Which of the following is/are correct?
1
To increase the discharge under a given head pipe must be installed in parallel.
2
When pipes are installed in series Then discharge will be more for larger diameter pipes.
3
In a real fluid flow hydraulic gradient line (HGL) can rise or fall but the Total Energy Line (TEL) will always falls.
4
The points above the Hydraulic Gradient Line (HGL) in a fluid pipe network always have positive pressure.