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Environmental Engineering in CE

Environmental Engineering in CE
Sound produced by an automobile horn heard at a distance of 1.5 metres corresponds to about __________ decibels.

90
120
150
180

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Environmental Engineering in CE
Turbidity of water is an indication of the presence of

Suspended inorganic matter
Dissolved solids
Floating solids
Dissolved gases

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Environmental Engineering in CE
If carbon monoxide content in atmospheric air exceeds __________ ppm, death is bound to occur.

500
1000
3000 (i.e. 0.3%)
50

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Environmental Engineering in CE
Which of the following pollutants, if present in atmosphere is detectable by its odour?

CO₂
CO
NO₂
SO₂

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Environmental Engineering in CE
Irradiation of water by ultraviolet light of suitable wavelength is commonly used for disinfection of water in

Food industry
Iron & steel plant
Petroleum refinery
Municipal sewage treatment

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Environmental Engineering in CE
Aerodynamic noise resulting from turbulent gas flow is the most prevalent source of valve noise in fluid ilow control. It is caused due to

Reynold stresses
Both A & B
Shear forces
Neither A nor B

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