Environmental Engineering in CE COD of raw municipal sewage may be in the range of about __________ mg/litre. 5-10 1500-2500 1-2 90-120 5-10 1500-2500 1-2 90-120 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE H₂S present in gaseous stream can be removed by adsorption on Active carbon Limestone powder Silica gel Bog iron Active carbon Limestone powder Silica gel Bog iron ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Presence of a certain minimum quantity of flourine is desirable in potable water to prevent Corrosion Scale formation Water-borne disease Dental cavities Corrosion Scale formation Water-borne disease Dental cavities ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Aerobic biological oxidation ponds used for the purification of polluted water All of these Is not very effective for nonbiodegradable substances (e.g. ABS) containing effluents Destroys/removes pathogen much more effectively if the sewage is chlorinated Destroys/removes pathogen from the sewage All of these Is not very effective for nonbiodegradable substances (e.g. ABS) containing effluents Destroys/removes pathogen much more effectively if the sewage is chlorinated Destroys/removes pathogen from the sewage ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE The disinfection efficiency of chlorine increases by(i) Decreasing the time of contact(ii) Decreasing the temperature of water(iii) Increasing the temperature of water Both (i) and (iii) Only (i) Only (iii) Both (i) and (ii) Both (i) and (iii) Only (i) Only (iii) Both (i) and (ii) ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Which of the following acts as a natural source of air pollution? Volcanic eruption Deforestation None of these Forest fire Volcanic eruption Deforestation None of these Forest fire ANSWER DOWNLOAD EXAMIANS APP
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