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Waste Water Engineering

Waste Water Engineering
The gas which may cause explosion in sewers, is

Ammonia
Carbondioxide
Methane
Carbon monoxide

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Waste Water Engineering
Boussinesq’s equation for ascertaining unit pressure at a depth on sewers due to traffic loads, is

pt = 2H3p/3 Z5
pt = 3H3p/2 Z5
pt = 2H3p/3 Z5
pt = 3H3p/2 Z5

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Waste Water Engineering
Dry weather flow is:

Water supply allowance per capita
Average annual rate of flow
Average daily rate of flow
Average monthly rate of flow

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Waste Water Engineering
If the flame of a miner’s safety lamp in a manhole extinguishes within 5 minutes, the sewer certainly contains

Oxygen
Carbon dioxide
Hydrogen sulphide
Methane

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Waste Water Engineering
Design period of 40 to 50 years is adopted for

Main sewers
Branch sewers
All listed here
Trunk sewers

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Waste Water Engineering
The arrangement made for passing the sewer line below an obstruction below the hydraulic gradient lines called

Sag pipe
all of these
Inverted syphon
Depressed sewer

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MORE MCQ ON Waste Water Engineering

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