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Environmental Engineering in CE

Environmental Engineering in CE
Inhalation of silica dust causes a disease called

None of these
Silicosis
Bronchitis
Pneumoconiosis

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Environmental Engineering in CE
Which is the most efficient dust removal equipment for removal of sub-micronic dust particles from blast furnace gas?

Packed scrubber
Hydrocyclone
Electrostatic precipitator
Gravity settling chamber

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Environmental Engineering in CE
During sewage treatment, the sewage is subjected to __________ treatment in Imhoff tank.

Sedimentation
Filtration
Both B and C
Digestion

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Environmental Engineering in CE
In water treatment plant, zeolite process is used to remove the __________ of water.

Iron & zinc
Alkalinity
Hardness
Acidity

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Environmental Engineering in CE
Presence of carbon monoxide in atmosphere produced by decomposition of chlorophyl and haemoglobin breakdown of some animals, beyond TLV (>50 ppm)

Acts as a green house gas thereby raising earth's temperature
Causes asphyxia
Inhances the green house effect
Causes increase in sea level

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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

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

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