Civil Engineering - UPSC Civil Service Exam Questions - Discussion

Discussion Forum : UPSC Civil Service Exam Questions - Section 22 (Q.No. 38)
38.
If a sluice gate produces a change in the depth of water from 3.0 m to 0.6 m, then the force on the gate is about
9.5 kN/m
19.0 kN/m
38.0 kN/m
76.0 kN/m
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
11 comments Page 1 of 2.

Naveed said:   8 years ago
Option C is the correct Answer.

F/b = 1/2 ρg (h1-h2)3/(h1+h2) = 37.6 say 38.

Diya gupta said:   7 years ago
Please explain it clearly.

Ankit said:   7 years ago
How to get this answer? Please explain.

Veronica Roy said:   7 years ago
Anyone can elaborate it please?

Sirajuddin said:   5 years ago
Answer is (b).
(1)

Siraj said:   5 years ago
Force per unit width = 4.905*(d1 - d2)^3/(d1+d2).

So, B is the correct answer.
(2)

Apcivilian said:   3 years ago
Yes the answer is B.
(1)

Jawad Ali said:   3 years ago
@Siraj.

From where 4.905 comes?

RAHUL VERMA said:   3 years ago
Option C is correct.
force = Y*(y2-y1)^3/y1y2
= 9810 * 2.4^3/ 3*0.6.
= 38.
(3)

Radhika said:   7 months ago
F = (F1+F2)/2.
F1 = ρgh1×A(h1-h2).
F2 = ρgh2×A(h1-h2).
So, the answer will come closer to 38kN/m.


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