A. Grit
B. Dust
C. Powder
D. Smoke
A. By chemical coagulation
B. In sedimentation tanks equipped with mechanical scrapper
C. In vacuum filter
D. In clarifiers
A. Dissolved gases
B. Suspended solids
C. Dissolved solids
D. None of these
Removal of ______________ is accomplished by aeration of water? Read More »
Chemical Environmental Engineering A. CO
B. SO2
C. NO2
D. CO2
Which of the following pollutants, if present in atmosphere is detectable by its odour ? Read More »
Chemical Environmental Engineering A. Lagooning
B. Activated carbon adsorption
C. Biological oxidation pond
D. Chemical coagulation
A. 0.01
B. 0.1
C. 1
D. 4
A. Sedimentation
B. Skimming off
C. Chlorination
D. Biological oxidation
A. Ion exchange process
B. Oxidation followed by settling & filtration
C. Lime soda process or manganese zeolite process
D. Chlorination
Iron & manganese present as pollutant in water cannot be removed by__________________? Read More »
Chemical Environmental Engineering A. Characterisation of solid wastes
B. Organic concentration in gaseous effluents
C. Characterisation of liquid effluents
D. Characterisation of boiler feed water
A. ‘Green house’ (made of glass) allows visible sunlight (i.e., short wavelength solar radiation
like ultra-violet rays) to pass through the glass and heat up the soil thereby warming up plants
inside it
B. The emitted longer wavelength radiation (e.g., infrared) is partly reflected and partly absorbed
by the glass of the green house
C. ‘Green house effect’ in earth’s atmosphere is due to increasing CO2 level in atmosphere, where
CO2 acts like the glass of ‘green house’ thereby warming up the earth’s surface
D. ‘Green house’ is colder than the outside atmosphere
Pick out the wrong statement pertaining to ‘green house’ for the plants ? Read More »
Chemical Environmental Engineering