Heavy Equipment Operator Certification Exam Prep · Question
Why is it important for a dozer operator to be aware of the 'angle of repose' of different materials?
The angle of repose is the steepest angle of descent or dip relative to the horizontal plane to which coarse granular material can be piled without slumping. Kn
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Question: Why is it important for a dozer operator to be aware of the 'angle of repose' of different materials?
Answer options:
- To determine the ideal engine RPM for pushing. ✅ To estimate the maximum stable slope that a pile of material can hold without slumping.
- To calculate the fuel consumption rate.
- To know the minimum width required for a haul road.
Correct answer: To estimate the maximum stable slope that a pile of material can hold without slumping.
Explanation: The angle of repose is the steepest angle of descent or dip relative to the horizontal plane to which coarse granular material can be piled without slumping. Knowing this prevents unstable spoil piles and protects workers and equipment.
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