Environmental Engineering The maximum permissible limit for fluoride in drinking water is 5 mg/liter 0.1 mg/liter 1.5 mg/liter 10 mg/liter 5 mg/liter 0.1 mg/liter 1.5 mg/liter 10 mg/liter ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering Cleaning is done by (i) Scraping and removal in filters slow sand (ii) Back washing in slow sand filters (iii) Scraping and removal in filters rapid sand (iv) Back washing in rapid sand filters The correct answer is (ii) and (iv) (i) and (iv) (i) and (ii) (ii) and (iii) (ii) and (iv) (i) and (iv) (i) and (ii) (ii) and (iii) ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The dissolved oxygen level in natural unpolluted waters at normal temperature is found to be of the order of 100 mg/liter 1 mg/liter 1000 mg/liter 10 mg/liter 100 mg/liter 1 mg/liter 1000 mg/liter 10 mg/liter ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The specific gravity of sewage is Slightly less than 1 Much greater than 1 Equal to 1 Slightly greater than 1 Slightly less than 1 Much greater than 1 Equal to 1 Slightly greater than 1 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The depression of water table in a well due to pumping will be maximum(Where ‘R’ is the radius of influence) At a distance R from the well None of these Close to the well At a distance R/2 from the well At a distance R from the well None of these Close to the well At a distance R/2 from the well ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The process of lagooning is primarily a means of Increasing flow of sewage through imhoff tanks Increasing the capacity of storage reservoirs Reducing the excessive flow in sewers Disposing of sludge Increasing flow of sewage through imhoff tanks Increasing the capacity of storage reservoirs Reducing the excessive flow in sewers Disposing of sludge ANSWER DOWNLOAD EXAMIANS APP
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