Landscape Architect Registration Examination (L.A.R.E.) — Questions and Answers

Question 1: Which LEED credit category most directly rewards landscape architects for reducing potable water use in irrigation?

Materials and Resources — Construction Waste Management
Water Efficiency — Outdoor Water Use Reduction (Correct answer)
Sustainable Sites — Rainwater Management
Energy and Atmosphere — Optimize Energy Performance

Correct answer: Water Efficiency — Outdoor Water Use Reduction

LEED's Water Efficiency category includes credits specifically for reducing or eliminating potable water used for landscape irrigation through native planting, efficient systems, or captured rainwater.

Question 2: What is the primary environmental benefit of specifying permeable pavement in a landscape design?

Providing a softer, more comfortable surface for pedestrian use
Completely eliminating the need for any subsurface drainage infrastructure
Significantly reducing construction costs over conventional paving
Allowing stormwater to infiltrate into the ground, reducing runoff and recharging groundwater (Correct answer)

Correct answer: Allowing stormwater to infiltrate into the ground, reducing runoff and recharging groundwater

Permeable pavement allows rainwater to pass through the surface into a stone reservoir base, reducing runoff volume, improving water quality through filtration, and recharging groundwater.

Question 3: What is allelopathy in the context of planting design?

The symbiotic relationship between plants and mycorrhizal fungi
The chemical inhibition of growth in neighboring plants by compounds released from certain species (Correct answer)
The process of seed dispersal by wind
The attraction of pollinators through floral scent compounds

Correct answer: The chemical inhibition of growth in neighboring plants by compounds released from certain species

Allelopathy occurs when a plant releases biochemicals that inhibit germination or growth of other plants nearby, such as black walnut (Juglans nigra) producing juglone.

Question 4: Which of the following is a common cause for a contractor's bid to be deemed non-responsive and rejected during a formal bidding process?

The contractor included a list of qualified subcontractors.
The contractor attended the optional pre-bid meeting.
The bid price is significantly lower than all other bids.
The bid form was submitted after the specified deadline. (Correct answer)

Correct answer: The bid form was submitted after the specified deadline.

Bidding documents clearly state the deadline for bid submission. Failure to submit the bid by the specified date and time is a material irregularity and a primary reason for a bid to be rejected as non-responsive, regardless of its price or other merits.

Question 5: During the bidding phase for a public park project, a landscape architect issues an addendum. What is the primary purpose of this document?

To modify or clarify the bidding documents before the bid submission deadline. (Correct answer)
To approve a contractor's substitution request after the contract has been signed.
To formally award the construction contract to the lowest responsible bidder.
To negotiate the final contract price with the selected bidder.

Correct answer: To modify or clarify the bidding documents before the bid submission deadline.

Addenda are written or graphic instruments issued by the design professional prior to the execution of the contract which modify or interpret the bidding documents by additions, deletions, clarifications, or corrections. Their purpose is to ensure all bidders are basing their price on the same information.

Question 6: During a monthly site observation visit, the landscape architect notices that the contractor has installed site furnishings that do not match the approved submittals. What is the landscape architect's most appropriate initial action?

Prepare a change order to accept the non-conforming work.
Verbally instruct the contractor's crew to immediately remove the incorrect furnishings.
Issue a stop-work order for the entire project.
Document the non-conforming work in a field report and formally notify the contractor in writing. (Correct answer)

Correct answer: Document the non-conforming work in a field report and formally notify the contractor in writing.

The landscape architect's role during construction administration is to observe the work for general conformance with the contract documents. The proper procedure for addressing non-conforming work is to document it and notify the contractor through official written channels (e.g., a field report or separate letter). This creates a formal record and gives the contractor the opportunity to correct the work. Issuing a stop-work order is a severe step typically reserved for the owner or if there is an imminent safety risk. Directing the contractor's crew is not the landscape architect's role, and a change order would only be prepared if the owner decides to accept the non-conforming work, which is not the initial step.

Question 7: During the preparation of a bid for a complex landscape construction project, a contractor notices a significant discrepancy between the grading plan and the planting plan. What is the most appropriate first step for the contractor to take?

