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Environmental Engineering in CE

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

Hertz
None of these
Roentgen
Decibel

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

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

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Environmental Engineering in CE
TLV of ozone (O₃) and phosgene (COCl₂) in air is __________ ppm.

1000
0.1
100
25

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Environmental Engineering in CE
Pollution by particulate matter emission in the atmosphere does not take place during metal

Cutting
Grinding
Polishing
Machining

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Environmental Engineering in CE
Inhalation of silica dust by human being during hand drilling in mica mining, lead & zinc mining, silica refractory manufacture and in foundaries causes

All of these
Asphyxiation (suffocation)
Tuberculosis
Shortness of breath

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Environmental Engineering in CE
Hydrogen ion concentration in distilled water is

7 x 10⁷
10⁻⁷
7 x 10⁻⁷
10⁷

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