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Environmental Engineering in CE

Environmental Engineering in CE
Siderosis is a disease caused by the inhalation of __________ dust.

Silica
Coal
Iron
None of these

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Environmental Engineering in CE
From pollution control point of view, the maximum permissible concentration of sulphur dioxide in atmospheric air is about __________ ppm.

5
500
50
1

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Environmental Engineering in CE
Foaming and priming in boiler operation can be reduced by reduction in __________ in feed water.

All of these
Color (Hazen)
Total solids
Turbidity

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

Gritty & inorganic
Suspended solid
Dissolved solid
Oil & fatty

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Environmental Engineering in CE
A standard test for determination of hardness in water is termed as __________ test.

Electometric
EDTA
Total count
Presumptive

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Environmental Engineering in CE
TLV of mercury in potable (drinking) water is about __________ ppm.

5
0.1
1
0.001

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