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Environmental Engineering in CE

Environmental Engineering in CE
Reingleman chart No. 2 corresponds to __________ percent black smoke.

10
40
80
20

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

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

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Environmental Engineering in CE
Oilish impurities present the effluent discharged from the electroplating industry is normally not removed by

Centrifugation
Chemical coagulation
Floatation & skimming
Ultrafiltration

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Environmental Engineering in CE
TLV of ammonia, nitrogen dioxide and phenol vapor in air is __________ ppm.

5
2000
100
1000

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Environmental Engineering in CE
Fresh sewage is __________ in nature.

Acidic
Neutral
Highly acidic
Alkaline

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Environmental Engineering in CE
Presence of __________ bacteria in water causes disease like typhoid.

Pathogenic
Anaerobic
Non-pathogenic
Aerobic

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