Excavator Operator Certification Exam Prep · Question
A trench is being excavated in cohesive soil to a depth of 2.1 m. What is the minimum slope angle for the sides of the trench, without additional shoring or support, as per Canadian occupational health and safety regulations?
For trenches in cohesive soil up to 3.6 m deep, Canadian OHS regulations typically allow a maximum slope of 1 horizontal to 1 vertical (45 degrees) without addi
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Question: A trench is being excavated in cohesive soil to a depth of 2.1 m. What is the minimum slope angle for the sides of the trench, without additional shoring or support, as per Canadian occupational health and safety regulations?
Answer options: ✅ 1:1 (45 degrees)
- 3:4 (approximately 37 degrees)
- 1:2 (approximately 26.6 degrees)
- 1:3 (approximately 18.4 degrees)
Correct answer: 1:1 (45 degrees)
Explanation: For trenches in cohesive soil up to 3.6 m deep, Canadian OHS regulations typically allow a maximum slope of 1 horizontal to 1 vertical (45 degrees) without additional shoring. Slopes shallower than this, like 1:2 or 1:3, are for less stable soil types or greater depths.
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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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