A heavy equipment operator is instructed to build a stockpile using a rear-dump articulated haul truck. What is the safest approach to dumping material on an existing pile?

Question: A heavy equipment operator is instructed to build a stockpile using a rear-dump articulated haul truck. What is the safest approach to dumping material on an existing pile?

Answer options: ✅ Approach the edge of the stockpile at a 90-degree angle, remain in the cab while dumping, and back away slowly.

• Approach the pile at an angle, rapidly dump the material, and then quickly drive away.
• Dump material from a distance, allowing it to roll down the face of the pile, and never drive onto the pile itself.
• Position the truck perpendicular to the pile's edge, get out of the cab to observe, and then dump the material.

Correct answer: Approach the edge of the stockpile at a 90-degree angle, remain in the cab while dumping, and back away slowly.

Explanation: When dumping on a stockpile, maintaining a perpendicular approach minimizes the risk of undermining the edge, and remaining in the cab provides protection if the ground shifts, as per general safe operating practices for haul trucks near drop-offs.