Mercury Barometer Quiz
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Questions and Answers

What is the most common fluid used in traditional barometers and at the bedside for pressure measurements?

  • Oil
  • Alcohol
  • Mercury (correct)
  • Water
  • Which type of pressure measuring device is rapidly replacing traditional barometers and bedside pressure measurement tools?

  • Aneroid manometer
  • Mechanical pressure gauge
  • Electronic pressure gauge (correct)
  • Strain gauge
  • What type of pressure measuring device uses a flexible chamber and measures pressure electronically?

  • Aneroid manometer
  • Mercury barometer
  • Mechanical pressure gauge
  • Strain gauge (correct)
  • What is the purpose of the alarm system in the medical gas blender?

    <p>To provide an audible warning when either source gas fails or the pressure decreases below a specified value</p> Signup and view all the answers

    What happens if the air supply stops when the blender is set to deliver 60% oxygen?

    <p>The alarm will sound, and the system will start giving 100% oxygen to the patient</p> Signup and view all the answers

    What is the function of the pressure equalization valves in the gas blender?

    <p>To ensure that the gas pressures from the air and O2 inlets are equal before reaching the proportioning valve</p> Signup and view all the answers

    What is the recommended range for the inlet gas pressures in most blenders?

    <p>Within 10 – 20 psig of each other for the unit to operate properly</p> Signup and view all the answers

    What triggers an alarm in the context of gas failure?

    <p>Pressure Equalization valves not making the gasses close in pressure</p> Signup and view all the answers

    What determines the oxygen percentage leaving the blender?

    <p>Position of the proportioning valve within the mixing chamber</p> Signup and view all the answers

    What is a disadvantage of high flow oxygen blenders?

    <p>Accurate only at higher flows</p> Signup and view all the answers

    What is the advantage of oxygen blenders?

    <p>Provide precise oxygen concentrations</p> Signup and view all the answers

    In what scenario would a proportioning valve not be accurate?

    <p>Low flow and no internal leak</p> Signup and view all the answers

    What allows a high flow blender to be accurate at both low and high flows?

    <p>Internal leak (bleed)</p> Signup and view all the answers

    What is a disadvantage of oxygen blenders related to internal leaks?

    <p>Wastes more gas</p> Signup and view all the answers

    Why do blenders need a minimum amount of flow through the proportioning valve?

    <p>To create enough resistance by the proportioning valve</p> Signup and view all the answers

    What is a disadvantage of using low flow nasal cannulas?

    <p>Unstable and easily dislodged</p> Signup and view all the answers

    What is the FiO2 range for low flow nasal cannulas?

    <p>22%-40%</p> Signup and view all the answers

    Which type of low flow nasal cannula uses tubes that are big?

    <p>Pendant reservoir cannula</p> Signup and view all the answers

    What is a disadvantage of using low flow nasal cannulas?

    <p>They can cause dryness, bleeding, polyps, and deviated septum</p> Signup and view all the answers

    When are low flow nasal cannulas best used?

    <p>For patients in stable condition who need low FiO2</p> Signup and view all the answers

    What type of low flow nasal cannula is inserted into the vestibule of the nose?

    <p>Reservoir Cannula</p> Signup and view all the answers

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