What is the primary hazard associated with cutting heavy, wet material with a grader, and how can it be mitigated through mouldboard adjustment?

Question: What is the primary hazard associated with cutting heavy, wet material with a grader, and how can it be mitigated through mouldboard adjustment?

Answer options: ✅ Material packing and stalling the machine; mitigate by decreasing mouldboard angle (less acute).

• Loss of traction; mitigate by increasing travel speed.
• Excessive wear on cutting edges; mitigate by using hardened steel blades.
• Material splashing onto the operator's cabin; mitigate by increasing blade height.

Correct answer: Material packing and stalling the machine; mitigate by decreasing mouldboard angle (less acute).

Explanation: When cutting heavy, wet material, material can pack up on the mouldboard, increasing resistance and potentially stalling the machine or causing loss of control. Mitigating this involves decreasing the mouldboard angle (making it less acute or 'laying back' the mouldboard slightly) and increasing the blade pitch (tilting the top of the blade forward). This allows the material to roll more freely off the mouldboard, preventing buildup and reducing drag, as covered in IUOE 793 training. It's often referred to as 'rolling the material' or 'material shedding efficiently'.