Landscape Design Hardscape Design and Construction 2

Question 1

What does ADA compliance require for the cross-slope of an accessible pedestrian path?

Accepted Answer

Maximum 2 percent cross slope

Answer

ADA guidelines require that accessible paths have a maximum 2 percent cross slope perpendicular to direction of travel to prevent wheelchair drift.

Question 2

Which material is most appropriate for a permeable driveway to reduce stormwater runoff?

Accepted Answer

Permeable interlocking concrete pavers (PICP)

Answer

Permeable interlocking concrete pavers allow water to pass through joints into an aggregate base, reducing runoff and recharging groundwater.

Question 3

What is the primary function of a swale in landscape drainage design?

Accepted Answer

Convey surface water in a shallow, vegetated channel

Answer

A swale is a shallow, vegetated depression designed to convey stormwater runoff slowly across the landscape while filtering pollutants.

Question 4

What is frost heave and how does it affect hardscape construction?

Accepted Answer

Soil expansion from freezing water that displaces pavement

Answer

Frost heave occurs when water in the soil freezes and expands, pushing upward on hardscape surfaces causing cracking, displacement, and uneven surfaces.

Question 5

Which type of mortar joint is most appropriate for brick paving in a wet climate to prevent water infiltration?

Accepted Answer

Tooled concave joint

Answer

Tooled concave joints compress and seal the mortar, shedding water effectively and resisting moisture infiltration better than open or raked joints.

Landscape Design Practice Test

Landscape Design Practice Test

Landscape Design Hardscape Design and Construction 2