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The most widely used pump for lifting sewage is
(1) Centrifugal pump: (i) Centrifugal pumps are most commonly used for pumping sewage, because these pumps can be easily installed in pits and sumps, and can easily transport the suspended matter present in the sewage.
(1) Centrifugal pump:
See less(i) Centrifugal pumps are most commonly used for pumping sewage, because these pumps can be easily installed in pits and sumps, and can easily transport the suspended matter present in the sewage.
Afive day B.O.D. at 15°C of the sewage of a town is 100 kg/day. If the 5 day B.O.D. per head at 15°C for standard sewage is 0.1 kg/day, the population equivalent is
The five-day BOD5 per capita of standard sewage is 0.1 kg/day. In this case, the five-day BOD5 of the sewage of the town is 100 kg/day. Therefore, the population equivalent is 1000.
The five-day BOD5 per capita of standard sewage is 0.1 kg/day. In this case, the five-day BOD5 of the sewage of the town is 100 kg/day. Therefore, the population equivalent is 1000.
See lessThe 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
Therefore, the sewage discharge is 0.8*2000000 = 1600000 litres per day. The sewage flow in sewers of separate system is 1600000/86400 = 0.05552 cumec. Here is a brief explanation of each option: Option A: 0.05552 cumec.
Therefore, the sewage discharge is 0.8*2000000 = 1600000 litres per day. The sewage flow in sewers of separate system is 1600000/86400 = 0.05552 cumec. Here is a brief explanation of each option: Option A: 0.05552 cumec.
See lessThe design period in years for pumping plants, is
4.6 Component Design period (years) from base year Pumping stations 30 Pumping machinery 15 Sewage treatment plants 15 Effluent Disposal 30
4.6
See lessComponent Design period (years) from base year
Pumping stations 30
Pumping machinery 15
Sewage treatment plants 15
Effluent Disposal 30
The Chezy's constant C in the formula V = C rs depends upon
Where f = friction factor, L = length of pipe, v = flow velocity, and d = diameter of pipe. Chezy's constant is inversely proportional to the square root of the friction factor.
Where f = friction factor, L = length of pipe, v = flow velocity, and d = diameter of pipe. Chezy’s constant is inversely proportional to the square root of the friction factor.
See lessThe maximum spacing of manholes specified by Indian standard in sewers upto 0.3 m diameter is
As per IS 1742:1960: The recommended spacing of manholes on straight reaches of sewer lines for the diameter of sewer up to 0.3 m is 45 m.
As per IS 1742:1960: The recommended spacing of manholes on straight reaches of sewer lines for the diameter of sewer up to 0.3 m is 45 m.
See lessThe maximum spacing of manholes specified by Indian standard in sewers upto 0.3 m diameter is
As per IS 1742:1960: The recommended spacing of manholes on straight reaches of sewer lines for the diameter of sewer up to 0.3 m is 45 m. As per IS 1742:1960: The recommended spacing of manholes on straight reaches of sewer lines for the diameter of sewer up to 0.3 m is 45 m.
As per IS 1742:1960: The recommended spacing of manholes on straight reaches of sewer lines for the diameter of sewer up to 0.3 m is 45 m.
See lessAs per IS 1742:1960: The recommended spacing of manholes on straight reaches of sewer lines for the diameter of sewer up to 0.3 m is 45 m.
a gap of 7.5 cm between the bottom of the covering slab and the top level of scum is provided
The depth of tank is kept equal to its width
The depth of tank is kept equal to its width
See lessWhich one of the following gases is most significant as air pollutant
The correct answer is Sulphur dioxide (SO2). Please Note: We may get confused between the Ozone and Sulfur dioxide (SO2). Sulfur dioxide (SO2) is an atmospheric pollutant. Whereas the Ozone is not the atmospheric pullutant but it's formed by chemical interactions.
The correct answer is Sulphur dioxide (SO2). Please Note: We may get confused between the Ozone and Sulfur dioxide (SO2). Sulfur dioxide (SO2) is an atmospheric pollutant. Whereas the Ozone is not the atmospheric pullutant but it’s formed by chemical interactions.
See lessIn trickling filter, B.O.D. is reduced to
The BOD is reduced to 70 to 90 % of the original value.
The BOD is reduced to 70 to 90 % of the original value.
See less