Submit the bid based only on the grading plan and plan to issue a change order later.
Make an assumption about the landscape architect's intent and adjust the bid price accordingly.
Withdraw from the bidding process to avoid the potential risk.
Formally submit a Request for Information (RFI) to the landscape architect for clarification. (Correct answer)

Correct answer: Formally submit a Request for Information (RFI) to the landscape architect for clarification.

When a contractor discovers a conflict or ambiguity in the bidding documents, the proper procedure is to submit a formal Request for Information (RFI) or a question to the design professional. This allows the landscape architect to issue a clarification or an addendum to all bidders, ensuring that all bids are based on the same, corrected information.

Question 8: A landscape architect is conducting a site inventory for a proposed park on a parcel of land with varied topography. Which of the following data is MOST critical to collect for accurately analyzing slope and drainage patterns?

A cultural history report of the site and surrounding area.
A record of average monthly precipitation and temperature.
A topographic survey with 2-foot contour intervals. (Correct answer)
A vegetation survey identifying all plant species.

Correct answer: A topographic survey with 2-foot contour intervals.

A topographic survey provides detailed information on the land's elevation, contours, and slopes. This data is fundamental for understanding how water will flow across the site (drainage patterns) and for calculating the steepness of the terrain (slope analysis), which are critical for proper grading, accessibility, and stormwater management design. While other data are important for a comprehensive site analysis, the topographic survey directly addresses slope and drainage.

Question 9: What does the 'urban heat island effect' describe in built environments?

The cooling effect provided by urban tree canopy cover
The elevated air and surface temperatures in urban areas compared to surrounding rural areas (Correct answer)
The reflection of sunlight from glass building facades into adjacent spaces
The localized warming of urban water bodies from thermal discharge

Correct answer: The elevated air and surface temperatures in urban areas compared to surrounding rural areas

The urban heat island effect occurs when built surfaces absorb and re-emit solar radiation, raising urban temperatures significantly above those of surrounding natural or rural areas.

Question 10: A path has a starting elevation of 102.5 feet. The path is 80 feet long and has a constant slope of 2.5%. What is the elevation at the end of the path?

104.5 feet
102.0 feet
105.0 feet
100.5 feet (Correct answer)

Correct answer: 100.5 feet

To calculate the change in elevation, multiply the length of the path by the slope percentage. Elevation change = 80 feet * 0.025 = 2.0 feet. Since the question does not specify if the path slopes up or down, but standard practice dictates paths drain away from starting points, we assume a downward slope. Therefore, the ending elevation is the starting elevation minus the change: 102.5 feet - 2.0 feet = 100.5 feet. If it were an upward slope, the answer would be 104.5 feet.

Question 11: Hydric soils serve as a primary indicator for identifying which regulated landscape feature during site analysis?

Steep erodible slopes
Brownfield contaminated sites
FEMA 100-year floodplains
Jurisdictional wetlands (Correct answer)

Correct answer: Jurisdictional wetlands

Hydric soils formed under prolonged waterlogged conditions exhibit mottling, gleying, and low chroma colors that indicate wetland conditions, and are one of the three required criteria for jurisdictional wetland delineation.

Question 12: A landscape architect is designing a stormwater management system for a commercial property. The primary goal is to manage peak runoff rates by temporarily holding water and releasing it slowly. The system should be dry between storm events. Which of the following is the most appropriate solution?

A detention basin (Correct answer)
A bioswale
A French drain
A retention basin

Correct answer: A detention basin

A detention basin is designed to temporarily store stormwater runoff and release it at a controlled rate, so it is typically dry between rain events. A retention basin, in contrast, maintains a permanent pool of water. A French drain primarily manages subsurface water, and a bioswale is a vegetated channel designed to slow and filter surface runoff, but a detention basin is specifically engineered for temporarily holding and slowly releasing large volumes of water to manage peak flow.

Question 13: A landscape architect is analyzing a site for a new residential development. The local zoning ordinance specifies a maximum building height of 35 feet and a minimum front yard setback of 20 feet. These regulations are best classified as which type of site factor?

Natural systems
Cultural context
Physical attributes
Legal constraints (Correct answer)

Correct answer: Legal constraints

Zoning ordinances, building codes, setbacks, easements, and other municipal regulations are legal constraints that dictate what can be built on a property. They are legally binding and must be adhered to in the design. Physical attributes refer to topography and geology, cultural context involves the surrounding community and history, and natural systems include hydrology and ecology.

