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Waste Water Engineering

Waste Water Engineering
In a sedimentation tank (length L, width B, depth D) the settling velocity of a particle for a discharge Q, is

Q/(B × L)
Q/L
Q/(B × D)
Q/(L × D)

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Waste Water Engineering
The sewerage system originates from

Main sewers
Branch sewers
House sewers
Lateral sewers

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Waste Water Engineering
If is the diameter of upper circular portion, the overall depth of a standard egg shaped section, is

1.25 D
1.15 D
1.5 D
1.75 D

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Waste Water Engineering
A rain sanitary sewer is constructed to carry

Storm sewage
Sanitary sewage
Surface water
Ground water

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Waste Water Engineering
Pathogens (or pathogenic bacterias) in water may cause

All listed here
Dysentery
Cholera
Typhoid

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Waste Water Engineering
If the diameter of a sewer is 150 mm, the gradient required for generating self cleansing velocity, is

1 in 100
1 in 120
None of these
1 in 60

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