Environmental Engineering in CE
If the coli form bacteria is present in a sample of water, then the coli-form test to be conducted is(i) Presumptive coli-form test(ii) Confirmed coli-form test(iii) Completed coli-form test

All (i), (ii) and (iii)
Only (i)
Both (i) and (iii)
Both (i) and (ii)

ANSWER DOWNLOAD EXAMIANS APP

Environmental Engineering in CE
Higher concentration of CO₂ in atmosphere

All of these
Allows visible solar radiation (ultraviolet) of short wave-length to pass through
Prevents solar heat being radiated out completely, resulting in
Reflects and absorbs the longer wavelength (infra-red) radiations

ANSWER DOWNLOAD EXAMIANS APP

Environmental Engineering in CE
Bacterial aerobic oxidation of polluted water in biological oxidation ponds is done to purify it. Presence of bacteria helps in

Oxidation of carbonaceous matter to CO₂
Nitrification or oxidation of ammonia derived from breakdown of nitrogeneous organic matter to the nitrite and eventually to the nitrate
Coagulation and flocculation of colloids
All of these

ANSWER DOWNLOAD EXAMIANS APP