Civil Engineering - UPSC Civil Service Exam Questions - Discussion

30. 

In a V-notch, an error of 1% in the measurement of head would constitute in the discharge measurement, an error of

[A]. 1.0%
[B]. 1.5%
[C]. 2.0%
[D]. 2.5%

Answer: Option D

Explanation:

No answer description available for this question.

Naveed Iqbal said: (Nov 29, 2017)  
w=eS/Gs where S=1.

w= 0.78*1/2.60*100 = 30%.

Dhaval Shah said: (Dec 22, 2018)  
2.5- triangular notch.
1.5- rectangular notch.

Dibakar said: (Jun 18, 2021)  
Q = (8/15)cd tan theta/2 √(2g) H^2.5.

Let Q=kH^2.5.
Differentiation w.r.t head(H),
dQ=k 2.5 H^1.5 dH,
So, now (dQ/Q) = 2.5dH.

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