A. 5
B. 50
C. 500
D. 5000
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Related Mcqs:
- Moist atmospheric air at high temperature (e.g., in summer) having high concentration of sulphur dioxide causes________________?
- A. Fading of dyes on textiles B. Corrosion, tarnishing & soiling of metals C. Reduced strength of textiles D. All A., B. and C....
- 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...
- Which of the following causes death by asphyxiation, if its presence in atmospheric air exceeds maximum allowable concentration (i.e. > 50 ppm) ?
- A. Benzopyrene B. Peroxyacetyl nitrate C. Carbon monoxide D. Sulphur dioxide...
- A gas is termed as non-toxic, if its maximum permissible concentration (TLV) ranges from ______________ ppm?
- A. 1000 to 2000 B. 3000 to 6000 C. 6000 to 9000 D. 10000 to 100000...
- Death may occur, when SO2 concentration in atmospheric air exceeds ______________ ppm?
- A. 20 B. 100 C. 400 D. 200...
- Higher concentration of nitrogen dioxide in atmospheric air causes___________________?
- A. Cancer B. Bronchitis C. Asphyxiation D. Corrosion...
- ‘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...
- Atmospheric pollution caused by the exhaust gas of supersonic transport air-crafts is mostly in the atmospheric region called________________?
- A. Thermosphere B. Stratosphere C. Troposphere D. Mesosphere...
- Maximum allowable concentration of CO2 in air for safe working is _____________ ppm (parts per million)?
- A. 50 B. 1000 C. 2000 D. 5000...
- TLV of ammonia, nitrogen dioxide and phenol vapor in air is ______________ ppm ?
- A. 5 B. 100 C. 1000 D. 2000...
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