is termed as non-toxic, if its maximum permissible concentration (TLV) ranges from ______________ ppm?
Correct answer: D. 10000 to 100000
- A. 1000 to 2000
- B. 3000 to 6000
- C. 6000 to 9000
- D. 10000 to 100000
Explanation
A very high TLV, around 10,000 to 100,000 ppm, is associated with gases considered relatively non-toxic in ordinary industrial exposure classifications. Lower ppm limits usually indicate toxic or strongly irritating substances.
Written and checked by Zahid Hussain, MS Computer ScienceLast updated
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