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Which outcome occurs when a hydraulic valve in a large construction excavator experiences spool binding?

A)Unintended actuator movement occurs
B)Increased thermal efficiency results
C)Pump noise significantly decreases
D)System pressure remains unchanged

💡 Explanation

Spool binding causes pressure imbalances, therefore resulting in unintended actuator movement rather than controlled motion, because the valve's metering capability is compromised. The **stiction** prevents precise flow regulation; thermal efficiency would decrease, and pump noise could increase if the valve sticks.

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