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Environmental Engineering in CE

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

Fire hazards
Explosion hazards
Depletion of oxygen
Undesirable plants growth

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

70
25
85
50

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Environmental Engineering in CE
Which of the following is not a source of ozone emission in the atmosphere?

Xerox machines
Dermatological photo-therapy equipments
High voltage electrical equipments
Refrigerators

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Environmental Engineering in CE
High noise level in a chemical plant can be controlled by the

Suppression of noise at the source itself
Path control of noise
Protection of operating personnel
All of these

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

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

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Environmental Engineering in CE
Cleaning is done by(i) Scraping and removal in filters slow sand(ii) Back washing in slow sand filters(iii) Scraping and removal in filters rapid sand(iv) Back washing in rapid sand filtersThe correct answer is

(ii) and (iv)
(ii) and (iii)
(i) and (ii)
(i) and (iv)

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