Environmental Engineering Residual chlorine in water is determined by Both (A) and (B) Orthotolidine method Starch iodide method None of these Both (A) and (B) Orthotolidine method Starch iodide method None of these 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 1000 mg/liter 100 mg/liter 10 mg/liter 1 mg/liter 1000 mg/liter 100 mg/liter 10 mg/liter 1 mg/liter ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering Air binding phenomena in rapid sand filters occur due to Mud ball formation Excessive negative head Higher turbidity in the effluent Low temperature Mud ball formation Excessive negative head Higher turbidity in the effluent Low temperature ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The chemical most commonly used to increase speed of sedimentation of sewage is Sulphuric acid Copper sulphate Sodium permanganate Lime Sulphuric acid Copper sulphate Sodium permanganate Lime ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering Activated carbon is used for Disinfection Removing hardness Removing corrosiveness Removing odours Disinfection Removing hardness Removing corrosiveness Removing odours ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The percentage of filtered water, which is used for backwashing in rapid sand filters, is about 5 to 7 0.2 to 0.4 2 to 4 0.4 to 1.0 5 to 7 0.2 to 0.4 2 to 4 0.4 to 1.0 ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS