# 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

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.