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Environmental Engineering in CE

Environmental Engineering in CE
Noise pollution level in a chemical plant is expressed in

Hertz
Decibel
Roentgen
None of these

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Environmental Engineering in CE
Hazardous/polluting chemical industries should have an 'exclusion zone' with a green belt and general public access prohibited around it, covering a radius of ____ metres.

100
1000
400
4000

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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

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

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Environmental Engineering in CE
Noise level audible to audience sitting in the 5th row from the stage during a large orchestra show corresponds to about __________ decibels.

160
185
105
135

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Environmental Engineering in CE
Cleaning is done by(i) Scraping and removal in filters slow sand(ii) Back washing in slow sand filters(iii) Scraping and removal in filters rapid sand(iv) Back washing in rapid sand filtersThe correct answer is

(ii) and (iv)
(i) and (ii)
(ii) and (iii)
(i) and (iv)

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Environmental Engineering in CE
Iron & manganese present in the polluted water is removed by

Chlorination only
Oxidation followed by settling & filtration
Simple filtration
Chemical coagulation

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