Heavy Equipment Operator Certification Exam Prep · Question
A trench is 50 metres long, 1.2 metres wide, and 2.5 metres deep. If the soil's swell factor is 20%, what is the loose cubic volume (LCM) of material that needs to be hauled away?
First, calculate the bank cubic volume (BCM): 50 m * 1.2 m * 2.5 m = 150 BCM. Then, apply the swell factor: 150 BCM * (1 + 0.20) = 180 LCM. (Reference: IUOE 793
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Question: A trench is 50 metres long, 1.2 metres wide, and 2.5 metres deep. If the soil's swell factor is 20%, what is the loose cubic volume (LCM) of material that needs to be hauled away?
Answer options:
- 150 LCM ✅ 180 LCM
- 120 LCM
- 135 LCM
Correct answer: 180 LCM
Explanation: First, calculate the bank cubic volume (BCM): 50 m * 1.2 m * 2.5 m = 150 BCM. Then, apply the swell factor: 150 BCM * (1 + 0.20) = 180 LCM. (Reference: IUOE 793 Training Standards, Earthmoving Calculations).
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