If the device shown in the illustration is...

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Question 1 of 205eccef9cbacbc34ba4d45922

If the device shown in the illustration is used to control the output of a variable displacement pump, and part "A" is displaced 50% from 'zero' stroke, which of the following statements will be correct? See illustration GS-0039.

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🔍 Key Concepts

• Relationship between pilot valve A (control spool) and servo piston B in a hydraulic follow‑up system • How the mechanical feedback link C tied to the tilting box control arm affects the final stroke of the pump • Difference between a momentary/transient response of the pump and its steady‑state discharge once the feedback has centered the pilot valve

💭 Think About

• When you move part A to a 50% position, what hydraulic signal goes to piston B, and how does piston B motion affect the tilting box control arm and feedback link C? • After the feedback link moves, where does it try to return the pilot valve A relative to the lands and ports feeding piston B? • Look at each choice and ask: is it describing a brief overshoot/transient condition, or the final stable condition of a closed‑loop servo control, and which best matches this type of follow‑up mechanism?

✅ Before You Answer

• Verify that this is a closed‑loop follow‑up control, not a simple open‑loop linkage. • Check whether any option incorrectly implies the pump would change stroke by itself back to neutral without a new control input. • Confirm that no option relies on a separate unloading valve or "lost motion" as the primary governing feature of pump output—focus on the servo feedback restoring the pilot valve to neutral at the commanded stroke.

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