Question 14: In ecological restoration practice, what does the term 'reference ecosystem' mean?

A curated database of endangered and threatened plant species lists
A previously restored site used for long-term performance comparison
A relatively undisturbed natural plant community used as a model for restoration goals (Correct answer)
A laboratory-cultivated plant community grown for restoration stock

Correct answer: A relatively undisturbed natural plant community used as a model for restoration goals

A reference ecosystem is a relatively intact, undisturbed natural community that serves as a benchmark for the target composition, structure, and ecological function of a restoration project.

Question 15: A CLARB exam scenario asks how to minimize light pollution from a new park lighting system. Which approach is most appropriate?

Use upward-facing spotlights on trees and structures
Use full-cutoff luminaires aimed downward with motion sensors and warm color temperature LEDs (Correct answer)
Maximize lumen output to ensure safety at all hours
Install the tallest poles possible to spread light widely

Correct answer: Use full-cutoff luminaires aimed downward with motion sensors and warm color temperature LEDs

Full-cutoff fixtures direct light only downward, eliminating sky glow and glare, while motion sensors reduce unnecessary nighttime illumination and dark-sky LEDs minimize ecological disruption.

Question 16: Which of the following is a key component of a program development document?

Project goals and client requirements (Correct answer)
Maintenance schedule
Material specifications
Final design renderings

Correct answer: Project goals and client requirements

Project goals and client requirements are a key component of a program development document. This section clearly articulates what the client aims to achieve, including desired functions, aesthetics, and any specific needs or constraints, serving as the guiding principles for the entire design process.

Question 17: Which of the following stormwater management techniques is a form of green infrastructure designed to slow, filter, and infiltrate surface runoff through a shallow, vegetated, and gently sloped channel?

A trench drain
An underground storage tank
A bioswale (Correct answer)
A dry well

Correct answer: A bioswale

A bioswale is a landscape element specifically designed as a shallow, vegetated channel to slow down water flow, promote infiltration, and filter pollutants from surface runoff. A dry well is an underground structure for infiltration, a trench drain is a linear surface drain, and an underground tank is for storage, not filtration and conveyance in a vegetated channel.

Question 18: A client wishes to address soggy lawn conditions caused by a high water table and subsurface water movement. They want an underground solution that will intercept and redirect this water away from the problem area. Which drainage system should be recommended?

Permeable pavers
A vegetated swale
A French drain (Correct answer)
A catch basin

Correct answer: A French drain

A French drain is specifically designed to manage subsurface water. It consists of a perforated pipe within a gravel-filled trench that collects groundwater and channels it away. A swale and permeable pavers manage surface water, while a catch basin is designed to collect surface runoff and direct it into a pipe system.

Question 19: Which plant characteristic is most important when designing for year-round interest in a temperate US climate?

Large leaf size for bold textural impact
Dense evergreen canopy for year-round screening
Rapid growth rate to quickly fill the space
Four-season ornamental qualities including bloom, foliage, fruit, and winter structure (Correct answer)

Correct answer: Four-season ornamental qualities including bloom, foliage, fruit, and winter structure

Plants offering spring flowers, summer foliage, fall color or fruit, and interesting bark or structure in winter provide continuous visual interest across all four seasons.

Question 20: During the design of a large parking lot, the landscape architect must incorporate a stormwater feature that not only manages runoff but also improves water quality and provides aesthetic and habitat benefits. The feature should maintain a permanent pool of water. What is the most suitable option?

An infiltration trench
A retention pond (Correct answer)
A detention pond
A channel drain

Correct answer: A retention pond

A retention pond, or wet pond, is designed to maintain a permanent pool of water. This permanent pool allows for significant pollutant removal through settling and biological processes and can be designed as an aesthetic amenity and wildlife habitat. A detention pond is dry between storms, an infiltration trench is primarily for subsurface infiltration, and a channel drain is for surface water collection.

Question 21: Which of the following elements is typically considered TOO detailed for inclusion in a schematic design package for a landscape project?

The specific species of a perennial to be used in a planting bed. (Correct answer)
Identification of major view corridors to be preserved or created.
General locations of primary and secondary pathways.
Approximate size and location of major programmatic areas like plazas and lawns.

