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Environmental Engineering

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

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

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Environmental Engineering
Facultative bacteria are able to work in

Presence of water
Presence as well as in absence of oxygen
Presence of oxygen only
Absence of oxygen only

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Environmental Engineering
The type of sewer which is suitable for both combined and separate system is

Egg shaped sewer
Horseshoe type sewer
Circular sewer
Semi-elliptical sewer

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Environmental Engineering
The type of valve which is provided to control the flow of water in the distribution system at street corners and where the pipe lines intersect is

Scour valve
Safety valve
Sluice valve
Check valve

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Environmental Engineering
The rate of BOD exerted at any time is

Directly proportional to BOD satisfied
Inversely proportional to BOD satisfied
Directly proportional to BOD remaining
Inversely proportional to BOD remaining

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Environmental Engineering
The layout of distribution system in which water flows towards the outer periphery is

Ring system
Radial system
Grid iron system
Dead end system

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