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.Management Sciences
Category: Chemical Environmental Engineering
Removal of ______________ results from the disinfection of water?
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A. Turbidity
B. Odour
C. Hardness
D. Bacteria
The ratio of oxygen available to the oxygen required for stabilisation of sewage is called the __________________?
A. Bacterial stability factor
B. Relative stability
C. Biological oxygen demand (BOD)
D. Oxygen ion concentration
Radioactive solid nuclear wastes are disposed off by _________________?
A. High temperature incineration
B. Pathological incineration
C. Pyrolysis
D. Underground burial in concrete containers
Higher concentration of nitrogen dioxide in atmospheric air causes___________________?
A. Cancer
B. Bronchitis
C. Asphyxiation
D. Corrosion
Presence of nitrates in water in excess of 50 ppm causes________________?
A. Methemoglobinemia
B. Gastroenteritis
C. Asphyxiation
D. Tooth decay
High concentration of carcinogenic hydrocarbon pollutants in atmospheric air causes____________________?
A. Cancer
B. Silicosis
C. Respiratory disease (e.g., asthma)
D. Reduced crop yield
Lung cancer & DNA breakage are the major ill effects of excessive ozone exposure to human beings. Ozone layer depletion in the atmosphere is mainly caused by the presence of________________?
A. CO2
B. SO2
C. Hydrocarbons
D. CFC (chloro fluoro carbon)
In troposphere (the weather domain), the temperature ‘t’ at height ‘h’ above the spa level in metres is given by (where, temperature at sea level is 15°C and t is in °C ?
A. t = 15 – 0.0065h
B. t = 15 + 0.0065h
C. t = 0.0035h -15
D. t = 15 – 0.0035h
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