1.2. Pipes in Series

Try these first

1. 1.

   What is the definition of head loss in a pipe?

   Hint

   Think about what happens to energy as fluid moves through a pipe.

2. 2.

   What is considered a major loss in a pipe?

   Hint

   Focus on the primary cause of losses in fluid mechanics.

3. 3.

   In flow through pipes in series, the discharge is:

   • a. Variable
   • b. Constant
   • c. Increasing

   Hint

   Think about how water behaves when pushed through connected tubes.

4. 4.

   In a straight pipe, if the diameter increases, the friction loss generally:

   • a. Increases
   • b. Decreases
   • c. Remains unchanged

   Hint

   Visualize how wider pipes handle flow compared to narrower ones.

5. 5.

   A plumbing system consists of three pipes in series with lengths of 30 m, 50 m, and 20 m, and diameters of 0.1 m, 0.15 m, and 0.2 m respectively. The friction factor for all is 0.015. Calculate the total head loss if the velocity of fluid in the system is 2 m/s.

   Hint

   You need to apply the formula individually and account for each section.

6. 6.

   Two pipes with different diameters, 0.2 m and 0.1 m, are connected in series. The flow rate is required to be 3 m/s in the larger pipe. What effect will this have on the velocity in the smaller pipe, and how would that affect head loss?

   Hint

   Remember that smaller diameters generally lead to increased speed and, thus, increased friction.