Landscape Architect Registration Exam — Questions and Answers

Question 1: Which document establishes the official start of the contractor's time to complete the project?

Contract execution date
Notice of award
Notice to proceed (Correct answer)
Mobilization authorization

Correct answer: Notice to proceed

The notice to proceed (NTP) is the owner's written authorization for the contractor to begin work and typically marks day one of the contract duration.

Question 2: A final punch list is typically prepared and distributed at what project milestone?

After the final certificate for payment is issued
At or shortly before substantial completion (Correct answer)
When the contractor requests final inspection
After the contractor submits the schedule of values

Correct answer: At or shortly before substantial completion

The punch list is prepared at or near substantial completion and documents all remaining incomplete or defective items the contractor must correct before final payment.

Question 3: Which term describes the practice of grouping plants with similar water needs together to improve irrigation efficiency?

Hydrozoning (Correct answer)
Microclimate clustering
Water budgeting
Xeriscape zoning

Correct answer: Hydrozoning

Hydrozoning groups plants with similar water requirements into the same irrigation zones, reducing water waste and improving plant health.

Question 4: Which federal environmental law requires site assessment for contamination when land use is changing from industrial to public recreational use?

Resource Conservation and Recovery Act (RCRA)
Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) (Correct answer)
Clean Water Act (CWA)
National Environmental Policy Act (NEPA)

Correct answer: Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA)

CERCLA (Superfund) establishes liability and remediation requirements for contaminated sites, and Phase I/II Environmental Site Assessments are conducted under ASTM standards to identify CERCLA liability.

Question 5: What is the primary advantage of a wet pond over a dry extended detention pond for stormwater quality improvement?

Permanent pool provides continuous biological and sedimentation treatment (Correct answer)
Lower construction cost
Easier maintenance access
Greater peak flow attenuation

Correct answer: Permanent pool provides continuous biological and sedimentation treatment

A wet pond's permanent pool allows continuous biological uptake, sedimentation, and algal assimilation of nutrients between storm events, improving overall treatment.

Question 6: When preparing a master plan phasing strategy, which factor should take HIGHEST priority in sequencing construction phases?

Infrastructure installation before dependent amenities (Correct answer)
Minimizing public visibility of construction activity
Aesthetic appeal of early-phase improvements
Completing the largest phase first to demonstrate commitment

Correct answer: Infrastructure installation before dependent amenities

Infrastructure (utilities, grading, stormwater) must precede dependent amenities to avoid costly retrofitting and ensure systems function correctly.

Question 7: A landscape architect's planting plan calls for plants on 'center' spacing. Plants specified at 24" o.c. in a triangulated pattern will cover ground more efficiently than a grid pattern because:

Each plant covers approximately 15% more area due to offset rows (Correct answer)
Individual plants grow larger in triangulated arrangements
Triangulated spacing reduces the effective square footage per plant
Triangulated patterns require less irrigation coverage

Correct answer: Each plant covers approximately 15% more area due to offset rows

Triangulated (staggered) planting allows rows to offset, reducing gaps and allowing approximately 15% better ground coverage than a square grid at the same spacing.

Question 8: Which of the following documents, typically prepared by the landscape architect, provides detailed, written requirements for materials, equipment, construction systems, standards, and workmanship for the work and is a critical component of the contract documents?

Addenda
Shop Drawings
Specifications (Correct answer)
General Conditions

Correct answer: Specifications

Specifications are the written documents that complement the drawings. They describe the qualitative requirements for products, materials, and workmanship upon which the contract is based. General Conditions set forth the rights, responsibilities, and relationships of the parties. Addenda are modifications issued before the contract is signed. Shop drawings are prepared by the contractor or supplier to illustrate how specific components will be fabricated and installed.

Question 9: What is 'soil compaction' in landscape construction, and what is its primary negative effect on plants?

The reduction of soil pore space due to pressure, which limits water infiltration and root penetration (Correct answer)
The breakdown of soil aggregates due to repeated freeze-thaw cycles
The intentional mixing of compost into subsoil to improve nutrient levels
The natural settling of imported fill material over time after installation

Correct answer: The reduction of soil pore space due to pressure, which limits water infiltration and root penetration

Compaction reduces the macro-pore spaces between soil particles, limiting water infiltration, gas exchange, and root elongation, ultimately stunting plant growth and causing premature decline.

Question 10: Which LARE section evaluates a candidate's ability in project and construction administration?

Section C (Correct answer)
Section B
Section A
Section D

Correct answer: Section C

Section C of the LARE covers project and construction administration responsibilities.

Question 11: What is the key hydrologic advantage of green infrastructure over conventional gray infrastructure in urban areas?

Green infrastructure restores predevelopment hydrology by promoting infiltration and evapotranspiration (Correct answer)
Green infrastructure eliminates the need for any underground pipes
Green infrastructure increases peak discharge rates for safer conveyance
Green infrastructure is cheaper to install than all gray alternatives

Correct answer: Green infrastructure restores predevelopment hydrology by promoting infiltration and evapotranspiration

Green infrastructure mimics natural hydrology by returning water to the ground and atmosphere, reducing runoff volume and restoring watershed water balance.

