Excavator Operator Certification Exam Prep · Question
An operator has secured a 10-tonne excavator using four 1/2-inch chain tie-downs, each rated for 8,800 kg (Working Load Limit). The securement points on the excavator are adequate. What is the approximate *total* aggregate Working Load Limit (WLL) provided by these tie-downs, and is it sufficient according to Canadian regulations?
The aggregate WLL is four times the WLL of a single tie-down, so 4 * 8,800 kg = 35,200 kg. Canadian regulations require the aggregate WLL of all tie-downs to be
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Question: An operator has secured a 10-tonne excavator using four 1/2-inch chain tie-downs, each rated for 8,800 kg (Working Load Limit). The securement points on the excavator are adequate. What is the approximate total aggregate Working Load Limit (WLL) provided by these tie-downs, and is it sufficient according to Canadian regulations?
Answer options:
- 17,600 kg; insufficient. ✅ 35,200 kg; sufficient.
- 8,800 kg; highly insufficient.
- 10,000 kg; barely sufficient.
Correct answer: 35,200 kg; sufficient.
Explanation: The aggregate WLL is four times the WLL of a single tie-down, so 4 * 8,800 kg = 35,200 kg. Canadian regulations require the aggregate WLL of all tie-downs to be at least 50% of the cargo's weight, which for a 10-tonne excavator is 5,000 kg. Therefore, 35,200 kg is more than sufficient.
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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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