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Environmental Engineering

Environmental Engineering
Which of the following chemical compounds can be used for de-chlorination of water?

Carbon dioxide
Sulphur dioxide
Chloramines
Bleaching powder

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Environmental Engineering
The main disadvantage of cement concrete sewers is

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

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Environmental Engineering
Air binding phenomena in rapid sand filters occur due to

Low temperature
Excessive negative head
Mud ball formation
Higher turbidity in the effluent

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Environmental Engineering
The velocity of flow does not depend on

Roughness of sewer
Length of sewer
Grade of sewer
Hydraulic mean depth of sewer

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Environmental Engineering
The water carriage system of collection of waste product

Requires treatment before disposal
All of these
Is cheaper in initial cost than dry conservancy system
Creates hygienic problem

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Environmental Engineering
The maximum discharge of a tube well is about

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

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