Question 12: On a grading plan, a designer places a spot elevation of 102.5 at a low point in a parking lot. The nearest catch basin rim elevation is 102.0. This condition will result in:

Ponding water at the low point (Correct answer)
Overflow toward adjacent streets
Accelerated erosion
Proper drainage toward the catch basin

Correct answer: Ponding water at the low point

If the low point spot elevation (102.5) is higher than the catch basin rim (102.0), water cannot flow into the basin and will pond at the low point.

Question 13: During grading design, a landscape architect needs to direct stormwater away from a building foundation. What is the minimum recommended slope for paved surfaces adjacent to structures?

0.5%
5.0%
2.0% (Correct answer)
1.0%

Correct answer: 2.0%

A minimum 2% slope (2 inches per 10 feet) is required for paved surfaces adjacent to buildings to ensure positive drainage away from foundations.

Question 14: A landscape architect conducting a visual preference survey (VPS) as part of a community engagement process is primarily trying to:

Satisfy a regulatory requirement for public participation in NEPA review
Gauge community aesthetic values and preferences to inform design decisions (Correct answer)
Determine the monetary value of scenic resources in the project area
Identify which design team member has the best aesthetic judgment

Correct answer: Gauge community aesthetic values and preferences to inform design decisions

A visual preference survey systematically captures community aesthetic preferences to ensure design decisions reflect the values of the people who will use the space.

Question 15: During the construction of a public park, the contractor discovers that the specified bluestone pavers are unavailable due to a quarry strike. The contractor proposes substituting a different type of stone that is readily available. What is the first formal step the landscape architect should take in this situation?

Verbally approve the substitution with the contractor and document it in the next field report.
Request a formal Change Order proposal from the contractor detailing cost and schedule impacts. (Correct answer)
Reject the substitution outright as it deviates from the contract documents.
Issue a Construction Change Directive (CCD) to authorize the substitution immediately to avoid delays.

Correct answer: Request a formal Change Order proposal from the contractor detailing cost and schedule impacts.

A Change Order is the formal process for altering the construction contract. When a substitution is proposed, the landscape architect must first receive a formal proposal from the contractor that outlines any changes to the contract sum or schedule. This allows the owner to make an informed decision. A Construction Change Directive is used when agreement on terms isn't reached but the work must proceed. Verbal approval is not contractually binding, and outright rejection without evaluation is unprofessional.

Question 16: Which spatial concept describes a sequence of outdoor spaces that progressively reveal a destination, building anticipation?

Defensible space
Compression and release (Correct answer)
Figure-ground reversal
Borrowed scenery

Correct answer: Compression and release

Compression and release alternates narrow, enclosed spaces with expansive open areas to create dramatic arrival experiences and spatial hierarchy.

Question 17: In a bioretention cell, what is the primary purpose of the ponding zone?

To permanently retain water for irrigation
To provide temporary storage for incoming stormwater before it infiltrates (Correct answer)
To filter sediment using gravel beds
To accelerate peak discharge to the downstream system

Correct answer: To provide temporary storage for incoming stormwater before it infiltrates

The ponding zone temporarily stores stormwater above the growing media, allowing it to infiltrate gradually.

Question 18: A landscape architect needs to transition concentrated stormwater flow from a pipe outlet to gentle sheet flow across a stabilized vegetated slope to prevent erosion. Which stormwater management device is specifically designed for this purpose?

Infiltration Trench
Riprap Apron
Catch Basin
Level Spreader (Correct answer)

Correct answer: Level Spreader

A level spreader is a structure designed to take concentrated runoff and distribute it evenly as shallow sheet flow over a stabilized area. Its key feature is a perfectly level lip that ensures uniform discharge, reducing water velocity and preventing the erosion that would occur if the concentrated flow were discharged directly onto the slope.

Question 19: A landscape architect wants to include a requirement that the contractor provide a 2-year plant establishment warranty. In which section of the project manual should this requirement appear?

Division 01 — General Requirements (Summary of Work)
Division 32 — Exterior Improvements (Planting specification) (Correct answer)
Division 00 — Procurement and Contracting Requirements
Division 31 — Earthwork

Correct answer: Division 32 — Exterior Improvements (Planting specification)

Warranty requirements specific to planted material should be included in Division 32 planting specifications where they are linked to the specific material performance requirements and installation standards.

Question 20: In certain contracts, both parties consent to waive their right to file a lawsuit in the event of a disagreement. Instead, they engage an impartial third party to resolve any potential disagreements. This approach to settling conflicts is referred to as:

Nonbinding arbitration
Mediation
Civic disposition
Binding arbitration (Correct answer)

Correct answer: Binding arbitration

Binding arbitration is a form of alternative dispute resolution where parties agree to submit their dispute to an impartial third party (the arbitrator) for a decision. Crucially, both parties agree in advance to accept the arbitrator's decision as final and legally binding, waiving their right to pursue the matter in court. This method is often faster and less formal than traditional litigation.

Question 21: A landscape architect needs to calculate the earthwork balance for a site. Cut volume = 4,500 CY (bank measure), swell factor = 1.25, shrinkage factor = 0.90. How many cubic yards of compacted fill can this cut material produce?

