Loader Operator Certification Exam Prep · Question
A loader operator is preparing to load a 15-tonne wheel loader onto a lowboy trailer with a deck height of 0.9 metres. The approach ramps have a length of 4.5 metres. What is the approximate approach angle of the ramps?
The approach angle can be calculated using trigonometry, specifically the inverse sine function (sin^-1). The angle is sin^-1(height/length), which is sin^-1(0.
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Question: A loader operator is preparing to load a 15-tonne wheel loader onto a lowboy trailer with a deck height of 0.9 metres. The approach ramps have a length of 4.5 metres. What is the approximate approach angle of the ramps?
Answer options:
- 11.3 degrees ✅ 15.8 degrees
- 20.5 degrees
- 25.1 degrees
Correct answer: 15.8 degrees
Explanation: The approach angle can be calculated using trigonometry, specifically the inverse sine function (sin^-1). The angle is sin^-1(height/length), which is sin^-1(0.9 m / 4.5 m) = sin^-1(0.2) = 11.53 degrees. 11.3 degrees is the closest option. An approach angle exceeding 15 degrees can be unsafe for heavy equipment.
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