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Environmental Engineering

Environmental Engineering
The characteristics of fresh and septic sewage respectively are

Acidic and alkaline
Both alkaline
Both acidic
Alkaline and acidic

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Environmental Engineering
The minimum dissolved oxygen which should always be present in water in order to save the aquatic life is

4 ppm
1 ppm
10 ppm
40 ppm

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Environmental Engineering
In water treatment, rapid gravity filters are adopted to remove

Dissolved solids and dissolved gases
Dissolved organic substances
Floating solids and dissolved inorganic solids
Bacteria and colloidal solids

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Environmental Engineering
The suitable layout of a distribution system for irregularly growing town is

Grid iron system
Ring system
Radial system
Dead end system

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Environmental Engineering
The detention period for oxidation ponds is usually kept as

48 hours
3 months
24 hours
10 to 15 days

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Environmental Engineering
The suitable system of sanitation for area of distributed rainfall throughout the year with less intensity is

Separate system
Partially combined system
Combined system
Partially separate system

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