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Waste Water Engineering

Waste Water Engineering
A manhole is classified as shallow if its depth is between

0.7 to 0.9 m
0.5 to 0.7 m
0.9 to 1.20 m
0.4 to 0.5 m

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Waste Water Engineering
At the junction of sewers

Top of smaller sewer is kept lower
Top of larger sewer is kept lower
None of these
Tops of both the sewers are at the same level

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Waste Water Engineering
The disintegrating pump in which solid matter is broken up before passing out, is

None of these
Reciprocating pump
Pneumatic ejector
Centrifugal pump

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Waste Water Engineering
For laying a sewer line in a trench of 2 m width, an offset line is marked on the ground parallel to the given centre line at a distance of

120 cm
140 cm
100 cm
160 cm

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Waste Water Engineering
Large diameter sewers subjected to external pressure alone, are reinforced

Near the inner surface of the pipe
Near the outer surface of the pipe
Both A and B
With elliptical cage

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Waste Water Engineering
If the grit in grit chambers is 4.5 million litres per day, its cleaning is done

Mechanically
Hydraulically
Manually
Electrically

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