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Waste Water Engineering

Waste Water Engineering
In SI units the power of sound is represented in

Newtons
Kgs
Joules
Watts

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Waste Water Engineering
To test chemical oxygen demand (C.O.D.) of sewage, organic matter is oxidised by potassium dichromate in the presence of

Sulphuric acid
Nitric acid
Hydrochloric acid
Citric acid

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Waste Water Engineering
Oxidation process results in the formation of

Carbon dioxide
Nitrates
All of these
Sulphates

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Waste Water Engineering
The sewage treatment units in which anaerobic decomposition of organic matter is used, are called

Trickling filters
None of these
Sludge sedimentation tanks
Imhoff tanks

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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

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

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Waste Water Engineering
The sewerage system consists of

Lateral sewer
Branch sewer
All of these
House sewer

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