Excavator Operator Certification Exam Prep · Question
When is shoring or sloping required for a trench in Type C soil?
In Canada, for most types of soil, and specifically for unstable Type C soil, shoring or sloping is generally required for trenches deeper than 1.2 metres (4 fe
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Question: When is shoring or sloping required for a trench in Type C soil?
Answer options: ✅ When the trench is deeper than 1.2 metres (4 feet).
- Only when the trench is over 2.4 metres (8 feet) deep.
- When the trench is deeper than 3.0 metres (10 feet).
- Only if heavy machinery is operating nearby.
Correct answer: When the trench is deeper than 1.2 metres (4 feet).
Explanation: In Canada, for most types of soil, and specifically for unstable Type C soil, shoring or sloping is generally required for trenches deeper than 1.2 metres (4 feet) to prevent collapse, as per regulations like WorkSafeBC G20.96 and Ontario Reg 213/91 (s. 235).
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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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