1.5.2. Hinge Moment Calculation

Try these first

1. 1.

   Define hydrostatic pressure.

   Hint

   Think about how fluid weight contributes to pressure.

2. 2.

   What is the equilibrium condition for forces?

   Hint

   Consider balance; what do you need for no net movement?

3. 3.

   What is the main principle of hydrostatic pressure?

   • Pressure increases with depth
   • Pressure decreases with depth
   • Pressure remains constant

   Hint

   Think about what happens as you go deeper in a pool.

4. 4.

   True or False: The resultant force on a submerged surface acts at its centroid.

   • True
   • False

   Hint

   Remember the geometry of the object.

5. 5.

   You have a triangular gate submerged at a 45-degree angle at a depth of 3m in water. Determine the required force to maintain its equilibrium against the water pressure.

   Hint

   Consider how pressure acts differently at various points along the gate.

6. 6.

   An inclined manometer shows fluid heights of 150mm of oil (specific gravity 0.8) and 100mm of water. What is the pressure at the gas pipeline connection?

   Hint

   How do the heights relate to pressures based on specific gravities?