Excavator Operator Certification Exam Prep · Question
A heavy excavator weighing 30,000 kg is being loaded onto a float trailer. The trailer manufacturer specifies a maximum ramp angle of 15 degrees. If the trailer deck height is 1.2 metres, what is the minimum ramp length required to maintain this angle?
Using trigonometry, the sine of the angle equals the opposite side (height) divided by the hypotenuse (length). So, sin(15°) = 1.2 m / length. Rearranging, leng
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Question: A heavy excavator weighing 30,000 kg is being loaded onto a float trailer. The trailer manufacturer specifies a maximum ramp angle of 15 degrees. If the trailer deck height is 1.2 metres, what is the minimum ramp length required to maintain this angle?
Answer options: ✅ Approximately 4.63 metres
- Approximately 2.89 metres
- Approximately 1.2 metres
- Approximately 0.3 metres
Correct answer: Approximately 4.63 metres
Explanation: Using trigonometry, the sine of the angle equals the opposite side (height) divided by the hypotenuse (length). So, sin(15°) = 1.2 m / length. Rearranging, length = 1.2 m / sin(15°) = 1.2 m / 0.2588 ≈ 4.63 metres. This ensures the ramp angle does not exceed the manufacturer's specification.
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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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