Out of the following, TLV of _______________ is maximum (about 500 ppm)?
Correct answer: A. Carbon dioxide
- A. Carbon dioxide
- B. Toluene
- C. Carbon disulphide
- D. Acetaldehyde
Explanation
Carbon dioxide has the highest TLV among these substances, although the commonly quoted occupational limit is about 5,000 ppm, not 500 ppm. Toluene, carbon disulphide and acetaldehyde have substantially lower limits.
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