Excavator Operator Certification Exam Prep · Question
What is a key characteristic of "Type A" soil that makes it relatively stable for trenching?
Type A soil, as defined in CSA Z275.4-12 and referenced by some provincial regulations, is characterized by its cohesive properties and high unconfined compress
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Question: What is a key characteristic of "Type A" soil that makes it relatively stable for trenching?
Answer options: ✅ It is cohesive, with significant unconfined compressive strength.
- It is highly granular and flows easily.
- It contains high levels of organic material.
- It is saturated with water and very soft.
Correct answer: It is cohesive, with significant unconfined compressive strength.
Explanation: Type A soil, as defined in CSA Z275.4-12 and referenced by some provincial regulations, is characterized by its cohesive properties and high unconfined compressive strength, making it the most stable soil type for excavation, allowing for steeper slopes or less extensive shoring.
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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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