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Environmental Engineering in CE

Environmental Engineering in CE
Presence of __________ in water stream are deleterious to aquatic life.

Suspended solids
All of these
Heavy metals and cynides
Soluble and toxic organics

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Environmental Engineering in CE
Radioactive substances present in the polluted water stream can be removed by

Adsorption in ion exchange materials
Biological oxygen treatment
Coagulation and filtration
None of these

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Environmental Engineering in CE
Noise pollution level in a chemical plant is expressed in

Decibel
Hertz
None of these
Roentgen

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Environmental Engineering in CE
Maximum permissible concentration (i.e. TLV) of DDT in public water supply system is __________ micro gram (μ g)/litre.

2
42
1050
332

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Environmental Engineering in CE
Presence of __________ hardness is responsible for the temporary hardness in water.

Choride
Calcium
Carbonate
Sulphate

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

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

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