When operating a wheel loader on a sloped aggregate stockpile, which of the following practices is most critical to prevent ground instability and potential collapse?

Question: When operating a wheel loader on a sloped aggregate stockpile, which of the following practices is most critical to prevent ground instability and potential collapse?

Answer options:

• Always operate perpendicular to the slope to maximize traction.
• Ensure the bucket is fully raised to improve visibility when backing up. ✅ Work from the base of the stockpile upwards, never cutting into the face from above.
• Maintain a minimum distance of 5 metres (16 feet) from the edge of the working face.

Correct answer: Work from the base of the stockpile upwards, never cutting into the face from above.

Explanation: Cutting into a stockpile face from above (benching) significantly increases the risk of collapse due to undermining. Working from the base upwards helps maintain the stability of the pile. Maintaining a safe distance from the edge is also good practice but does not directly prevent ground instability caused by operating methods on the pile itself.