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Environmental Engineering in CE

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

Coal
Iron ore
Uranium ore
Lime

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Environmental Engineering in CE
Which of the following gases is having the widest explosion limit (about 2 to 81% gas in gas-air mixture), rendering it the property of the most explosive gas?

Ammonia
Carbon monoxide
Acetylene
Hydrogen

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

250
10
1
1000

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Environmental Engineering in CE
Industrial workers working in leather tanning & manufacturing units are prone to suffer from

Skin diseases (e.g. dermatities)
Silicosis
Respirtory ailments (e.g. bronchitis)
Blurred vision

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Environmental Engineering in CE
Ambient noise level can be reduced by __________ decibels by planting trees (like coconut, neem etc.) near public utility buildings (like hospitals & schools).

43832
15-20
43961
25-30

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Environmental Engineering in CE
Death may occur, when SO₂ concentration in atmospheric air exceeds __________ ppm.

20
100
400
200

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