3,600 CY
5,625 CY
5,000 CY
4,050 CY (Correct answer)

Correct answer: 4,050 CY

Compacted fill = bank volume × shrinkage factor = 4,500 × 0.90 = 4,050 CY; the swell factor applies to loose (hauled) volume, not the final compacted fill calculation.

Question 22: What is the purpose of a 'Notice to Proceed' in a construction contract?

It authorizes the contractor to begin mobilizing and construction work (Correct answer)
It documents the owner's acceptance of the completed work
It directs the contractor to correct defective work
It certifies that the contractor has met all bonding requirements

Correct answer: It authorizes the contractor to begin mobilizing and construction work

A Notice to Proceed is the formal owner directive that establishes the contract start date and authorizes the contractor to begin work.

Question 23: The circulation of users is secure and effective. Transit, parking, and site circulation. Function, accessibility, and safety.

Vehicular circulation property line setback from row
Circulation overview (Correct answer)
Creating solutions
Designing site access

Correct answer: Circulation overview

Circulation overview encompasses the comprehensive planning and design of how users, both vehicular and pedestrian, move through a site. It considers transit routes, parking layouts, and internal site pathways, with a focus on ensuring these movements are secure, effective, accessible, and safe. This broad term summarizes all aspects related to the flow and movement within a developed property.

Question 24: A landscape architect is designing a corporate campus and wants to create a comfortable outdoor plaza for employees. The site analysis reveals that the prevailing summer wind is from the southwest. To mitigate the wind's effect and create a sheltered space, which of the following is the most effective initial design strategy?

Use light-colored paving materials to reflect solar radiation.
Orient the plaza on the northeast side of the main building. (Correct answer)
Install a large, open-bottomed pergola in the center of the plaza.
Specify only low-growing groundcovers and herbaceous perennials.

Correct answer: Orient the plaza on the northeast side of the main building.

Site analysis includes understanding climatic factors like prevailing winds to inform design decisions that enhance human comfort. [2, 9] Placing the plaza on the leeward (northeast) side of a large building will use the structure itself as a windbreak, effectively sheltering the space from the southwesterly winds.

Question 25: What is the primary purpose of a flared end section (FES) at a culvert outlet?

To prevent sediment from entering the pipe
To reduce outlet velocity and minimize erosion at the discharge point (Correct answer)
To increase pipe capacity by reducing entrance loss
To allow fish passage through the culvert

Correct answer: To reduce outlet velocity and minimize erosion at the discharge point

A flared end section spreads and slows the discharge, reducing scour and erosion at the culvert outlet.

Question 26: What is 'allelopathy' and how does it affect planting design?

The release of chemicals by a plant that inhibit growth of nearby plants (Correct answer)
A method of spacing plants to reduce disease
The use of companion planting to attract pollinators
A soil amendment strategy that improves plant uptake

Correct answer: The release of chemicals by a plant that inhibit growth of nearby plants

Allelopathy occurs when a plant releases biochemicals that suppress the germination or growth of neighboring plants, which must be accounted for in planting plans.

Question 27: During construction administration, a contractor submits a Request for Information (RFI) about an apparent conflict between the civil drawings and the landscape drawings. What is the landscape architect's primary responsibility?

Direct the contractor to use the civil drawings as the controlling document
Issue a change order immediately to resolve the conflict
Review the conflict and issue a written response clarifying design intent (Correct answer)
Notify the owner and halt construction until the conflict is resolved

Correct answer: Review the conflict and issue a written response clarifying design intent

The landscape architect must review the RFI and issue a timely written response that resolves the conflict and clarifies design intent without necessarily requiring a change order.

Question 28: Which mapping method provides the most accurate existing tree canopy data for a large urban park site inventory?

Ground-level photo inventory
Aerial photography interpretation alone
LiDAR remote sensing combined with field verification (Correct answer)
Surveyed dripline measurements of trees over 6-inch DBH only

Correct answer: LiDAR remote sensing combined with field verification

LiDAR captures three-dimensional canopy structure with high precision, and field verification confirms species identity and health status.

Question 29: Section 404 of the Clean Water Act regulates the discharge of dredged or fill material into:

Municipal stormwater drainage systems
Ocean waters within the 200-mile exclusive economic zone
Groundwater aquifer recharge zones
Waters of the United States, including wetlands (Correct answer)

Correct answer: Waters of the United States, including wetlands

Section 404 requires a permit from the Army Corps of Engineers before discharging dredged or fill material into waters of the US, including adjacent wetlands.

Question 30: A landscape architect is leading a master planning effort for a waterfront revitalization project. To ensure the long-term success and community adoption of the project, which activity is most critical during the initial phases?

Creating photorealistic renderings of the final design. (Correct answer)
Selecting the primary paving material for the promenade.
Conducting a detailed soil analysis.
Developing a comprehensive stakeholder engagement strategy.

Correct answer: Creating photorealistic renderings of the final design.

Engaging stakeholders early and often is critical for the success of public projects. A comprehensive engagement strategy ensures that the needs and values of the community are incorporated into the design, which builds consensus, fosters a sense of ownership, and contributes to the long-term success and stewardship of the space. While technical analyses, visualizations, and material selections are important, they are more effective when informed by stakeholder input.

