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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

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

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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

30 m
24 m
16 m
20 m

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

Newtons
Watts
Kgs
Joules

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Waste Water Engineering
15 cumecs, the depth d and width are related by For drains up to

d = 0.5 B
d = 0.2 B
B = 0.5 d
B = 0.2 d

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Waste Water Engineering
Hazen’s formula VS = 418 (GS – Gw)d [(3T + 70)/100] is used for the settlement velocity of the particles of diameter

Less than 0.01 mm
Less than 0.05 mm
Greater than 0.1 mm
Less than 0.1 mm

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Waste Water Engineering
The rational formula for peak drainage discharge, was evolved by

Lloyd David
Fruhling
Kuichling
All of these

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