Q. The density of population over 40 hectares is 250/hectare. If water supply demand per day is 200 litres and sewage discharge is 80% of water supply, the sewage flow in sewers of separate system, is

View solution

Q. The rainfall at any place may be determined by

View solution

Q. In trickling filter, B.O.D. is reduced to

View solution

Q. Which one of the following gases is most significant as air pollutant

View solution

Q. Which one of the following statements regarding septic tanks is wrong :

View solution

Q. In circular sewers if depth of flow is 0.2 times the full depth, the nominal gradient,

View solution

Q. If the diameter of a sewer is 150 mm, the gradient required for generating self cleansing velocity, is

View solution

Q. The average temperature of sewage in India, is

View solution

Q. The most widely used pump for lifting sewage is

View solution

Q. The sewer which resists sulphide corrosion, is

View solution

Q. Ventilating shafts are provided to a sewer line at every

View solution

Q. Which one of the following part of human body withstands minimum radiation

View solution

Q. The water carried sewerage system removes

View solution

Q. Stoneware sewers are available in size

View solution

Q. The sludge does not contain waste water from

View solution

Q. Sewer pipes are designed for maximum discharge with 25% to 33% vacant cross-sectional area for

View solution

Q. 5 days-biochemical oxygen demand (BOD₅) is taken at a temperature of

View solution

Q. Water content of sewage is about

View solution

Q. Imhoff cone is used to measure

View solution

Q. For a grit chamber, if the recommended velocity of flow is 0.2 m/sec and detention period is 2 minutes, the length of the tank, is

View solution