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Environmental Engineering

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

Sub-main sewer
Intercepting sewer
Lateral sewer
House sewer

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Environmental Engineering
The suitable method for disinfection of swimming pool water is

By using potassium permanganate
Ultra violet rays treatment
Chlorination
Lime treatment

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Environmental Engineering
The process of lagooning is primarily a means of

Disposing of sludge
Reducing the excessive flow in sewers
Increasing the capacity of storage reservoirs
Increasing flow of sewage through imhoff tanks

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Environmental Engineering
The main disadvantage of cement concrete sewers is

Less strength
Difficulty in construction
Difficulty in transportation due to heavy weight
Less life

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Environmental Engineering
If the average daily consumption of a city is 100,000 m³, the maximum daily consumption on peak hourly demand will be

270000 m³
100000 m³
150000 m³
180000 m³

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Environmental Engineering
The relative stability of a sewage sample, whose dissolved oxygen is same as the total oxygen required to satisfy BOD, is

100
1
Zero
Infinite

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