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Environmental Engineering in CE

Environmental Engineering in CE
Brown spots in fabrics will be caused by washing with water containing large amount of .

Zinc
Iodine
Iron
Bromine

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Environmental Engineering in CE
The type of bacteria which is active in trickling filter during biological treatment of sewage is the __________ bacteria.

Anaerobic
Aerobic
Parasitic
Saphrophytic

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Environmental Engineering in CE
Presence of non-biodegradable substances, like alkyl benzene sulphonate (ABS) from the detergents in polluted water stream causes

Persistent foam
Fire hazards
Explosion hazards
Depletion of dissolved oxygen

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Environmental Engineering in CE
Inhalation of silica dust by human being during hand drilling in mica mining, lead & zinc mining, silica refractory manufacture and in foundaries causes

Tuberculosis
Asphyxiation (suffocation)
All of these
Shortness of breath

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Environmental Engineering in CE
Presence of iron and manganese in water causes

Discoloration of bathroom fixtures
Temporary hardness
None of these
Reduction in its dissolved oxygen content

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Environmental Engineering in CE
Removal of __________ is accomplished by aeration of water.

Dissolved solids
Suspended solids
Dissolved gases
None of these

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MORE MCQ ON Environmental Engineering in CE

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