Tolerable limit of nitrogen oxides in air is _____________ ppm?

Related Mcqs:

The average thickness of ozone layer in stratosphere is about _______________ dobson unit (DU)?

A. 20 B. 230 C. 750 D. 1500...

Threshold limit value (TLV) means maximum permissible/acceptable concentration. TLV of phosgene in air is about ______________ ppm (parts per million)?

A. 0.002 B. 0.2 C. 1.2 D. 4.8...

80% less than 200 mesh size particles are called____________________?

A. Smoke B. Powder C. Grit D. Aggregates...

TLV of lead for public sewer/waste water is about ______________ ppm?

A. 1 B. 25 C. 150 D. 650...

Inhalation of lead compounds present in the automobile exhausts (using leaded petrol) causes________________?

A. Blood poisoning B. Anaemia C. Nervous system disorder D. All A., B. and C....