Civil Engineering - Waste Water Engineering - Discussion

33. 

If the side of a square sewer is 1000 mm, the diameter of a hydraulically equivalent circular section, is

[A]. 1045 mm
[B]. 1065 mm
[C]. 1075 mm
[D]. 1095 mm.

Answer: Option D

Explanation:

No answer description available for this question.

Md Faizan Alam said: (May 31, 2015)  
Please explanation.

Seazzzz said: (Oct 26, 2015)  
de = 1.30 x((a x b)^0.625/(a + b)^0.25).

where a and b are sides of rectangle. Here a = b since we are dealing with square.

Rajmohan said: (Nov 30, 2015)  
Level of sewage flow required. If 3/4 full flowing. Then calc Hyd radius of channel and equate HYD with circular section HYD.

Lakshmi said: (Jan 22, 2016)  
By using manning's formula:

Discharge of square pipe = Discharge of circular pipe.

Ankur said: (Nov 22, 2016)  
Two section of different shapes is said to be hydraulically equivalent if they carry same discharge while running full on the same grade and are of the same material.

Ksd said: (May 15, 2017)  
Relation between circular and square sewers is (pi*D^(8/3))=(4*B^(8/3)),
where D- diameter of circular sewer and B- side of a square sewer.

Sourav said: (Jul 26, 2017)  
@Lakshmi then 1000^2= πD^2/4.
Then D=1128.

Zahir Shah said: (Aug 17, 2017)  
Relation between square and circular sewer :-
π * D^(8/3) = 4 * b^(8/3)
D^(8/3) = 4 * b^(8/3)
D^(8/3) = 4 * 1000^(8/3)/ 3.14
D^(8/3) = 127323954.47
Or D = 127323954.47^(3/8)
So D = 1094.82 say 1095.

Dhanu said: (Sep 6, 2017)  
d=1.094b.
b=side of square.
d=dia of crcular section.
D=1.094 * 1000 = 1094.

Abhishek said: (Jan 7, 2018)  
D=1.1B.

It is the relation between circular and square sewer.

Priya said: (Mar 24, 2018)  
Thanks @Dhanu.

Gugu said: (Aug 10, 2018)  
@Dhanu.

How 1.094?

Rishish Saxena said: (Aug 9, 2019)  
The ratio of the dia of a circular section and the side of a square section hydraulically equivalent is 1.095.

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