Fluid Mechanics: Head Pressure and Gauges
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Questions and Answers

What is the head pressure exerted by 10 ft of a liquid with a specific gravity of 1.3 in an open tank?

  • 2.87 psi
  • 4.30 psi
  • 5.69 psi (correct)
  • 3.00 psi
  • How much total pressure is exerted by 12 ft of liquid with a specific gravity of 0.9 and 7 psi of nitrogen pressure in a closed vessel?

  • 10.8 psi
  • 12.5 psi
  • 15.0 psi
  • 11.6 psi (correct)
  • What does a pressure gauge read located 5 ft from the bottom of an open tank with 15 ft of liquid with a specific gravity of 1.1?

  • 1.5 psi (correct)
  • 2.5 psi
  • 1.2 psi
  • 4.7 psi
  • How much head pressure is exerted by 7 ft of a liquid with a specific gravity of 1.5 in an open tank?

    <p>4.50 psi</p> Signup and view all the answers

    How much total pressure is produced by 15 ft of liquid with a specific gravity of 0.95 and 10 psi of nitrogen pressure in a closed vessel?

    <p>16.25 psi</p> Signup and view all the answers

    What does the pressure gauge read if it is located 2 ft from the bottom of an open tank containing 8 ft of liquid with a specific gravity of 1.3?

    <p>3.30 psi</p> Signup and view all the answers

    How much head pressure is exerted by 20 ft of liquid with a specific gravity of 0.7 in an open tank?

    <p>6.65 psi</p> Signup and view all the answers

    How much head pressure is exerted by 5 ft of liquid with a specific gravity of 1.0 in an open tank?

    <p>2.10 psi</p> Signup and view all the answers

    What is the pressure exerted by 8 ft of liquid with a specific gravity of 1.2 and 6 psi of nitrogen pressure in a closed vessel?

    <p>10.16 psi</p> Signup and view all the answers

    How much head pressure is exerted by 4 ft of liquid with a specific gravity of 1.4 in an open tank?

    <p>2.40 psi</p> Signup and view all the answers

    Study Notes

    Head Pressure in Open Tank (Height x Specific Gravity)

    • Head pressure is the pressure exerted by a column of liquid due to its height and specific gravity.
    • Formula for head pressure = Height x Specific Gravity
    • Example: 10 ft of liquid with specific gravity = 1.3 exerts a head pressure of 130 ft.

    Head Pressure in Closed Vessel with Added Pressure

    • Total pressure in a closed vessel is the sum of head pressure and added pressure.
    • Added pressure is typically from a gas like nitrogen.
    • Example: 12 ft of liquid with specific gravity = 0.9 and 7 psi of nitrogen pressure results in a total pressure of 13.35 psi.

    Pressure Gauge in Open Tank

    • Pressure gauge reads the pressure at its location in the tank, not the total pressure.
    • The pressure gauge reading is the head pressure exerted by the liquid above the gauge.
    • Example: Gauge 3 ft from the bottom of a 9 ft tank with specific gravity = 1.0 has a reading of 2.7 psi.

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    Description

    This quiz explores concepts of head pressure in open tanks and closed vessels, including the influence of specific gravity and added pressures. It covers the calculation of pressure in different scenarios and the function of pressure gauges. Test your understanding of how fluid pressure is calculated!

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