Question 31: A site inventory identifies a population of a state-listed threatened plant species. What is the landscape architect's most appropriate first response?

Remove the plants to avoid project delays
Proceed with design since state listing does not require federal review
Consult with the state natural heritage program and adjust site design to avoid impacts (Correct answer)
Relocate the plants to a nursery before grading begins

Correct answer: Consult with the state natural heritage program and adjust site design to avoid impacts

State natural heritage programs provide guidance on protected species, and the preferred design response is avoidance, not removal or relocation without agency consultation.

Question 32: Which soil amendment most effectively improves water retention in sandy soils?

Perlite
Organic compost (Correct answer)
Additional sand
Coarse gravel

Correct answer: Organic compost

Organic compost improves water retention in sandy soils by increasing organic matter content, which creates water-holding microsites and improves soil aggregation.

Question 33: A drainage basin study shows a time of concentration (Tc) of 45 minutes. If the design storm is increased from a 10-year to a 25-year event, how does the peak runoff rate change, assuming the same Tc?

It remains the same since Tc is unchanged
It depends solely on the curve number, not return period
It decreases because the longer return period spreads runoff
It increases because higher rainfall intensity produces more runoff (Correct answer)

Correct answer: It increases because higher rainfall intensity produces more runoff

A higher return-period storm delivers greater rainfall intensity, directly increasing the peak runoff rate calculated by the Rational Method (Q = CiA).

Question 34: A landscape architect is designing a public park trail intended to be an accessible route. According to ADA standards, what is the maximum running slope permitted for a path before it is classified as a ramp and requires more stringent features like handrails and level landings?

1:50 (2.0%)
1:16 (6.25%)
1:12 (8.33%)
1:20 (5.0%) (Correct answer)

Correct answer: 1:20 (5.0%)

According to the Americans with Disabilities Act (ADA) Standards for Accessible Design, any part of an accessible route with a running slope greater than 1:20 (5%) is considered a ramp. Ramps have stricter requirements, including a maximum slope of 1:12, handrails for rises over 6 inches, and level landings. A slope of 1:50 (2%) is the maximum allowable cross slope, not running slope.

Question 35: During a weekly site observation meeting for a corporate campus project, a project manager for the client asks the landscape architect to award the irrigation subcontract to a specific company owned by the project manager's cousin, despite it not being the lowest bidder. Which of the following is the MOST significant ethical issue at play?

Conflict of Interest (Correct answer)
Ensuring quality of materials
Upholding the project schedule
Maintaining the project budget

Correct answer: Conflict of Interest

This scenario presents a clear conflict of interest. The project manager's personal relationship is influencing a professional decision, which could compromise the project's integrity and fairness to other bidders. While budget, schedule, and quality are important, the primary ethical violation is the pressure to make a decision based on personal gain or relationships rather than the project's best interests.

Question 36: Which hydraulic concept describes the condition when stormwater runoff exceeds the infiltration capacity of the soil?

Capillary rise
Interflow
Baseflow contribution
Horton overland flow (Correct answer)

Correct answer: Horton overland flow

Horton overland flow occurs when rainfall intensity exceeds the soil's infiltration capacity, causing surface runoff.

Question 37: A landscape architect is designing a rain garden on a residential lot with silty clay soils. Which modification is most appropriate to improve performance?

Increase ponding depth to 24 inches
Reduce the drainage area to less than 50 square feet
Use a solid bottom liner to prevent seepage
Amend native soil with compost and sand to improve infiltration (Correct answer)

Correct answer: Amend native soil with compost and sand to improve infiltration

Amending heavy clay soils with compost and sand increases infiltration rates, which is essential for rain garden function.

Question 38: Which document type in a construction set provides written technical requirements for materials and workmanship?

Grading plan
Detail drawings
Site plan
Specifications (Correct answer)

Correct answer: Specifications

Specifications are written documents that describe the quality, standards, and installation requirements for materials and workmanship.

Question 39: An inventory map shows a 100-year floodplain boundary crossing a proposed park site. Which agency's regulations primarily govern development within this zone?

EPA Clean Water Act Section 402
U.S. Army Corps of Engineers Section 404
USFWS Endangered Species Act Section 7
FEMA National Flood Insurance Program (NFIP) (Correct answer)

Correct answer: FEMA National Flood Insurance Program (NFIP)

FEMA administers the NFIP and sets floodplain management regulations that local communities must adopt to participate in the program.

Question 40: A landscape architect is preparing an inventory of cultural resources on a rural site with potential archaeological sensitivity. The most appropriate baseline document to consult first is:

The State Historic Preservation Office (SHPO) files and archaeological predictive models (Correct answer)
The National Register of Historic Places listed properties database
The county tax assessor's parcel map
USGS topographic quadrangle maps only

Correct answer: The State Historic Preservation Office (SHPO) files and archaeological predictive models

SHPO files contain recorded sites, predictive models, and prior survey reports that establish baseline cultural resource sensitivity before any field investigation.

