Certified Floodplain Manager (CFM) Practice Exam

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What does 'Subgrade' mean in the context of FEMA 480?

  1. Above ground level

  2. At sea level

  3. Below ground level

  4. At flood level

The correct answer is: Below ground level

In the context of FEMA 480, 'Subgrade' refers to the level that is below ground, as indicated by option C. Option A, Above ground level, is incorrect because it is referring to a level above the ground and not below it. Option B, At sea level, is incorrect because it is referring to a level at the height of the sea, not below it. Option D, At flood level, is incorrect because while it does refer to a level below ground, it specifically denotes a level at the height of a flood, not any level below ground as 'Subgrade' does.

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