North Carolina General Contractors Practice Exam

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What is the minimum width and height for diversion dikes used for perimeter protection?

  1. 2 feet wide and 12 inches high

  2. 2 feet wide and 18 inches high

  3. 3 feet wide and 12 inches high

  4. 3 feet wide and 18 inches high

The correct answer is: 2 feet wide and 18 inches high

The minimum width and height for diversion dikes are critical for effective perimeter protection on construction sites. In this case, the correct choice specifies a dike that is 2 feet wide and 18 inches high. A width of 2 feet is generally considered sufficient to provide stability and prevent erosion from water flow, while a height of 18 inches typically ensures that the dike can effectively redirect water away from sensitive areas, preventing flooding or water accumulation. This specific combination of width and height strikes a balance between functionality and feasibility in construction, ensuring adequate water diversion without excessive resource use or space consumption. The threshold of 18 inches height is particularly important, as it allows for sufficient capacity to handle typical runoff scenarios, thus protecting the perimeter effectively.