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Environmental Engineering

Environmental Engineering
A sewer that receives the discharge of a number of house sewers is called

House sewer
Sub-main sewer
Lateral sewer
Intercepting sewer

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Environmental Engineering
Which of the following sewers is preferred for combined system of sewage?

Circular sewer
Egg shaped sewer
None of these
Rectangular sewer

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Environmental Engineering
If the time of concentration is 9 minutes, then the intensity of rainfall according to British Ministry of Health formula will be

20 mm/hr
4 mm/hr
40 mm/hr
10 mm/hr

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Environmental Engineering
The treatment of water with bleaching powder is known as

Super chlorination
Hypo-chlorination
De-chlorination
Pre-chlorination

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Environmental Engineering
Sewerage system is usually designed for

27 years
25 years
26 years
28 years

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Environmental Engineering
The slope of sewer shall be

Steeper than 1 in 20
Zero
Given in the direction opposite to natural slope of ground
Given in the direction of natural slope of ground

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