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Environmental Engineering

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

10 to 15 days
3 months
48 hours
24 hours

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

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

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Environmental Engineering
Disinfection of water results in

Removal of hardness
Complete sterilisation
Removal of turbidity
Killing of disease bacteria

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Environmental Engineering
The maximum discharge of a tube well is about

5 liters/sec
1000 liters/sec
500 liters/sec
50 liters/sec

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Environmental Engineering
Standard BOD is measured at

30°C - 5 day
20°C - 5 day
25°C - 3 day
20°C - 1 day

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Environmental Engineering
The working conditions in imhoff tanks are

Aerobic only
Anaerobic only
Aerobic in lower compartment and anaerobic in upper compartment
anaerobic in lower compartment and aerobic in upper compartment

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MORE MCQ ON Environmental Engineering

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