Question 41: In master plan circulation design, a 'desire line' analysis helps the designer understand:

Emergency vehicle turning radii
The informal paths users naturally take between destinations (Correct answer)
Optimal lane widths for bicycle facilities
Legal right-of-way widths required by zoning

Correct answer: The informal paths users naturally take between destinations

Desire lines reveal the most direct routes users informally create, informing formal pathway placement to reduce off-path travel and turf damage.

Question 42: An owner asks the landscape architect to add decorative boulders to the project without a formal change order. The landscape architect should:

Issue a field order and notify the owner of the cost later
Direct the contractor verbally and document the conversation
Add the boulders as a professional courtesy to the client
Refuse and insist on a properly executed change order (Correct answer)

Correct answer: Refuse and insist on a properly executed change order

All changes to the contract scope must be formalized through a written change order to protect all parties and maintain contract integrity.

Question 43: When locating a children's play area within a master plan, which adjacency is MOST important?

Proximity to parking for equipment delivery
Visual oversight from a parent seating or gathering area (Correct answer)
Location near stormwater detention to avoid flooding
Adjacency to the site's main entrance for visibility

Correct answer: Visual oversight from a parent seating or gathering area

Passive supervision ('eyes on the play area') from adult seating zones is a primary safety design principle for children's play spaces.

Question 44: A site analysis identifies a jurisdictional wetland in the southwest corner of a property, and the required 100-foot buffer would cover 40% of the buildable area. The best initial design strategy is to:

Reduce building footprints by 40% proportionally across the site
Fill the wetland under a Section 404 nationwide permit
Cluster development outside the buffer and use the buffer as open space amenity (Correct answer)
Apply for a variance to reduce the buffer to 50 feet

Correct answer: Cluster development outside the buffer and use the buffer as open space amenity

Clustering development outside the regulated buffer preserves the wetland's function, satisfies regulatory requirements, and converts the constraint into a site amenity.

Question 45: During a pre-bid conference, an owner's representative makes a verbal clarification about the project scope. How should this clarification be handled?

It must be confirmed in a written addendum issued to all bidders (Correct answer)
It is valid if documented in the meeting minutes only
It is binding if at least three bidders heard it
It applies only to bidders present at the conference

Correct answer: It must be confirmed in a written addendum issued to all bidders

All clarifications, regardless of how communicated, must be issued as a formal written addendum to all plan holders to be contractually binding.

Question 46: On a critical path method (CPM) schedule, which activity type has zero total float?

Near-critical path activities
Predecessor activities
Critical path activities (Correct answer)
Successor activities

Correct answer: Critical path activities

Activities on the critical path have zero total float, meaning any delay to them will directly delay the project completion date.

Question 47: When applying the principle of 'design with nature,' a landscape architect should first:

Select plant materials based on client preference
Consult with the marketing team on aesthetics
Prepare construction documents
Conduct thorough site analysis to understand natural systems, hydrology, and ecological patterns (Correct answer)

Correct answer: Conduct thorough site analysis to understand natural systems, hydrology, and ecological patterns

Ian McHarg's 'design with nature' approach begins with deep site analysis to reveal natural systems that should guide design decisions.

Question 48: During earthwork, a contractor encounters soil with a swell factor of 25%. If 800 bank cubic yards (BCY) are excavated, how many loose cubic yards (LCY) must be hauled away?

800 LCY
1,200 LCY
640 LCY
1,000 LCY (Correct answer)

Correct answer: 1,000 LCY

Loose volume = Bank volume × (1 + swell factor) = 800 × 1.25 = 1,000 LCY; swell increases volume when soil is excavated and loosened.

Question 49: What does 'angle of repose' mean in cut-and-fill grading design?

The maximum grade of a wheelchair-accessible ramp under ADA standards
The slope of a drainage swale required to prevent sediment deposition
The maximum safe steepness of a slope for a given soil type before it fails (Correct answer)
The angle at which a retaining wall must be battered to prevent overturning

Correct answer: The maximum safe steepness of a slope for a given soil type before it fails

The angle of repose is the steepest angle at which a granular or cohesive soil will remain stable without sliding, and varies by soil type, moisture content, and cohesion.

Question 50: A landscape architect is conducting an inventory of a site with a seasonal high water table at 18 inches below grade. Which design approach is most appropriate for planting trees in this area?

Use standard pit planting at grade
Select only shallow-rooted annuals
Plant in raised berms or mounds (Correct answer)
Install subsurface French drains only

Correct answer: Plant in raised berms or mounds

Planting in raised berms or mounds elevates the root zone above the seasonal high water table, preventing root suffocation in saturated soils.

Question 51: Which of the following best describes the 'urban heat island' (UHI) effect that landscape architects can help mitigate?

Higher ground-level ozone concentrations in downtown areas during summer
Increased UV radiation in cities due to reduced tree canopy cover
The tendency for urban buildings to block cooling ocean breezes
Elevated temperatures in urbanized areas caused by heat-absorbing surfaces and reduced vegetation (Correct answer)

Correct answer: Elevated temperatures in urbanized areas caused by heat-absorbing surfaces and reduced vegetation

The UHI effect is caused by heat-absorbing dark surfaces (pavement, roofs) and reduced evapotranspiration from vegetation, creating measurably higher urban temperatures.

