# Civil Engineering - GATE Exam Questions - Discussion

### Discussion :: GATE Exam Questions - Section 6 (Q.No.39)

39.

A circular sewer 2 m diameter has to carry a discharge of 2 m3/s when flowing nearly full. What is the minmum required slope to initiate the flow ? (Assume Manning's n = 0.015)

 [A]. 0.00023 [B]. 3.6e-05 [C]. 9.1e-05 [D]. 1.4e-05

Explanation:

No answer description available for this question.

 Amit Padiyar said: (Nov 26, 2016) Q = (1/n) * R^(2/3) * s^.5 * d2/4. S = .00023 ans.

 Lee said: (May 2, 2017) Yes, option A is the right answer. Agree @Amit.

 Phani said: (May 7, 2018) C is correct. V = 1/n x r^2/3 x s^1/2. Q = AxV. 2 = pai/4x4 x 1/0.015 x 1^2/3 x s^1/2, S = 9*10^-4 = 0.00009.

 Kunti said: (Sep 25, 2018) You are right @Phani.

 Shivaprasad Sajjan said: (Feb 20, 2019) .00009 is correct. You are right @Phani.

 Vivek Mishra said: (Jun 8, 2019) @Phani. Hydraulic mean depth for circular section is 28D for max discharge and 3D for maximum velocity then how could you take m= 1?

 Prem said: (Sep 11, 2019) I think A is correct one.

 Mahesh Sinh said: (May 23, 2020) According to me, A is the correct answer.