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Environmental Engineering in CE

Environmental Engineering in CE
Nitrogen oxides (NOx) is not produced in the __________ industry.

Nitric acid making
Any of these
Detergent
Nitrogenous fertiliser

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Environmental Engineering in CE
Which of the following is the most severe air pollutant?

NOx
SO₂
CO
Hydrocarbons

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Environmental Engineering in CE
Maximum permissible limit of mercury in human blood is __________ micrograms/100 c.c.

7
19
82
1

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Environmental Engineering in CE
Turbidity of water is an indication of the presence of

Suspended inorganic matter
Floating solids
Dissolved gases
Dissolved solids

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Environmental Engineering in CE
Particles having diameter greater than 75 μm (micrometer = 10-6 mm) are called

Grit
Smoke
Dust
Powder

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Environmental Engineering in CE
Presence of non-biodegradable substances, like alkyl benzene sulphonate (ABS) from the detergents in polluted water stream causes

Persistent foam
Explosion hazards
Depletion of dissolved oxygen
Fire hazards

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