Mechanical Engineering - Hydraulics and Fluid Mechanics - Discussion

40. 

The loss of head due to an obstruction in a pipe is twice the loss of head at its entrance.

[A]. Agree
[B]. Disagree

Answer: Option A

Explanation:

No answer description available for this question.

Wazeda Begum said: (Nov 18, 2014)  
Loss of head at exit of a pipe is twice the loss of head at it's entrance.

Sajim Shah said: (Nov 11, 2015)  
Loss of head at entrance = 0.5 V sq/2g.

Loss of head due to obstruction = V sq/2g.

Sanjeev said: (Jan 13, 2018)  
The loss of head due to an obstruction is dependent on the cross-section of the obstruction, So it is not fixed and has a dependency on the cross-section of pipe and the cross-section of obstruction.

Head loss = V sq /2g *(A/((A-a)*Coefficient of cont.)-1) sq.
A = area of the pipe.
a = area of obstruction.

Deepak Rathva said: (Jun 8, 2018)  
Option B Disagree is the correct answer.

Sandeep said: (Mar 13, 2020)  
Please explain completely.

Rashid Khan Kakar said: (May 29, 2021)  
@Deepak rathva.

Explain your answer.

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