1.4. Friction Factor

Try these first

1. 1.

   What is the friction factor and why is it important?

   Hint

   Think about its role in flow and pressure drop.

2. 2.

   Define the term Reynolds number.

   Hint

   It determines the flow regime.

3. 3.

   What is the main purpose of the friction factor in pipe flow?

   • To measure flow rate
   • To evaluate energy loss
   • To calculate pipe diameter

   Hint

   Focus on its role in hydraulic engineering.

4. 4.

   True or False: Minor losses have a greater impact on total head losses than major losses.

   • True
   • False

   Hint

   Consider the relative significance of each loss type.

5. 5.

   A water pipe with a diameter of 0.1m and length of 50m has a roughness height of 0.005m. If the velocity of water is 1.5 m/s, calculate the friction factor and the head loss using the Darcy-Weisbach equation.

   Hint

   You need to check if the flow is laminar or turbulent first!

6. 6.

   Design a piping system to limit head loss to 5m for a flow of 75 liters per minute over a 100m length pipe. If the roughness is 0.01m, calculate the appropriate diameter of the pipe.

   Hint

   Use Q = A * V to relate the diameter to the flow.