1.13. Energy and Hydraulic Grade Line

Try these first

1. 1.

   What is the formula for calculating head loss due to sudden enlargement?

   Hint

   Refer to the loss coefficients discussed.

2. 2.

   What value is usually taken for the K entrance?

   Hint

   Think about standard assumptions in pipe flow.

3. 3.

   What is the primary reason for head loss during sudden enlargement?

   • Increase in velocity
   • Decrease in pressure
   • Change in elevation

   Hint

   Think about the energy conservation principles.

4. 4.

   True or False: The K entrance is always equal to 1.

   • True
   • False

   Hint

   Consider common assumptions in fluid dynamics.

5. 5.

   A 6-inch diameter pipe transitions into a 12-inch diameter pipe suddenly. Calculate the head loss when the water velocity in the smaller pipe is 3 m/s. Assume g = 9.81 m/s².

   Hint

   Ensure proper calculations for area ratios and remember units.

6. 6.

   You have a pipe system where the K entrance is 0.4, and the flow exits into a tank. If the velocity is 1.5 m/s, calculate the head loss at the entrance.

   Hint

   Stay focused on the correct formula for entrance loss.