29. is used in
A. Chezy's formula (c) Kutter's
B. Bazin's formula
C. Manning's formula.
D.

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30. 9.32. The value of Chezy's constant is used in
A. Chezy's formula
B. Bazin's formula
C. Kutter's formula
D. Manning's formula.

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31. The formula V = -n r32/,47--S used for determining flow velocities in sewers, is known as
A. Chezy's formula
B. Bazin's formula
C. Kutter's formula
D. Manning's formula.

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32. The formula which accepts the value of rugosity coefficient n = 0.012 to be used in Manning's formula, is given by
A. Bazin
B. Crimp and Bruge
C. William-Hazen
D. Kutter.

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33.  If ??, is the unit weight of water, r the hydraulic mean depth of the sewer and S the bed slope of the sewer, then the tractive force exerted by flowing water, is
A. yw. r.S
B. y,, 7'112. S
C.( c) y?, r g
D. y?, r2/3 Arg.

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34. The porosity of sediments in sewer pipes, is usually taken as
A.0.01
B.0.011
C.0.012
D.0.013

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35.  A sewer pipe contains 1 mm sand particles of specific gravity 2.65 and 5 mm organic particles of specific gravity 1.2, the minimum velocity required for removing the sewerage, is
A. 0.30 m/sec
B. 0.35 m/sec
C. 0.40 m/sec
D. 0.45 m/sec

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