9.1.3. Manometers

Try these first

1. 1.

   What is the primary function of a manometer?

   Hint

   Think about how pressure is determined in fluids.

2. 2.

   Define a piezometer.

   Hint

   Consider how this device is structured.

3. 3.

   What does a manometer primarily measure?

   • Temperature
   • Pressure
   • Volume
   • Density

   Hint

   Think about what we discussed concerning fluid mechanics.

4. 4.

   True or False: Inclined manometers can only be used for high-pressure systems.

   • True
   • False

   Hint

   Recall how the incline amplifies readings.

5. 5.

   A U-tube manometer measures pressure in a hydraulic system. The pressure at point P1 is 200 kPa, while P2 is unknown. The liquid in the tube is mercury with a height difference of 0.3 m. Find P2 accounting for mercury's density.

   Hint

   Use pressure principles along with the hydrostatic equilibrium equations.

6. 6.

   In an inverted U-tube manometer, the manometric liquid has a density of 900 kg/m³. The working fluid’s density is 1,000 kg/m³, with recorded heights as 0.5 m for the lighter fluid. Calculate the necessary pressure difference.

   Hint

   Remember that inverting changes the interpretation of height in your equations.