Excavator Operator Certification Exam Prep · Question
An excavator operator is conducting a preliminary assessment of a site. What visual indicators might suggest the presence of Type 3 soil, requiring specific safety measures?
Type 3 soil is characterized by its lower cohesion compared to Type 1 or 2, often showing signs of cracking, previous disturbance, or being a soft to medium con
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Question: An excavator operator is conducting a preliminary assessment of a site. What visual indicators might suggest the presence of Type 3 soil, requiring specific safety measures?
Answer options:
- Solid, unweathered bedrock with no visible fractures.
- Densely compacted granular material showing excellent cohesion. ✅ Soil showing signs of cracking, fissuring, or previous disturbance, or soft/loose cohesive soil.
- Soil saturated with water, exhibiting signs of liquefaction.
Correct answer: Soil showing signs of cracking, fissuring, or previous disturbance, or soft/loose cohesive soil.
Explanation: Type 3 soil is characterized by its lower cohesion compared to Type 1 or 2, often showing signs of cracking, previous disturbance, or being a soft to medium consistency cohesive soil, requiring a flatter slope or shoring (O. Reg. 213/91, Part III).
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Question explanations
- During a final inspection of an excavator, prior to beginning work, an operator notices significant play in th
- An excavator operator is preparing to dig a trench in cohesive soil. To achieve maximum breakout force, what a
- Which control typically governs the arm (or dipper arm) movement for an excavator?
- What condition might require sloping or shoring of a trench less than 1.2 meters (4 feet) deep?
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