Civil Engineering MCQAE Level Civil Engineering
When 1 m³ of soil in bank condition is excavated, the volume in loose condition (swell factor ≈ 1.25 for ordinary soil) becomes:
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Choose the correct answer
A
0.80 m³
B
1.00 m³
C
1.25 m³
D
1.50 m³
Correct Answer
C. 1.25 m³
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Swell factor = Loose volume / Bank volume. For ordinary clay/soil, swell ≈ 20–30%; swell factor ≈ 1.20–1.30. So 1 m³ bank → 1.25 m³ loose. This matters for transport — trucks sized for loose measure. Shrinkage factor applies to compacted fill: 1 m³ bank → 0.80–0.90 m³ compacted.
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