Question 52: Under LARE scoring, what is a 'vignette' problem in the graphic sections?

A short written response question
A multiple-choice exhibit question with site photos
A scaled drawing task completed within a test software environment (Correct answer)
A calculation problem using provided data tables

Correct answer: A scaled drawing task completed within a test software environment

Vignettes are graphic design tasks where candidates use computerized drawing tools to complete a scaled site design within the LARE testing software.

Question 53: In a shadow study for a proposed pergola structure, which sun angle data is most important for determining shading on the winter solstice in a mid-latitude US city?

Solar altitude angle at solar noon on December 21 (Correct answer)
Sunrise and sunset azimuth angles in June
Annual average solar altitude angle
Equinox solar altitude at 9 AM and 3 PM

Correct answer: Solar altitude angle at solar noon on December 21

The winter solstice produces the lowest solar altitude angle at noon, determining the longest shadows and worst-case shading conditions for the design.

Question 54: Which stormwater BMP is specifically designed to treat road runoff containing high concentrations of heavy metals and petroleum hydrocarbons?

Dry extended detention basin
Bioretention cell with amended soil media (Correct answer)
Constructed wetland
Vegetated filter strip

Correct answer: Bioretention cell with amended soil media

Bioretention cells with engineered soil media are particularly effective at removing heavy metals and hydrocarbons through adsorption and biological uptake.

Question 55: The 100-year floodplain is defined as the area that has a flood inundation probability of:

100% chance of flooding over a 100-year period
Being flooded by storms greater than 100 inches of rainfall
Occurring once in every 100 years exactly
1% annual chance of being flooded in any given year (Correct answer)

Correct answer: 1% annual chance of being flooded in any given year

The 100-year floodplain has a 1% annual chance of flooding — it is a statistical probability, not a guaranteed 100-year recurrence interval.

Question 56: The SITES rating system for sustainable landscape development evaluates projects in which of the following categories?

Structural engineering and foundation design
Building energy efficiency and HVAC systems only
Site selection, water, soil and vegetation, materials, human health, and construction (Correct answer)
Transportation and parking management only

Correct answer: Site selection, water, soil and vegetation, materials, human health, and construction

SITES (Sustainable SITES Initiative) assesses landscapes across categories including water, soil, vegetation, human health, and materials to measure ecological performance.

Question 57: Which of the following elements is typically established and defined within a Master Plan but would be further detailed in later design phases?

The soil mix composition for perennial beds.
Specific bolt specifications for a custom bench.
The precise brand and model number of irrigation heads.
The overall spatial arrangement and location of key programmatic elements. (Correct answer)

Correct answer: The overall spatial arrangement and location of key programmatic elements.

A master plan provides a long-range vision and framework, defining the overall spatial organization, land use, circulation patterns, and locations of major programmatic elements like plazas, buildings, and open spaces. Specific construction details like bolt specifications, irrigation head models, and soil mix recipes are developed during the later design development and construction documentation phases.

Question 58: Which soil test result is most useful for determining the appropriate amendments before establishing a native plant restoration on a degraded urban site?

Atterberg limits
Percolation rate only
Proctor compaction test
Soil texture, pH, and organic matter content (Correct answer)

Correct answer: Soil texture, pH, and organic matter content

Texture, pH, and organic matter directly affect nutrient availability and plant establishment, guiding targeted amendments for restoration planting.

Question 59: Which data layer is most critical in a site suitability analysis for a trail that must remain passable year-round in a northern climate?

Prevailing wind direction during summer months
Aspect (slope orientation) to identify north-facing slopes prone to ice and shade (Correct answer)
Soil pH to determine surface treatment options
Canopy cover percentage for aesthetic quality

Correct answer: Aspect (slope orientation) to identify north-facing slopes prone to ice and shade

North-facing slopes in northern climates receive less solar radiation, retaining ice and snow longer, making aspect a key suitability variable for all-season trail design.

Question 60: When reviewing a contractor's application for payment, the landscape architect should verify which of the following before certifying payment?

That the contractor has received payment from the owner on prior applications
That the contractor's insurance premiums are current
That all project closeout documents have been submitted
That work claimed as completed has actually been installed per contract documents (Correct answer)

Correct answer: That work claimed as completed has actually been installed per contract documents

The landscape architect must visit the site and verify that the percentage of completion claimed accurately reflects work actually incorporated into the project.

Question 61: Which slope is considered the maximum practical limit for mowed lawn areas in landscape design?

50%
25% (Correct answer)
10%
33%

Correct answer: 25%

Slopes up to 25% (approximately 14 degrees or 1:4 ratio) are generally considered the maximum for mowed lawn areas to maintain safe and effective mowing operations.

Question 62: A Unified Soil Classification (USC) designation of 'CH' indicates which soil characteristic most relevant to site grading?

Organic silt with low bearing capacity
High-plasticity clay with significant shrink-swell potential (Correct answer)
Well-graded sand suitable for structural fill
Poorly graded gravel with high permeability

Correct answer: High-plasticity clay with significant shrink-swell potential

CH soils are fat clays with high plasticity index, making them prone to shrink-swell movement that can destabilize pavements and foundations.

