Environmental Engineering The most common cause of acidity in water is Nitrogen Carbon dioxide Hydrogen Oxygen Nitrogen Carbon dioxide Hydrogen Oxygen 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 If the sewage contains grease and fatty oils, these are removed in Detritus tanks Sedimentation tanks Skimming tanks Grit chambers Detritus tanks Sedimentation tanks Skimming tanks Grit chambers ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering In a BOD test, 1.0 ml of raw sewage was diluted to 100 ml and the dissolved oxygen concentration of diluted sample at the beginning was 6 ppm and it was 4 ppm at the end of 5 day incubation at 20°C. The BOD of raw sewage will be 100 ppm 300 ppm 200 ppm 400 ppm 100 ppm 300 ppm 200 ppm 400 ppm ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering Which of the following sewers is preferred for combined system of sewage? Circular sewer Rectangular sewer Egg shaped sewer None of these Circular sewer Rectangular sewer Egg shaped sewer None of these ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering Generally the detention period for grit chambers is kept as 12 hours 24 hours 5 minutes 1 minute 12 hours 24 hours 5 minutes 1 minute ANSWER DOWNLOAD EXAMIANS APP
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