Practice Quiz

Civil Engineering PE

Category - Soil and Materials

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What is the moisture content of a 1,000 gram (g) soil sample given the following value from its three-phase diagram?

Weight of solids: 890 g
  1. 11.0%
  2. 12.4%
  3. 89.0%
  4. Not enough information provided
Explanation
Answer: B - The moisture of a 1000 g soil sample with the given weight values is 12.4%.

Solution: Use the following equation to determine the moisture content, w

w = weight of water / weight of solids

= Ww / Ws

Given WT = 1,000 g and Ws = 890 g, and the weight of air = 0 g,

Ww = 110 g

Therefore s = 110 g / 890 g x 100

= 12.4%
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