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Environmental Engineering

Environmental Engineering
The characteristics of fresh and septic sewage respectively are

Both acidic
Acidic and alkaline
Alkaline and acidic
Both alkaline

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Environmental Engineering
Disinfection efficiency is

Increased at higher pH value of water
Unaffected by pH value of water
Highest at pH value equal to 7
Reduced at higher pH value of water

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Environmental Engineering
In chlorination, with the rise in temperature of water, death rate of bacteria

Decreases
Increases
None of these
Remains unaffected

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Environmental Engineering
The main disadvantage of cement concrete sewers is

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

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Environmental Engineering
The design discharge for the separate sewer system shall be taken as

2 × DWF
Equal to dry weather flow (DWF)
3 × DWF
6 × DWF

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Environmental Engineering
Sewerage system is designed for

Minimum flow only
Average flow only
Maximum flow only
Maximum and minimum flow

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MORE MCQ ON Environmental Engineering

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