Question 63: Which of the following correctly describes the prismatoid formula for earthwork volume calculation, and when is it preferred over the average end area method?

It averages three cross-sections and is preferred when end areas are nearly equal
It uses the middle cross-section area and is more accurate when end areas differ significantly (Correct answer)
It is used exclusively for rock excavation calculations
It calculates volume using only the largest end area and is faster to compute

Correct answer: It uses the middle cross-section area and is more accurate when end areas differ significantly

The prismatoid formula incorporates the middle cross-section area (V = L/6 × (A1 + 4Am + A2)) and is more accurate than average end area when end areas differ significantly.

Question 64: A bid bond is typically set at what percentage of the bid amount?

15–20%
1–2%
25–30%
5–10% (Correct answer)

Correct answer: 5–10%

Bid bonds are typically 5–10% of the bid amount, representing the difference between the low bid and next bid if the low bidder fails to execute the contract.

Question 65: A project specification requires 3-inch caliper balled-and-burlapped trees to have a minimum root ball diameter per ANSI Z60.1 standards. According to ANSI Z60.1, what is the minimum root ball diameter for a 3-inch caliper deciduous shade tree?

24 inches
32 inches (Correct answer)
28 inches
36 inches

Correct answer: 32 inches

ANSI Z60.1 specifies a minimum 32-inch root ball diameter for a 3-inch caliper balled-and-burlapped deciduous shade tree.

Question 66: A 'viewshed analysis' in master planning is used primarily to:

Map noise contours from transportation corridors
Calculate solar access for photovoltaic panel placement
Identify groundwater recharge zones under a site
Determine which areas are visually exposed to or screened from key observation points (Correct answer)

Correct answer: Determine which areas are visually exposed to or screened from key observation points

Viewshed analysis uses topography and GIS to map areas visible from specific vantage points, guiding siting decisions to protect scenic resources or screen unsightly uses.

Question 67: When evaluating a site's microclimate, which of the following factors would be most influential in creating a warm pocket that could support plants from a warmer hardiness zone?

An open field exposed to prevailing northwesterly winds.
A low-lying area where cold air settles.
A south-facing masonry wall that receives full sun. (Correct answer)
A dense stand of evergreen trees on the north side of the property.

Correct answer: A south-facing masonry wall that receives full sun.

A south-facing masonry wall absorbs solar radiation during the day and radiates the heat back at night, creating a warmer microclimate. [16, 12] This 'heat island' effect can protect less hardy plants. Low-lying areas are prone to frost pockets, north-side evergreen stands create shade and coolness, and exposure to winter winds increases cold stress. [16, 12]

Question 68: A landscape architect is calculating the Time of Concentration (Tc) for a small watershed as part of a drainage study. Which of the following design changes would result in a decrease in the Time of Concentration?

Increasing the length of the longest flow path by adding meanders to a channel.
Increasing the average slope of the overland flow path. (Correct answer)
Changing the primary ground cover from asphalt to a densely vegetated meadow.
Routing the flow through a small detention pond within the watershed.

Correct answer: Increasing the average slope of the overland flow path.

Time of Concentration (Tc) is the time it takes for runoff from the most hydraulically distant point of a watershed to reach the outlet. [6] Increasing the slope of the flow path makes the water travel faster, thus reducing the travel time and decreasing the Tc. [9] Changing to vegetation (increased roughness), lengthening the flow path, or adding detention would all slow the water down and *increase* the Tc.

Question 69: What does 'shrink-swell potential' refer to in expansive clay soils, and how does it affect site design?

The tendency of clay to erode under high-velocity runoff conditions
The rate at which clay soils consolidate under structural loads
The capacity of clay to retain nutrients for plant growth
Volume changes in clay soil as moisture content changes, causing foundation and pavement movement (Correct answer)

Correct answer: Volume changes in clay soil as moisture content changes, causing foundation and pavement movement

Expansive clays (high shrink-swell potential) expand when wet and shrink when dry, causing significant heaving and cracking of pavements, foundations, and retaining structures.

Question 70: According to USDA soil texture classification, which soil type has the highest percentage of sand particles?

Loam
Sandy loam (Correct answer)
Silt loam
Clay loam

Correct answer: Sandy loam

Sandy loam contains a high proportion of sand (typically 70–85% sand) with smaller amounts of silt and clay, resulting in fast drainage and low water retention.

Question 71: NEPA (National Environmental Policy Act) requires federal agencies to prepare an Environmental Impact Statement (EIS) when a project may:

Disturb more than one acre of land
Cost more than $1 million
Cross state boundaries
Significantly affect the quality of the human environment (Correct answer)

Correct answer: Significantly affect the quality of the human environment

NEPA requires an EIS for federal actions that may significantly affect the quality of the human environment.

Question 72: Which soil texture has the highest water infiltration rate?

Sand (Correct answer)
Silt
Sandy loam
Clay

Correct answer: Sand

Sand has the largest particle size and greatest pore space of all soil textures, resulting in the highest infiltration rate but the lowest water retention.

