Excavator Operator Certification Exam Prep · Question
What is the most accurate method for an excavator operator to check the final grade of a compacted aggregate base for a roadway, ensuring it meets specifications within ±2 cm?
For achieving precise final grades within tight tolerances like ±2 cm, employing a laser receiver mounted on the excavator, referencing a rotating laser, is the
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Question: What is the most accurate method for an excavator operator to check the final grade of a compacted aggregate base for a roadway, ensuring it meets specifications within ±2 cm?
Answer options:
- Using the bucket teeth to feel for high and low spots.
- Observing the grade stakes and visually estimating. ✅ Employing a laser receiver mounted on the excavator's stick or bucket, referencing a rotating laser.
- Driving over the area with the machine to compact it further and check for evenness.
Correct answer: Employing a laser receiver mounted on the excavator's stick or bucket, referencing a rotating laser.
Explanation: For achieving precise final grades within tight tolerances like ±2 cm, employing a laser receiver mounted on the excavator, referencing a rotating laser, is the most accurate and efficient method. This provides real-time, precise feedback to the operator. Relying on visual estimation, bucket feel, or driving over the area are not accurate enough for such strict specifications.
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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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