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Flashing and Cavitation in Control Valves

9 Questions

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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?

Flashing (B) Signup and view all the answers

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

Sliding stem valve (C) Signup and view all the answers

What is a distinct feature of a gate valve?

Sealing surfaces between the gate and seats are planar (C) Signup and view all the answers

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

Globe valve (A) Signup and view all the answers

When are rising stems preferred in valves?

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

What is a common application of globe valves?

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