1.1. Basics of fluid mechanics-II (contd.)

Try these first

1. 1.

   What are the three main assumptions of Bernoulli's equation?

   Hint

   Think about what conditions are needed for energy conservation to apply.

2. 2.

   What does the hydraulic grade line represent?

   Hint

   Consider the energy components that contribute to HGL.

3. 3.

   What does Bernoulli's equation represent?

   • Conservation of mass
   • Conservation of energy
   • Conservation of momentum

   Hint

   Remember the key concept of energy in a flowing fluid.

4. 4.

   True or False: Bernoulli’s equation applies across different streamlines.

   • True
   • False

   Hint

   Recall the definition and conditions that define streamline flow.

5. 5.

   A horizontal pipe has a diameter of 0.5 m at point A and 0.2 m at point B. If the fluid is water at a pressure of 50 kPa at A, find the pressure at point B assuming no height differences.

   Hint

   Use A1V1 = A2V2 for the velocities and substitute into Bernoulli's equation.

6. 6.

   Water flows from a tank through a pipe with a valve. The height of the water tank is 10 m; find the velocity of water at the exit of the valve, assuming atmospheric pressure at the exit.

   Hint

   Why does the tank height matter for the exit velocity?