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Environmental Engineering in CE

Environmental Engineering in CE
Maximum permissible turbidity in potable water is __________ ppm.

1000
1
250
10

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Environmental Engineering in CE
World environment day is observed every year on the 5th of

July
December
September
June

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

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Environmental Engineering in CE
Exposure to small amount of __________ results in high blood pressure & heart disease in human beings.

Cadmium
Asbestos
Mercury
Hydrogen sulphide

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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
Neither A nor B
Shear forces

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Environmental Engineering in CE
In sewage treatment, the detention period allowed for oxidation ponds ranges from __________ weeks.

15 to 20
9 to 10
1 to 2
4 to 5

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