Excavator Operator Certification Exam Prep · Question
An excavator operator is planning a lift using a 20-tonne excavator. The lift chart indicates a maximum lift capacity of 4,500 kg at a 6-metre load radius and 3,000 kg at a 9-metre load radius. The load to be lifted weighs 4,000 kg. What is the maximum load radius at which the operator can safely lift this load without exceeding the excavator's capacity?
Based on the provided lift chart data, the excavator can lift 4,500 kg at a 6-metre load radius. Since the load is 4,000 kg, lifting it at 6 metres is within ca
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Question: An excavator operator is planning a lift using a 20-tonne excavator. The lift chart indicates a maximum lift capacity of 4,500 kg at a 6-metre load radius and 3,000 kg at a 9-metre load radius. The load to be lifted weighs 4,000 kg. What is the maximum load radius at which the operator can safely lift this load without exceeding the excavator's capacity?
Answer options:
- Less than 6 metres ✅ At 6 metres exactly
- Between 6 and 9 metres
- More than 9 metres
Correct answer: At 6 metres exactly
Explanation: Based on the provided lift chart data, the excavator can lift 4,500 kg at a 6-metre load radius. Since the load is 4,000 kg, lifting it at 6 metres is within capacity. Increasing the load radius beyond 6 metres would reduce the capacity below 4,000 kg, making it unsafe.
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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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