4. Inter-Relations

Try these first

1. 1.

   Define dry unit weight.

   Hint

   Think of it as weight without any liquid.

2. 2.

   What does moisture content represent?

   Hint

   It's a percentage!

3. 3.

   What is the formula to calculate dry unit weight?

   • Bulk Density × (1 + Moisture Content)
   • Bulk Density / (1 + Moisture Content)
   • Moist Unit Weight - Dry Unit Weight

   Hint

   Recall how moisture content affects the weight.

4. 4.

   True or False: Specific gravity is the weight of soil solids in comparison to water.

   • True
   • False

   Hint

   Think of it as a comparative measure.

5. 5.

   Given a soil sample with a specific gravity of 2.68 and a void ratio of 0.65. Calculate the dry unit weight when the bulk density is known to be 18 kN/m³.

   Hint

   Make sure to use the relationship of specific gravity and void ratio properly.

6. 6.

   A soil sample has a moisture content of 15%. If the moist unit weight is found to be 21 kN/m³, what is its dry unit weight?

   Hint

   Convert the percentage to decimal before applying.