Environmental Engineering On standard silica scale, the turbidity in drinking water should be limited to 50 ppm 10 ppm 20 ppm 30 ppm 50 ppm 10 ppm 20 ppm 30 ppm 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 10 mg/liter 1000 mg/liter 1 mg/liter 100 mg/liter 10 mg/liter 1000 mg/liter 1 mg/liter ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering If the sewage contains grease and fatty oils, these are removed in Sedimentation tanks Detritus tanks Grit chambers Skimming tanks Sedimentation tanks Detritus tanks Grit chambers Skimming tanks ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The detention period and overflow rate respectively for plain sedimentation as compared to sedimentation with coagulation are generally More and more More and less Less and more Less and less More and more More and less Less and more Less and less ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The chemical most commonly used to increase speed of sedimentation of sewage is Sulphuric acid Sodium permanganate Lime Copper sulphate Sulphuric acid Sodium permanganate Lime Copper sulphate ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering Generally the detention period for grit chambers is kept as 24 hours 12 hours 1 minute 5 minutes 24 hours 12 hours 1 minute 5 minutes ANSWER DOWNLOAD EXAMIANS APP
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