Question 73: The SITES v2 Rating System credits for 'Sustainable Sites' primarily evaluate:

Traffic level-of-service ratings
International building code compliance
LEED building envelope performance
Site ecology, water, soil, materials, and human health outcomes (Correct answer)

Correct answer: Site ecology, water, soil, materials, and human health outcomes

SITES v2 awards credits across site ecology, water, soil, materials, human health, and construction to certify sustainable landscape projects.

Question 74: A landscape architect is managing a project where the client has a strict, non-negotiable budget. The scope of work is well-defined and a complete set of construction documents has been prepared. Which type of construction contract would be most appropriate for this scenario?

Lump Sum (Fixed Price) Contract (Correct answer)
Unit Price Contract
Cost-Plus Contract
Time and Materials (T&M) Contract

Correct answer: Lump Sum (Fixed Price) Contract

A Lump Sum or Fixed Price contract is ideal for projects with a clearly defined scope and a strict budget. The contractor agrees to complete the project for a predetermined, fixed price, which provides cost certainty for the owner. Cost-Plus, T&M, and Unit Price contracts are better suited for projects where the scope is not as well-defined or is likely to change.

Question 75: A landscape architect must recommend a slope stabilization strategy for an eroding hillside in a wildfire-prone area. Which approach best balances stewardship and safety?

Grade the hillside flat to eliminate slope risk
Apply erosion control fabric without any vegetation
Revegetate with fire-resistant native groundcovers and shrubs that establish deep root systems (Correct answer)
Install concrete retaining walls across the entire slope

Correct answer: Revegetate with fire-resistant native groundcovers and shrubs that establish deep root systems

Native fire-resistant vegetation stabilizes soil through deep rooting, reduces wildfire risk, and supports local ecology better than hard engineering alone.

Question 76: Which of the following is a primary goal of Integrated Pest Management (IPM) in landscape stewardship?

Replacing all plant material annually to prevent pest cycles
Managing pests by combining biological, cultural, and chemical controls to minimize environmental impact (Correct answer)
Eliminating all insects from a site
Applying maximum pesticide concentrations on a schedule

Correct answer: Managing pests by combining biological, cultural, and chemical controls to minimize environmental impact

IPM uses multiple strategies to control pests at acceptable levels while reducing reliance on chemical pesticides and protecting ecosystems.

Question 77: Which USDA natural resources document is the primary reference landscape architects use to obtain detailed soil survey data for a project site in the US?

FEMA Flood Insurance Rate Map
EPA EnviroMapper Site Report
Web Soil Survey (WSS) published by NRCS (Correct answer)
USGS National Land Cover Database

Correct answer: Web Soil Survey (WSS) published by NRCS

The USDA-NRCS Web Soil Survey provides county-level soil maps, series descriptions, limitations, and engineering properties for all US project sites.

Question 78: What one of the following is necessary for a contract to be enforceable?

It must be witnessed by a notary public
There must be an exchange of a thing in return for a promise of another thing (Correct answer)
An escrow account must be used
Both parties must be at least 25 years of age

Correct answer: There must be an exchange of a thing in return for a promise of another thing

For a contract to be legally enforceable, there must be 'consideration,' which means an exchange of value between the parties. This exchange involves each party giving up something of legal value or incurring a legal detriment in return for a promise or action from the other party. Without this mutual exchange of promises or actions, a contract is generally not considered valid or enforceable.

Question 79: A substitution request from the contractor proposes an alternative irrigation system. The landscape architect should evaluate it based primarily on:

Whether the substitute is less expensive than the specified product
Whether the substitute is equal in quality, performance, and compatibility (Correct answer)
The manufacturer's representation that products are equivalent
The contractor's preference and installation experience

Correct answer: Whether the substitute is equal in quality, performance, and compatibility

Substitution approval requires the landscape architect to evaluate whether the proposed substitute meets all performance, quality, and compatibility requirements of the specified product.

Question 80: What is the primary significance of establishing the date of Substantial Completion for a construction project?

It is the date when the contractor's insurance coverage for the project is terminated.
It is the date when the owner can occupy or utilize the work for its intended purpose. (Correct answer)
It marks the official end of the contractor's liability for any defects in the work.
It signifies that the project is 100% complete and all punch list items have been resolved.

Correct answer: It is the date when the owner can occupy or utilize the work for its intended purpose.

Substantial Completion is a critical milestone defined in standard construction contracts (like the AIA G704) as the stage when the work is sufficiently complete for the owner to occupy and use it for its intended purpose. This date typically triggers the start of warranty periods, the transfer of responsibility for utilities and security to the owner, and allows for the release of most of the retainage, even though minor punch list items may still need to be addressed.

Landscape Architect Registration Exam

The LARE is a four-section exam administered by CLARB that assesses the knowledge, skills, and abilities required to practice landscape architecture competently without endangering public health, safety, or welfare. Candidates must pass all four sections to qualify for licensure.

Questions

105 min

Time Limit

65%

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These practice questions were written with AI tools. They are not real exam questions. Exam facts are checked against the official sources listed below. Not reviewed by a subject-matter expert. Editorial policy

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