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Environmental Engineering in CE

Environmental Engineering in CE
COD of raw municipal sewage may be in the range of about __________ mg/litre.

1-2
90-120
1500-2500
5-10

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Environmental Engineering in CE
Inhalation of lead compounds present in the automobile exhausts (using leaded petrol) causes

All of these
Nervous system disorder
Anaemia
Blood poisoning

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Environmental Engineering in CE
Aerosols present in atmospheric air may be

Negatively charged
Positively charged
Combination of all A, B & C
Neutral

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Environmental Engineering in CE
Which of the following is an adsorbant for removal of nitrogen oxides from gas/air?

Pulverised limestone
Active carbon
Bog iron (iron oxide)
Silica gel

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Environmental Engineering in CE
Atmospheric pollution caused by the exhaust gas of supresonic transport air-crafts is mostly in the atmospheric region called

Troposphere
Mesosphere
Stratosphere
Thermosphere

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

250
1000
1
10

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