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Waste Water Engineering

Waste Water Engineering
Depletion of ozone layer in the outer atmosphere may cause

Skin cancer
Heart disorder
Bronchitis
Lung cancer

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Waste Water Engineering
The value of Chezy’s constant C = 157.6/(1.81 + K/ ) is used in

Chezy’s formula
Bazin’s formula
Kutter’s formula
Manning’s formula

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Waste Water Engineering
The settling velocity of the particles larger than 0.06 mm in a settling tank of depth 2.4 is 0.33 m per sec. The detention period recommended for the tank, is

1 hour and 30 minutes
2 hours
1 hour
30 minutes

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Waste Water Engineering
The settlement velocity of a solid (diameter 0.5 mm, specific gravity 1.75) in water having temperature 10°C, is

413.5 cm/sec
500 cm/sec
313.5 cm/sec
213.5 cm/sec

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Waste Water Engineering
You are asked to design sewer pipes of diameters 0.4 m to 0.9 m at maximum flow, you will assume the sewer flow running at

Three fourth full
Full depth
Two third full
Half full

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Waste Water Engineering
A well oxidized sewage contains nitrogen mainly as

Nitrates
Nitrites
None of these
Free ammonia

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