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Waste Water Engineering

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

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Waste Water Engineering
The dimensions of a rectangular settling tank are: length 24 m, width 6 m and depth 3 m. If 2 hour detention period for tanks is recommended, the rate of flow of sewage per hour, is

204 cu.m
212 cu.m
216 cu.m
208 cu.m

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Waste Water Engineering
The sewage is pumped up

From basements
From low lying areas
All listed here
From flat areas

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Waste Water Engineering
With self cleansing velocity in sewers

Both silting and scouring occur at bottom
Scouring occurs at bottom
Neither silting nor scouring occurs at bottom
Silting occurs at bottom

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Waste Water Engineering
Fresh sewage is generally

Highly decomposed
A source of objectionable odour
Acidic
Alkaline

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Waste Water Engineering
For evaporation and measurement of settable solids, the apparatus used, is

A breaker
A test tube
An Imhoff cone
A jar

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