In the analysis of networks of pipes,
- Athe head loss around each elementary circuit must be zeroCorrect
- Bthe head loss in all circuits is the same
- Cthe elevation of hydraulic grade line is assumed for each junction
- Delementary circuits are replaced by equivalent pipes.
Solution
Concept
Loop condition
Step-by-step solution
1. Algebraic sum of head losses around a loop = 0.
Explanation
Energy conservation in a loop.
Why the other options are wrong
Other options are not the rule.
Shortcut
Σh = 0.
Correct answer: A) the head loss around each elementary circuit must be zero