Excavator Operator Certification Exam Prep · Question
A lift chart for an excavator specifies capacities 'over front' and '360-degree'. Which of the following statements accurately describes the 'over front' capacity?
The 'over front' capacity on a lift chart represents the maximum load an excavator can safely handle when the boom is positioned directly over the front or rear
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Question: A lift chart for an excavator specifies capacities 'over front' and '360-degree'. Which of the following statements accurately describes the 'over front' capacity?
Answer options: ✅ It represents the maximum lifting capacity when the boom is positioned directly over the tracks at either end of the machine.
- It is the capacity when the excavator is lifting with the boom perpendicular to the tracks.
- It refers to the maximum load the excavator can handle when slewing in a full circle.
- It applies only when the excavator is equipped with a specific lifting attachment.
Correct answer: It represents the maximum lifting capacity when the boom is positioned directly over the tracks at either end of the machine.
Explanation: The 'over front' capacity on a lift chart represents the maximum load an excavator can safely handle when the boom is positioned directly over the front or rear of the undercarriage, offering greater stability due to the longer base. The '360-degree' capacity applies when the load is lifted at any point around the machine's circumference.
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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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