Excavator Operator Certification Exam Prep · Question
An excavator operator is performing a bulk excavation for a new building foundation. The material is cohesive clay, and the total volume to be excavated is 500 cubic metres. The average dump truck capacity is 15 cubic metres (loose). With a loose factor of 1.25 for this clay, approximately how many truckloads will be required to remove the excavated material?
First, calculate the bulked volume: 500 m³ (bank volume) * 1.25 (loose factor) = 625 m³ (loose volume). Then, divide the loose volume by the truck capacity: 625
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Question: An excavator operator is performing a bulk excavation for a new building foundation. The material is cohesive clay, and the total volume to be excavated is 500 cubic metres. The average dump truck capacity is 15 cubic metres (loose). With a loose factor of 1.25 for this clay, approximately how many truckloads will be required to remove the excavated material?
Answer options:
- 33 truckloads ✅ 42 truckloads
- 26 truckloads
- 50 truckloads
Correct answer: 42 truckloads
Explanation: First, calculate the bulked volume: 500 m³ (bank volume) * 1.25 (loose factor) = 625 m³ (loose volume). Then, divide the loose volume by the truck capacity: 625 m³ / 15 m³/truck = 41.66, which rounds up to 42 truckloads. This ensures all material is accounted for.
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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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