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Environmental Engineering in CE

Environmental Engineering in CE
Fluorosis (a bone disease) is caused by the presence of high concentration of __________ in atmospheric air.

Hydrogen sulphides
Hydrogen flouride
Hydrocarbons
Nitrogen dioxide

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Environmental Engineering in CE
Maximum allowable noise exposure limits for a man working for 8 hours a day in a noisy chemical plant is about __________ decibels.

60
20
120
90

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Environmental Engineering in CE
Algae growth in water is controlled by

Bleaching
Chlorination
Deoxidation
Aeration

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Environmental Engineering in CE
Aerosols present in atmospheric air may be

Negatively charged
Neutral
Positively charged
Combination of all A, B & C

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Environmental Engineering in CE
Noise level during normal conversation among men is about __________ decibles.

115
45
10
90

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Environmental Engineering in CE
Oilish impurities present the effluent discharged from the electroplating industry is normally not removed by

Centrifugation
Floatation & skimming
Ultrafiltration
Chemical coagulation

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MORE MCQ ON Environmental Engineering in CE

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