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← ScienceWhich risk increases when hydraulic cylinder's seals degrade in an excavator arm?
A)Reduced lifting capacity
B)Increased fuel consumption
C)Slower boom extension
D)Unintended arm drift✓
💡 Explanation
When cylinder seals degrade, internal leakage occurs because pressurized oil bypasses the piston, reducing effective force transfer and causing unintended movement. Therefore arm drift results, rather than reduced capacity, fuel consumption, or slower extension, which are associated with pump or valve problems.
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