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Environmental Engineering

Environmental Engineering
Laying of sewers is usually done with the help of

A Theodolite
A compass
A plane table
Sight rails and boning rods

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Environmental Engineering
The main disadvantage of cement concrete sewers is

Difficulty in transportation due to heavy weight
Less strength
Less life
Difficulty in construction

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Environmental Engineering
When there is no recirculation of sewage, then recirculation factor is

None of these
Infinity
1

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Environmental Engineering
Select the correct relationship between porosity (N), specific yield (y) and specific retention (R)

R > (N + y)
N = y + R
R = N + y
y = N + R

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Environmental Engineering
Percentage of bacterial load that can be removed from water by the process of plain sedimentation is about

75
59
100
50

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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

Separate system
Partially combined system
Partially separate system
Combined system

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