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Waste Water Engineering

Waste Water Engineering
In circular sewers if depth of flow is 0.2 times the full depth, the nominal gradient,

Is trebled
Is not enough
Is only provided
Is doubled

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Waste Water Engineering
Clogging of sewers, is caused due to

Low discharge
All of these
Silting
Greasy and oily matters

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

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

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Waste Water Engineering
The minimum diameter of a sewer is kept

20 cm
10 cm
15 cm
25 cm

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Waste Water Engineering
In sewers the velocity of flow should not be

Less than 10 m/sec
More than 20 m/sec
Less than the self-cleansing velocity
More than the self-cleansing velocity

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Waste Water Engineering
A nuisance is experienced in diluting water if dilution factor is less than

60
100
40
20

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