Excavator Operator Certification Exam Prep · Question
A 600 mm diameter concrete pipe section, 3.0 metres in length, needs to be lifted and placed into a trench. Assuming the density of concrete is approximately 2400 kg/m³, what is the approximate weight of this pipe section, requiring appropriate lifting capacity?
First, calculate the volume: V = \pi * r^2 * L = \pi * (0.3 m)^2 * 3.0 m \approx 0.848 m³. Then, Weight = Volume * Density = 0.848 m³ * 2400 kg/m³ = 2035 kg, wh
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Question: A 600 mm diameter concrete pipe section, 3.0 metres in length, needs to be lifted and placed into a trench. Assuming the density of concrete is approximately 2400 kg/m³, what is the approximate weight of this pipe section, requiring appropriate lifting capacity?
Answer options:
- Approximately 1.5 tonnes ✅ Approximately 2.0 tonnes
- Approximately 0.8 tonnes
- Approximately 3.5 tonnes
Correct answer: Approximately 2.0 tonnes
Explanation: First, calculate the volume: V = \pi * r^2 * L = \pi * (0.3 m)^2 * 3.0 m \approx 0.848 m³. Then, Weight = Volume * Density = 0.848 m³ * 2400 kg/m³ = 2035 kg, which is approximately 2.0 tonnes. This calculation is crucial for ensuring the excavator's lifting capacity is not exceeded, preventing structural failure or tip-overs.
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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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