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Waste Water Engineering

Waste Water Engineering
In primary sedimentation, the 0.2 mm inorganic solids get separated if specific gravity is

2.55
2.65
2.25
2.5

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Waste Water Engineering
The sewer which received discharge from two or more main sewers, is known as

An intercepting sewer
A main sewer
An outfall sewer
A trunk sewer

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Waste Water Engineering
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

20 m
30 m
16 m
24 m

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Waste Water Engineering
The ratio of the diameter of a circular section and the side of a square section hydraulically equivalent, is

1.095
1.075
1.065
1.085

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Waste Water Engineering
A sewer pipe contains 1 mm sand particles of specific gravity 2.65 and 5 mm organic particles of specific gravity 1.2, the minimum velocity required for removing the sewerage, is

0.30 m/sec
0.35 m/sec
0.45 m/sec
0.40 m/sec

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

Cholera
Typhoid
All listed here
Dysentery

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