TLV of ozone (O3) and phosgene (COCl2) in air is _______________ ppm?

Related Mcqs:

1. 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

2. Threshold limit value (TLV) i.e., the maximum permissible safe limit of phosgene gas which Hitler used to use to kill his enemies in ‘gas chamber’ is about ______________ ppm?

   A. < 1
   B. 10-100
   C. 100-200
   D. 100-1000

3. ‘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____________________?

   A. Industrial chimney exhaust
   B. Automobiles exhaust
   C. Photochemical reaction in polluted atmosphere
   D. Burning of domestic fuel

4. Threshold limit value (TLV) of CO in air is _____________ ppm?

   A. 5
   B. 50
   C. 2000
   D. 5000

5. TLV of ammonia, nitrogen dioxide and phenol vapor in air is ______________ ppm ?

   A. 5
   B. 100
   C. 1000
   D. 2000

6. Out of the following, TLV of _______________ is maximum (about 500 ppm)?

   A. Carbon dioxide
   B. Toluene
   C. Carbon disulphide
   D. Acetaldehyde

7. Permissible safe limit (TLV) of _____________ toxic gas is 100-1000 parts per million (ppm)?

   A. Highly
   B. Moderately
   C. Extremely
   D. Very extremely

8. Methyl isocyanate (MIC) gas (TLV <1 ppm), which caused Bhopal gas tragedy in 1984 falls under the category of ______________ toxic gas?

   A. Moderately
   B. Highly
   C. Extremely
   D. Very extremely

9. TLV of mercury in potable (drinking) water is about ______________ ppm?

   A. 0.001
   B. 0.1
   C. 1
   D. 5

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

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