Excavator Operator Certification Exam Prep · Question
An operator is planning to lift a concrete slab with an excavator. The lift chart specifies the lift capacity at various load radii and boom angles. Which factor listed on the lift chart usually takes precedence in determining the maximum allowable load?
When using a lift chart, the maximum allowable load for a specific configuration (load radius and boom angle) is dictated by the lowest capacity listed for that
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Question: An operator is planning to lift a concrete slab with an excavator. The lift chart specifies the lift capacity at various load radii and boom angles. Which factor listed on the lift chart usually takes precedence in determining the maximum allowable load?
Answer options:
- The ground pressure exerted by the excavator.
- The specific type of bucket attached. ✅ The lowest capacity for a given load radius and boom angle.
- The engine horsepower and hydraulic flow rate.
Correct answer: The lowest capacity for a given load radius and boom angle.
Explanation: When using a lift chart, the maximum allowable load for a specific configuration (load radius and boom angle) is dictated by the lowest capacity listed for that scenario. This ensures the lift is performed within both stability and structural limits of the machine.
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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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