# Civil Engineering - UPSC Civil Service Exam Questions - Discussion

1.

A rectangular channel of 2.5 m width and 2 m depth of water carries a flow of 10 m3/s. The specific energy for the flow is given by

 [A]. 1.18 m [B]. 3.4 m/s [C]. 2.0 m/s [D]. 2.2 m

Explanation:

No answer description available for this question.

 Penny said: (Apr 10, 2017) I think the correct answer is D.

 Chhaya said: (Jun 8, 2017) How to calculate it? @Penny. Please, anyone explain the solution.

 Abirami said: (Jun 30, 2017) How to calculate it ?

 Arya said: (Jul 12, 2017) Emin = 3/2Yc, Yc=(q2/g)^(1/3), q=Q/B.

 Roy said: (Nov 28, 2017) Answer should be D, E=h+v^2/2g.

 Bhutan said: (Jun 4, 2019) We have E = h+v^2/2g Here B=2.5m, H = 2m and Q = 10m^3/s. q = Q/B = 10/2.5 = 4m^2/s. V = q/h = 4/2 = 2m/s. E = 2+2^2/(2*9.8) = 2.2m.

 Pranjul Sahu said: (Jul 30, 2019) Specific energy define as channel bed to TEL head and its =y^2 + v^2/2g and v calculate by continuity equation Q=av hence option D is correct.

 Naveed Kamal Marwat said: (Sep 22, 2021) Here E=h+v^2/2g.