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Environmental Engineering

Environmental Engineering
The characteristics of fresh and septic sewage respectively are

Both acidic
Both alkaline
Alkaline and acidic
Acidic and alkaline

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Environmental Engineering
An egg shaped section of sewer

Provides self cleansing velocity at low discharges
Is economical than circular section
Is easy to construct
Is more stable than circular section

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Environmental Engineering
If the time of concentration is 9 minutes, then the intensity of rainfall according to British Ministry of Health formula will be

10 mm/hr
20 mm/hr
4 mm/hr
40 mm/hr

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Environmental Engineering
Corrosion in concrete sewers is caused by

Dissolved oxygen
Chlorine
Nitrogen
Septic conditions

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Environmental Engineering
For a country like India, where rainfall is mainly confined to one season, the suitable sewerage system will be

Combined system
Partially separate system
Separate system
Partially combined system

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Environmental Engineering
As compared to cast iron pipes, steel pipes are

Less susceptible to corrosion
Costlier
Stronger
Heavier

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MORE MCQ ON Environmental Engineering

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