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Environmental Engineering in CE

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

5
0.1
0.001
1

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Environmental Engineering in CE
Inhalation of silica dust by human being causes

Asphyxiation
Both B & C
Shortness of breath
Tuberculosis

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Environmental Engineering in CE
The common pollutant generated in chlor-alkali industry and battery manufacture is

Brine
Phosphate
Mercury
None of these

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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.

332
1050
2
42

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Environmental Engineering in CE
Inorganic impurities causing water pollution is

Carbohydrates
Protein
Fats
Salts of metals

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Environmental Engineering in CE
Noise level in a quiet private business office is about __________ decibels.

50
85
25
70

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