Excavator Operator Certification Exam Prep · Question
According to Canadian General Standards Board (CGSB) standards, what is the maximum depth a trench can be before a protective system (sloping, shoring, or trench box) is typically required, assuming unstable soil conditions?
While many OHS regulations specify 1.2m (4 feet) as a general threshold, in unstable or loose soil, protective systems are often required at shallower depths, t
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Question: According to Canadian General Standards Board (CGSB) standards, what is the maximum depth a trench can be before a protective system (sloping, shoring, or trench box) is typically required, assuming unstable soil conditions?
Answer options:
- 0.6 meters (2 feet) ✅ 1 meter (3.3 feet)
- 1.2 meters (4 feet)
- 1.5 meters (5 feet)
Correct answer: 1 meter (3.3 feet)
Explanation: While many OHS regulations specify 1.2m (4 feet) as a general threshold, in unstable or loose soil, protective systems are often required at shallower depths, typically 1 meter (3.3 feet) or even less, as specified by CGSB or provincial regulations.
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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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