Inhalation of silica dust by human being causes ___________________?

Related Mcqs:

The effect of increase in carbon dioxide level of the atmosphere and its profound effect on our climate is called the ________________?

A. Catalytic conversion B. Green house effect C. Global warming D. Both B. and C....

Presence of _____________ bacteria in water causes disease like typhoid?

A. Aerobic B. Pathogenic C. Anaerobic D. Non-pathogenic...

Bacterial aerobic oxidation of polluted water in biological oxidation ponds is done to purify it. Presence of bacteria helps in____________________?

A. Coagulation and flocculation of colloids B. Oxidation of carbonaceous matter to CO2 C. Nitrification or oxidation of ammonia derived from breakdown of nitrogenous organic matter to the nitrite and eventually to the nitrate D. All A., B. and C....

‘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...

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

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