Deck General USCG Question #658 (Set 20)

If a hydraulic pump on a winch accidentally stops while hoisting, the load will stay suspended because __________.

Official USCG Answer & Rule Citation

Correct Answer: Option C — a check valve will close and prevent reverse circulation

Hydraulic winch systems incorporate safety check valves and counterbalance valves that instantly lock fluid flow upon pressure loss or pump stoppage. This prevents reverse circulation of hydraulic fluid, ensuring the suspended load remains securely in position without dropping.

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