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Waste Water Engineering

Waste Water Engineering
For large sewers, maximum distance between manholes may be

100 m
50 m
300 m
200 m

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Waste Water Engineering
‘Cowl’ is provided at

First step in manhole
Upper end of the manhole
Lower end of ventilating column
Upper end of ventilating column

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Waste Water Engineering
The minimum recommended diameter of sewers, is

10 cm
20 cm
5 cm
15 cm

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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
Hydrogen sulphide
Carbon dioxide
Methane

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Waste Water Engineering
The self-cleansing velocity of water flowing through pipe lines, is

0.25 metre/sec
0.5 metre/sec
2 metres/sec
1 metre/sec

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Waste Water Engineering
The following is the physical characteristic of sewage

Odour
Turbidity
Colour
All listed here

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MORE MCQ ON Waste Water Engineering

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