Heavy Equipment Operator Certification Exam Prep · Question
A grader operator is cutting a ditch on a significant side slope. What is the most critical measure to prevent an overturn?
Keeping the blade low spreads the machine's weight and provides an anchor, effectively lowering the center of gravity and increasing the base of support. Sudden
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Question: A grader operator is cutting a ditch on a significant side slope. What is the most critical measure to prevent an overturn?
Answer options:
- Attaching a counterweight to the uphill side of the machine.
- Deploying the blade and scarifier on the uphill side. ✅ Keeping the blade positioned to lower the machine's centre of gravity and avoiding sudden movements.
- Increasing engine RPM to maintain consistent power while cutting.
Correct answer: Keeping the blade positioned to lower the machine's centre of gravity and avoiding sudden movements.
Explanation: Keeping the blade low spreads the machine's weight and provides an anchor, effectively lowering the center of gravity and increasing the base of support. Sudden movements are a primary cause of rollovers on slopes. Ontario Reg. 213/91 Section 96(5) states 'An operator shall not operate equipment in a manner that may make the equipment unstable'.
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