Civil Engineering - UPSC Civil Service Exam Questions - Discussion


The upstream slope of an earth dam under steady seepage condition is

[A]. equipotential line
[B]. phreaticline
[C]. flow-line
[D]. seepage line

Answer: Option A


No answer description available for this question.

Chandru Mg said: (May 21, 2017)  
Phreatiline = The top flow line of a saturated soil mass, below which seepage takes place, is called the Phreatic line.

Flow Lines = are the paths which water particle follow in the course of seepage. Water flows from the point of higher head to low head.

Equipotential lines =are the lines formed by joining the points of same head or potential on the flow lines.

Suresha said: (Jul 2, 2018)  
Option "B" is right.

Rohit Pal said: (Nov 25, 2018)  
Phreatic line is the right answer.

Lekhya said: (Dec 30, 2018)  
Can you please explain how can it be the equipotential line?

Puneeth said: (Jan 8, 2019)  
I think it is a phreatic line.

Ankit Kumar Sahoo said: (Jul 24, 2019)  
Phreatic line is the correct option.

Arvind Yadav said: (Apr 25, 2020)  
Phreatic line is the right answer.

Anil Kumar Yadav said: (Aug 5, 2020)  
'A' is the correct option. Equipotential lines are perpendicular to flow line.

Arthaat Chaudhary said: (Dec 7, 2020)  
Yes, option A is correct.

Kauntikeya Singh said: (Dec 8, 2020)  
Option A is correct.

Madan said: (Jan 31, 2021)  
The shape of Phreatic line is parabola starting from the point of junction of the water level and the embankment with 90° angle.

Akshay said: (Feb 7, 2021)  
At the upstream slope of the earthen dam, there exists 100 per cent equipotential line on its surface.

As further equipotential lines are drawn with a subsequent drop in the head in the flow net mesh.

Jadugar said: (Mar 25, 2021)  
The equipotential line is the correct answer.

Nasir said: (Oct 13, 2021)  
Upstream slope is perpendicular to phreatic line. Moreover phreatic line is parabolic in nature and upstream slope is not.

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