20.4. Bernoulli's Equations

Try these first

1. 1.

   Define Bernoulli’s equation.

   Hint

   Think about how pressure, velocity, and height are related.

2. 2.

   What type of flow is characterized by smooth lines?

   Hint

   Consider whether the fluid moves in an organized fashion.

3. 3.

   What does Bernoulli's equation relate in a fluid system?

   • Pressure and velocity
   • Only velocity
   • Only pressure

   Hint

   Think about what factors are involved in fluid dynamics.

4. 4.

   True or False: Minor losses have a negligible effect on fluid flow.

   • True
   • False

   Hint

   Consider how fittings might affect flow.

5. 5.

   A pipe with a diameter of 0.2 m has water flowing at a velocity of 3 m/s. If the flow is restricted by a valve with a K-factor of 0.2, calculate the head loss due to this restriction.

   Hint

   Make sure to square the velocity and divide by two times the gravity.

6. 6.

   Compare the energy loss between a gate valve and a globe valve with the same diameter with respective K factors of 0.1 and 0.15, given the flow conditions in a directly connected pipe.

   Hint

   Remember to apply the K factors correctly to find relative losses.