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Environmental Engineering in CE

Environmental Engineering in CE
Removal of __________ results from the disinfection of water.

Odour
Bacteria
Hardness
Turbidity

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Environmental Engineering in CE
TLV of aldrin in public water supply system is about __________ μg/litre.

1097
17
0.5
357

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Environmental Engineering in CE
Presence of iron and manganese in water causes

None of these
Discoloration of bathroom fixtures
Reduction in its dissolved oxygen content
Temporary hardness

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Environmental Engineering in CE
Which of the following is a green house gas other than CO₂ ?

Chlorofluro carbons (CFC)
Nitrous oxide
All of these
Methane

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Environmental Engineering in CE
Which of the following processes is involved in the biochemical treatment of sewage effluents?

Dehydration
Oxidation
Reduction
Fermentation

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Environmental Engineering in CE
White smoke coming out of the chimney of a furnace indicates the use of

Gaseous fuel in the furnace
Low excess air
Liquid fuel in the furnace
Very high excess air

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