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Environmental Engineering in CE

Environmental Engineering in CE
Deaeration of high pressure boiler feed water is done to reduce

Caustic embrittlement
Its silica content
Foaming from boilers
Its dissolved oxygen content

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Environmental Engineering in CE
Which of the following is the most widely used disinfectant in water treatment?

Cation exchanger
Irradiation of water by ultraviolet light
Chlorine
Coagulation

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Environmental Engineering in CE
Global warming may result in

Cyclone
All of these
Decrease in food productivity
Flood

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Environmental Engineering in CE
Presence of nitrates in water in excess of 50 ppm causes

Asphyxiation
Mathenoglobenemia
Tooth decay
Gastroentetitis

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

Methane
All of these
Chlorofluro carbons (CFC)
Nitrous oxide

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Environmental Engineering in CE
In water treatment plant, zeolite process is used to remove the __________ of water.

Iron & zinc
Alkalinity
Acidity
Hardness

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