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Environmental Engineering in CE

Environmental Engineering in CE
Maximum permissible turbidity in potable water is __________ ppm.

1
250
10
1000

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Environmental Engineering in CE
Death may occur, when SO₂ concentration in atmospheric air exceeds __________ ppm.

20
400
100
200

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Environmental Engineering in CE
Septic tank is a(i) Settling tank(ii) Digestion tank(iii) Aeration tank

Only (iii)
(i) and (ii)
(i) and (iii)
Only (i)

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

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

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Environmental Engineering in CE
Main pollutant present in automobile exhaust is

Hydrocarbons
CO₂
NO
CO

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Environmental Engineering in CE
Operating principle of cyclone separator is based on the action of __________ dust particles.

Gravitational force on
Diffusion of
Centrifugal force on
Electrostatic force on

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