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Waste Water Engineering

Waste Water Engineering
The recommended detention period for grit chambers is

3 minutes
5 minutes
1 minute
2 minutes

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Waste Water Engineering
The laying of sewers is done with

Clinometer
Theodolite
Level
Magnetic compass

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Waste Water Engineering
Rate of flow of sewage is generally assumed

More than the rate of water supply
Less than the rate of water supply
At 150 litres per capita
Equal to the rate of water supply

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Waste Water Engineering
Hume steel pipes are

Both B and C
Steel pipes
Steel shell coated from outside with cement mortar
Steel shell coated from inside with cement mortar

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Waste Water Engineering
For a peak discharge of 0.0157 cumec, with a velocity of 0.9 m/sec, the diameter of the sewer main, is

18 cm
12 cm
15 cm
10 cm

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Waste Water Engineering
If the flame of a miner's safety lamp in the upper layers of the sewer forms an explosive, the sewer certainly contains

Oxygen
Carbon dioxide
Hydrogen sulphide
Methane

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MORE MCQ ON Waste Water Engineering

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