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Waste Water Engineering

Waste Water Engineering
The discharge per unit plan area of a sedimentation tank, is generally called

All of these
Over flow rate
Over flow velocity
Surface loading

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Waste Water Engineering
Hazen’s formula VS = 418 (GS – Gw)d [(3T + 70)/100] is used for the settlement velocity of the particles of diameter

Greater than 0.1 mm
Less than 0.01 mm
Less than 0.1 mm
Less than 0.05 mm

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Waste Water Engineering
If the peak discharge of a storm water drain (S.W. Drain) is expected to exceed 150 cumecs, the free board to be provided, is

100 cm
90 cm
50 cm
80 cm

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Waste Water Engineering
The maximum diameter of sewers adopted in the designs is

2.0 m
4.0 m
1.0 m
3.0 m

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Waste Water Engineering
A sewer running partially full and hurried with back filled, fails in compression due to

All listed here
Weight of the back fill
Superimposed traffic loads
Weight of the pipe

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Waste Water Engineering
In sewers the highest non-scouring velocity is achieved in

Stone ware sewers
Glazed bricks sewers
Cement concrete sewers
Cast iron sewers

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