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← TechnologyWhich 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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