Landscape Design Hardscape Design and Construction

Question 1

What is the standard recommended slope for a patio or walkway to ensure proper drainage away from a structure?

Accepted Answer

1 to 2 percent (1/8 to 1/4 inch per foot)

Answer

5 to 10 percent

Answer

0 percent (perfectly level)

Answer

15 percent

Question 2

Which base material is most commonly used beneath interlocking concrete pavers to provide stability?

Accepted Answer

Compacted crushed stone

Answer

Sand only

Answer

Poured concrete

Answer

Topsoil

Question 3

What is a 'setback' in the context of US hardscape design?

Accepted Answer

Required distance from a structure to the property line

Answer

The depth of a retaining wall footing

Answer

Amount of slope on a driveway

Answer

Distance between stepping stones

Question 4

What type of retaining wall requires geogrid reinforcement for walls exceeding a certain height?

Accepted Answer

Segmental retaining wall (SRW)

Answer

Dry-stacked stone wall

Answer

Poured concrete wall

Answer

Timber wall

Question 5

What is the purpose of a French drain in a landscape?

Accepted Answer

Redirect subsurface water away from an area

Answer

Provide irrigation to plant roots

Answer

Create a decorative water feature

Answer

Separate lawn from planting beds

Question 6

What is the recommended maximum riser height for exterior landscape steps to ensure safety and comfort?

Accepted Answer

7 inches

Answer

12 inches

Answer

4 inches

Answer

10 inches