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 (B)</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 (C)</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 (C)</p> Signup and view all the answers

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

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

When are rising stems preferred in valves?

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

What is a common application of globe valves?

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

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