Environmental Engineering The dissolved oxygen level in natural unpolluted waters at normal temperature is found to be of the order of 1000 mg/liter 10 mg/liter 1 mg/liter 100 mg/liter 1000 mg/liter 10 mg/liter 1 mg/liter 100 mg/liter ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering Which of the following compounds is widely used for algae control? Calcium chloride Sodium sulphate Sodium chloride Copper sulphate Calcium chloride Sodium sulphate Sodium chloride Copper sulphate ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering Air binding phenomena in rapid sand filters occur due to Low temperature Higher turbidity in the effluent Excessive negative head Mud ball formation Low temperature Higher turbidity in the effluent Excessive negative head Mud ball formation ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering Alkalinity in water is expressed as milligrams per litre in terms of equivalent Sodium carbonate Calcium carbonate Calcium hydroxide Magnesium carbonate Sodium carbonate Calcium carbonate Calcium hydroxide Magnesium carbonate ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The pathogens can be killed by Nitrification Oxidation Chlorination None of these Nitrification Oxidation Chlorination None of these ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The treatment of water with bleaching powder is known as Hypo-chlorination De-chlorination Pre-chlorination Super chlorination Hypo-chlorination De-chlorination Pre-chlorination Super chlorination ANSWER DOWNLOAD EXAMIANS APP
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