Level 6 - Graphic Literacy


You are a road contractor and you have analyzed a soil that you want to use for road fill. Your analysis shows that the soil contains 15% sand, 65% silt, and 20% clay. You need to know what the shrink-swell potential is for the soil because it will affect the durability of the road.

Why this is a Level 6 item:
  • The problem is based on very complicated, detailed graphics in a challenging format.
  • Examinees must notice the connections between graphics.
  • Examinees must apply the information to a specific situation.
  • Examinees must use the information to draw conclusions.
  1. 4.

    Based on the diagram and table shown, what is the shrink-swell potential at a 30-inch depth for this soil?

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