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Heavy Equipment Operator Certification Exam Prep · Question

When working on very soft or marshy ground, what additional measure should be considered for outrigger stability?

On very soft ground, using large, sturdy mats significantly increases the surface area for the outriggers, distributing the machine's weight more widely and pre

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Question: When working on very soft or marshy ground, what additional measure should be considered for outrigger stability?

Answer options:

  • Using longer outrigger cylinders to reach firmer ground. ✅ Placing large, sturdy mats (e.g., timber or composite mats) under the stabilizer pads to considerably increase the bearing surface.
  • Reducing hydraulic pressure to the outriggers to prevent them from sinking too deep.
  • Only extending the outriggers partially to keep more weight on the tires.

Correct answer: Placing large, sturdy mats (e.g., timber or composite mats) under the stabilizer pads to considerably increase the bearing surface.

Explanation: On very soft ground, using large, sturdy mats significantly increases the surface area for the outriggers, distributing the machine's weight more widely and preventing sinking, a critical practice for stability in challenging conditions as per IUOE 793 and general HEO safety.

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