Heavy Equipment Operator Certification Exam Prep · Question
A granular base course for a road project requires 500 cubic metres (CM) of compacted material. If the material has a shrinkage factor of 15% from its loose state, how many loose cubic metres (LCM) must be ordered?
To determine the required Loose Cubic Metres (LCM) from Compacted Cubic Metres (CCM) with a shrinkage factor, use the formula: LCM = CCM / (1 - Shrinkage Factor
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Question: A granular base course for a road project requires 500 cubic metres (CM) of compacted material. If the material has a shrinkage factor of 15% from its loose state, how many loose cubic metres (LCM) must be ordered?
Answer options:
- 425 LCM
- 500 LCM
- 575 LCM ✅ ~588 LCM
Correct answer: ~588 LCM
Explanation: To determine the required Loose Cubic Metres (LCM) from Compacted Cubic Metres (CCM) with a shrinkage factor, use the formula: LCM = CCM / (1 - Shrinkage Factor). So, LCM = 500 CCM / (1 - 0.15) = 500 / 0.85 ≈ 588.24 LCM. Therefore, approximately 588 LCM should be ordered.
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