Statement I: For ideal flow without losses in a constant diameter pipe the Energy grade line is always horizontal and Hydraulic gradient line is parallel to the Energy grade line.
Statement II: Hydraulic gradient line is defined as the line which gives the sum of pressure head (p/γ) and datum head (z) of a flowing fluid in a pipe w.r.t some reference line.
1
Both Statement (I) and Statement (II) are individually true and Statement (II) is the correct explanation of Statement (I).
2
Both Statement (I) and Statement (II) are individually true but Statement (II) is not the correct explanation of Statement (I).
3
Statement (I) is true but Statement (II) is false.
4
Statement (I) is false but Statement (II) is true.