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.Management Sciences
Category: Chemical Environmental Engineering
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
Sulphur dioxide present in the industrial chimney exhaust gases causes____________________?
A. Respiratory & lung disease
B. Reduction in plant’s productivity owing to acid rain
C. Corrosion of building materials
D. All A., B. and C.
Pick out the wrong statement. A. Caustic embrittlement of boiler’s metallic parts is caused by high concentration of caustic soda in boiler feed water___________________?
B. Cooling and freezing of water kills the bacteria present in it
C. With increasing boiler operating pressure of steam, the maximum allowable concentration of
silica in feed water goes on decreasing
D. Dissolved oxygen content in high pressure boiler feed water should be nil
Inhalation of silica dust causes a disease called__________________?
A. Bronchitis
B. Silicosis
C. Pneumoconiosis
D. None of these
Biological oxidation ponds remove organic matters present in the polluted water by _______________?
A. Using the activities of bacteria and other micro organisms
B. Aerobic oxidation
C. Both A. & B.
D. Neither A. nor B.
Which of the following industries discharge mercury as a pollutant ?
A. Chloro-alkali industry
B. Tanneries
C. Beverage plant
D. Phosphoric acid plant
Which of the following sources is responsible for maximum air pollution ?
A. Industrial chimney exhaust
B. Forest fire
C. Automobiles exhaust
D. Photochemical oxidation of organic matter
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