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Waste Water Engineering

Waste Water Engineering
Sewer manholes are generally provided at

All of these
The change of direction
The change of gradient
The junctions of sewers

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Waste Water Engineering
If is the diameter of upper circular portion, the overall depth of a standard egg shaped section, is

1.15 D
1.75 D
1.5 D
1.25 D

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Waste Water Engineering
House connections to the laterals is generally made by

P.C.C.
R.C.C.
Glazed stonewares
Cast iron

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Waste Water Engineering
For sewer mains of 0.5 to 1 m diameter, the ratio of maximum daily sewage flow to the average daily sewage flow is assumed

1.5
3
2.5
2

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Waste Water Engineering
Facultative bacteria survive in

Both cases A and B
The presence of oxygen
The absence of oxygen
Neither A nor B

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Waste Water Engineering
The reduced levels of the string at the consecutive sight rails A and B are 203.575 m, 203.475 m respectively. If the difference of their R.D.s is 10 m, the gradient of the sewer line is

1 in 503 upward
1 in 500 upward
1 in 100 upward
1 in 100 downward

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