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Environmental Engineering in CE

Environmental Engineering in CE
Presence of __________ in water stream are deleterious to aquatic life.

All of these
Suspended solids
Soluble and toxic organics
Heavy metals and cynides

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Environmental Engineering in CE
Which of the following is a manmade source of air pollution?

All of these
Automobile exhaust
Bacterial action in soil and swamp areas
Forest fire

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Environmental Engineering in CE
Water filtration rate in a slow sand filter ranges from __________ litres/m²/hr.

4000 to 5000
100 to 200
1500 to 2500
10 to 20

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Environmental Engineering in CE
Photochemical smog is formed from automobile exhaust

Is harmful for crops and trees also besides causing eye irritation & asthma
Appears only on sunny days
By reaction of hydrocarbon & nitric oxide in presence of sunlight
All of these

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Environmental Engineering in CE
Inhalation of silica dust by human being causes

Both B & C
Shortness of breath
Tuberculosis
Asphyxiation

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Environmental Engineering in CE
Presence of a certain minimum quantity of flourine is desirable in potable water to prevent

Water-borne disease
Dental cavities
Scale formation
Corrosion

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