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Environmental Engineering

Environmental Engineering
A pipe which is installed in the house drainage to preserve the water seal of traps is called

Vent pipe
Waste pipe
Anti-siphonage pipe
Soil pipe

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Environmental Engineering
Which of the following retards the self purification of stream?

Sunlight
None of these
Higher temperature
Satisfying oxygen demand

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Environmental Engineering
The rate of Alteration of pressure filters is

In between the filtration rate of slow sand filters and rapid sand filters
Less than that of slow sand filters
Greater than that of rapid sand filters
Equal to that of slow sand filters

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Environmental Engineering
The rate of BOD exerted at any time is

Inversely proportional to BOD remaining
Directly proportional to BOD remaining
Directly proportional to BOD satisfied
Inversely proportional to BOD satisfied

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Environmental Engineering
Most suitable section of sewer in separate sewage system is

Circular section
Standard form of egg shaped sewer
Modified egg shaped section
Rectangular section

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Environmental Engineering
The minimum and maximum diameters of sewers shall preferably be

15 cm and 100 cm
15 cm and 300 cm
60 cm and 300 cm
30 cm and 450 cm

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