SSC JE Mechanical Engineering 2018 Set 5 Paper

In series-pipe applications the head losses through each pipe are added to obtain the total head loss.
${\mathit{Q}}_{\mathit{A}}={\mathit{Q}}_{\mathit{B}}={\mathit{Q}}_{\mathit{C}}=\mathit{Q}$
Application of Bernoulli's equation between Secs.
1 and 2 gives ${\mathit{H}}_1-{\mathit{H}}_2={\mathit{h}}_{\mathit{f}}$