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Environmental Engineering in CE

Environmental Engineering in CE
Polluted water having low BOD are most economically treated in

Oxidation ponds
Sludge digester
Sedimentation tanks
Clarifier

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Environmental Engineering in CE
The function of skimming tank in sewage treatment is to remove __________ substances.

Gritty & inorganic
Oil & fatty
Suspended solid
Dissolved solid

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Environmental Engineering in CE
Polyvinyl chloride containers are not suitable for storing

Woolen clothes
Foodstuffs
None of these
Metallic powder

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Environmental Engineering in CE
Carbonaceous particles having size less than 1 μm are called

Aerosols
Smoke
Aggregates
Grit

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

25
150
650
1

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Environmental Engineering in CE
Which of the following is not a source of ozone emission in the atmosphere?

High voltage electrical equipments
Xerox machines
Refrigerators
Dermatological photo-therapy equipments

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MORE MCQ ON Environmental Engineering in CE

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