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Environmental Engineering

Environmental Engineering
The maximum permissible limit for fluoride in drinking water is

0.1 mg/liter
5 mg/liter
10 mg/liter
1.5 mg/liter

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

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

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Environmental Engineering
Standard EDTA (ethylene diamine tetra acetic acid) solution is used to determine the

Residual chlorine in water
Turbidity in water
Dissolved oxygen in water
Hardness in water

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

Lateral sewer
House sewer
Intercepting sewer
Sub-main sewer

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Environmental Engineering
Which of the following is not a water borne disease?

Typhoid
Malaria
Cholera
Dysentery

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Environmental Engineering
Percentage of bacterial load that can be removed from water by the process of plain sedimentation is about

59
50
100
75

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