Waste Water Engineering If the depletion of oxygen is found to be 2.5 mg/litre after incubating 2.5 ml of sewage diluted to 250 ml for 5 days at 20°C, B.O.D. of the sewage is 150 mg/l 50 mg/l 100 mg/l 250 mg/l 150 mg/l 50 mg/l 100 mg/l 250 mg/l ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering In areas where rainy season is limited to a few months, the type of sewerage system recommended is None of these Partially separate system Separate system Combined system None of these Partially separate system Separate system Combined system ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering The detention time (t) of a settling tank, may be defined as the time required for A particle to travel along its length A particle to travel from top surface to bottom sludge zone The flow of sewage to fill the tank None of these A particle to travel along its length A particle to travel from top surface to bottom sludge zone The flow of sewage to fill the tank None of these ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering The screens are fixed None of these Parallel to the direction of flow At an angle 30° to 60° to the direction of flow Perpendicular to the direction of flow None of these Parallel to the direction of flow At an angle 30° to 60° to the direction of flow Perpendicular to the direction of flow ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering A nuisance is experienced in diluting water if dilution factor is less than 40 100 20 60 40 100 20 60 ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering Removal of oil and grease from sewage, is known Skimming Screening Filtration None of these Skimming Screening Filtration None of these ANSWER DOWNLOAD EXAMIANS APP
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