Flashing and Cavitation in Control Valves
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Questions and Answers

Which process involves the collapse of bubbles at the speed of sound?

  • Cavitation (correct)
  • Boiling point
  • Control valve
  • Flashing

    • What happens when the pressure rises back above the boiling point in cavitation?

  • Flashing occurs
  • The liquid starts boiling
  • The bubbles collapse (correct)
  • The control valve opens

    • How many steps are involved in the cavitation process in control valves?

  • Two (correct)
  • One
  • Three
  • Four

    • What is the first step in the cavitation process?

    <p>Flashing</p> Signup and view all the answers

    Which type of valve uses a plunger type action to adjust the flow area?

    <p>Sliding stem valve</p> Signup and view all the answers

    What is a distinct feature of a gate valve?

    <p>Sealing surfaces between the gate and seats are planar</p> Signup and view all the answers

    Which type of valve is commonly used as a bypass around control valve?

    <p>Globe valve</p> Signup and view all the answers

    When are rising stems preferred in valves?

    <p>When a visual indication of valve position is needed</p> Signup and view all the answers

    What is a common application of globe valves?

    <p>On/off and throttling</p> Signup and view all the answers

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