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Environmental Engineering

Environmental Engineering
The chemical most commonly used to increase speed of sedimentation of sewage is

Copper sulphate
Sodium permanganate
Sulphuric acid
Lime

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Environmental Engineering
The most commonly used sewer under culverts is

Circular cast iron sewer
Circular brick sewer
Horseshoe type sewer
Semi-elliptical sewer

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Environmental Engineering
Orthotolidine test is used for determination of

Dose of coagulant
Biochemical oxygen demand
Residual chlorine
Dissolved oxygen

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Environmental Engineering
Composting and lagooning are the methods of

Sludge digestion
Sludge disposal
Sedimentation
Filtration

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Environmental Engineering
The settling velocity of a particle in a sedimentation tank increases if

None of these
The surface area of tank is increased
Particle size is decreased
The depth of tank is decreased

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Environmental Engineering
The treatment of water with bleaching powder is known as

De-chlorination
Super chlorination
Pre-chlorination
Hypo-chlorination

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MORE MCQ ON Environmental Engineering

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