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Environmental Engineering in CE

Environmental Engineering in CE
Which of the following is the most lethal water pollutant?

Alkalis
Chlorine
Suspended solids
Phenol and cynide

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Environmental Engineering in CE
Corrosion in boilers can be prevented by

All of these
Deaeration of feed water
Enhancing pH of feed water by adding alkali
Feeding sodium sulphite or hydrazine phosphate to the boilers, which combines with oxygen and prevents corrosion

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Environmental Engineering in CE
Death may occur, when SO₂ concentration in atmospheric air exceeds __________ ppm.

200
400
100
20

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Environmental Engineering in CE
Pick out the wrong statement pertaining to 'green house' for the plants.

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Environmental Engineering in CE
Moist atmospheric air at high temperature (e.g., in summer) having high concentration of sulphur dioxide causes

Corrosion, tarnishing & soiling of metals
Reduced strength of textiles
Fading of dyes on textiles
All of these

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Environmental Engineering in CE
Presence of soluble organics in polluted water causes

Explosion hazards
Depletion of oxygen
Fire hazards
Undesirable plants growth

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MORE MCQ ON Environmental Engineering in CE

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