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ENVIRONMENTAL ENGINEERING IN CE

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

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

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Environmental Engineering in CE
TLV of mercury in potable (drinking) water is about __________ ppm.

5
1
0.1
0.001

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Environmental Engineering in CE
TLV of lead for public sewer/waste water is about __________ ppm.

1
150
25
650

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Environmental Engineering in CE
Radioactive substances present in the polluted water stream can be removed by

Adsorption in ion exchange materials
None of these
Biological oxygen treatment
Coagulation and filtration

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Environmental Engineering in CE
The destruction of water-borne pathogens is termed as disinfection of water. Which of the following is a water disinfectant?

Alkyl benzene sulphonate (ABS)
Benzene hexachloride
Alkalis
Chlorine

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