If is the diameter of upper circular portion, the area of cross-section of a standard egg shaped sewer, is____________________?
A. D²
B. D²
C. D²
D. D²
Waste Water Engineering
The small sewers are cleaned by____________________?
The small sewers are cleaned by____________________?
A. Flushing
B. Cane rodding
C. Wooden pills
D. None of these
In sewers the gas generally found, is_________________?
In sewers the gas generally found, is_________________?
A. Hydrogen sulphide (H2S)
B. Carbon dioxide (CO2)
C. Methane (CH4)
D. All the above
If the depth of partial flow in a sewer of diameter 2 m, is 50 cm, its wetted perimeter is____________________ ?
If the depth of partial flow in a sewer of diameter 2 m, is 50 cm, its wetted perimeter is____________________ ?
A. 1/3
B. 0/2
C. 0/3
D. 2 /3
Rate of flow of sewage is generally assumed__________________?
Rate of flow of sewage is generally assumed__________________?
A. More than the rate of water supply
B. Equal to the rate of water supply
C. Less than the rate of water supply
D. At 150 litres per capita
In R.C. sewer pipes, the percentage longitudinal reinforcement to the cross-sectional area of concrete is kept________________?
In R.C. sewer pipes, the percentage longitudinal reinforcement to the cross-sectional area of concrete is kept________________?
A. 10.0
B. 5.0
C. 2.0
D. 0.25
House connections to the laterals is generally made by___________________?
House connections to the laterals is generally made by___________________?
A. R.C.C.
B. P.C.C.
C. Cast iron
D. Glazed stonewares
In primary sedimentation, the 0.2 mm inorganic solids get separated if specific gravity is_________________?
In primary sedimentation, the 0.2 mm inorganic solids get separated if specific gravity is_________________?
A. 2.25
B. 2.50
C. 2.55
D. 2.65
In olden days the type of section adopted in trunk and out fall sewers was__________________?
In olden days the type of section adopted in trunk and out fall sewers was__________________?
A. Parabolic shaped
B. Horse shoe shaped
C. Egg shaped
D. Circular shaped
Which one of the following resists hydrogen sulphide corrosion ?
Which one of the following resists hydrogen sulphide corrosion ?
A. R.C.C.
B. Glazed stone wares
C. Asbestos cement
D. Glazed ware