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Heavy Equipment Operator Certification Exam Prep · Question

A typical excavation project requires moving 100 loose cubic metres (LCM) of material. If the soil has a swell factor of 25%, how many bank cubic metres (BCM) did the excavation originally comprise?

To find the Bank Cubic Metres (BCM) from Loose Cubic Metres (LCM) given a swell factor, use the formula: BCM = LCM / (1 + Swell Factor). So, BCM = 100 LCM / (1

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Question: A typical excavation project requires moving 100 loose cubic metres (LCM) of material. If the soil has a swell factor of 25%, how many bank cubic metres (BCM) did the excavation originally comprise?

Answer options: ✅ 80 BCM

  • 75 BCM
  • 100 BCM
  • 125 BCM

Correct answer: 80 BCM

Explanation: To find the Bank Cubic Metres (BCM) from Loose Cubic Metres (LCM) given a swell factor, use the formula: BCM = LCM / (1 + Swell Factor). So, BCM = 100 LCM / (1 + 0.25) = 100 / 1.25 = 80 BCM. This reflects the original volume of material before excavation.

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