Landscaping License Practice Test

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What is the minimum aggregate base thickness for streets when installing concrete pavers?

4 in
6 in
8 in
10 in

The correct answer is: 8 in

The correct answer indicates that an aggregate base thickness of 8 inches is required when installing concrete pavers for streets. This specification is based on ensuring sufficient stability, support, and load distribution for vehicular traffic. The aggregate base serves as a foundation that enhances drainage, minimizes deformation, and prevents settling, which are critical for maintaining the integrity and longevity of the paving system, particularly in areas expected to bear heavy loads. A thickness of 8 inches is generally considered to be the optimal depth to provide the necessary support for the weight of vehicles and to accommodate the associated stresses from traffic. This amount ensures that the pavers are set firmly, reducing the likelihood of movement and shifting over time, which could lead to an uneven surface and potential hazards. The other options suggest lesser depths, which may not offer the same level of support and longevity required for street applications. Insufficient thicknesses could lead to issues with settling, cracking, and other structural failures, which is why the 8-inch base is emphasized in installation practices for concrete pavers in streets.