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Environmental Engineering in CE

Environmental Engineering in CE
Which of the following is the most detrimental for water used in high pressure boiler?

Silica
Phenol
Turbidity
Dissolved oxygen

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Environmental Engineering in CE
Iron & manganese present as pollutant in water can not be removed by

Lime soda process or manganese zeolite process
Chlorination
Ion exchange process
Oxidation followed by settling & filtration

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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

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

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Environmental Engineering in CE
__________ content of the phosphate rock is the pollutant of primary interest in a phos-phatic fertiliser plant.

Calcium
Fluorine
Sulphur
Phosphorous

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Environmental Engineering in CE
'Particulate' air pollutants are finely divided solids and liquids. Which of the following is not a 'particulate'?

None of these
Dust & mists
Photochemical smog & soot
Smoke & fumes

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Environmental Engineering in CE
TLV of NO₂ & NO exposure for the human being is 5 & 25 ppm respectively. Prolonged exposure of human being to NO₂ causes

Cancer
Bronchitis
Bone disease
Skin disorder

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