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Environmental Engineering in CE

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

Both B & C
Asphyxiation
Tuberculosis
Shortness of breath

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Environmental Engineering in CE
Black smoke coming out of the chimney of a furnace is an indication of the use of __________ in the furnace.

Large quantity of excess combustion air
Low amount of excess combustion air
Hydrocarbon fuel
Pulverised coal as fuel

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Environmental Engineering in CE
In troposphere (the weather domain), the temperature 't' at height 'h' above the spa level in metres is given by (where, temperature at sea level is 15°C and t is in °C.)

t = 15 - 0.0065h
t = 15 + 0.0065h
t = 0.0035h -15
t = 15 - 0.0035h

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Environmental Engineering in CE
Dose of chlorine for disinfection of water is about __________ mg/litre of water.

1
0.1
0.01
0.3

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Environmental Engineering in CE
Presence of soluble organics in polluted water causes

Fire hazards
Undesirable plants growth
Explosion hazards
Depletion of oxygen

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Environmental Engineering in CE
The maximum permissible noise level to which a man working in a chemical plant can be exposed for eight hours per day is about __________ decibels.

105
90
120
60

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