Correct answer: The specific species of a perennial to be used in a planting bed.

Schematic design focuses on the big picture: the overall layout, scale, circulation, and relationships between spaces. Specific plant species, material choices, and detailed construction methods are determined later in the Design Development and Construction Documentation phases.

Question 22: A landscape architect is preparing construction documents for a project with a well-defined scope and a tight budget. The client desires cost certainty before construction begins. Which type of construction contract would be most appropriate for this situation?

Lump Sum (Stipulated Sum) Contract (Correct answer)
Time and Materials Contract
Cost-Plus Contract
Unit Price Contract

Correct answer: Lump Sum (Stipulated Sum) Contract

A Lump Sum (or Stipulated Sum/Fixed Price) contract is most appropriate for projects with a clearly defined scope. The contractor agrees to complete the project for a single, predetermined price, which provides the owner with cost certainty before work commences.

Question 23: What soil test result would most commonly prompt a landscape architect to recommend sulfur amendments prior to planting acid-loving species like azaleas?

Soil pH below 5.0, indicating highly acidic conditions
Soil pH above 6.5, indicating alkaline conditions unsuitable for acid-loving plants (Correct answer)
Low nitrogen levels in the soil
High phosphorus levels in the soil

Correct answer: Soil pH above 6.5, indicating alkaline conditions unsuitable for acid-loving plants

Azaleas and other ericaceous plants prefer pH 4.5–6.0, so elemental sulfur is added to lower soil pH when results show neutral to alkaline conditions.

Question 24: When inventorying a site's existing vegetation, which of the following characteristics is MOST important for determining which trees to preserve during the design and construction process?

The estimated age of the individual specimens.
The tree's proximity to the property line.
The seasonal color of the foliage.
The species, size, condition, and location. (Correct answer)

Correct answer: The species, size, condition, and location.

A thorough vegetation inventory must document the species (to understand its characteristics and value), size (caliper and height), health/condition (structural integrity, disease), and precise location of existing plants. This information allows the landscape architect to make informed decisions about which trees are healthy, significant, and realistically salvageable within the proposed design and construction limits.

Question 25: A client wants to include a decorative water feature in their project, but is unsure if the budget will allow for it. To manage costs effectively during bidding, the landscape architect should specify the water feature as a(n):

Contingency
Allowance
Change Order
Alternate (Correct answer)

Correct answer: Alternate

An alternate is a defined portion of the work that is priced separately by the bidders. This allows the owner to decide whether to include that portion of the work in the final contract based on the bids received and the overall budget, making it ideal for optional or 'wish list' items.

Question 26: What is typically included in a planting plan?

Types, locations, and quantities of plants (Correct answer)
Details of irrigation systems
Weather patterns
Soil composition tests

Correct answer: Types, locations, and quantities of plants

A planting plan is a detailed drawing that specifies the exact species, cultivars, sizes, and quantities of all plant materials to be used in a landscape project. It also indicates their precise placement on the site. This plan is essential for achieving the desired aesthetic, ecological, and functional goals of the design, guiding the contractor in plant procurement and installation.

Question 27: What tool is most commonly used to monitor the project timeline in construction management?

Budget spreadsheet
Gantt chart (Correct answer)
Site inspection checklist
CAD software

Correct answer: Gantt chart

The Gantt chart is the most commonly used tool to monitor the project timeline in construction management. It visually represents the project schedule, displaying the start and end dates of tasks, their dependencies, and overall progress, making it highly effective for tracking and managing construction schedules.

Question 28: Karst topography — characterized by sinkholes, caves, and internal drainage — develops primarily in areas underlain by which rock type?

Metamorphic schist and gneiss
Soluble carbonate rocks such as limestone and dolomite (Correct answer)
Volcanic basalt and obsidian
Granite and igneous rock

Correct answer: Soluble carbonate rocks such as limestone and dolomite

Karst landscapes form when slightly acidic groundwater dissolves soluble carbonate rocks (limestone, dolomite), creating caves, springs, and sinkholes over time.

Question 29: When grading a site to direct surface water away from a building foundation, what is the generally accepted minimum slope?

2% (1/4 inch per foot) (Correct answer)
5% (5/8 inch per foot)
1% (1/8 inch per foot)
0.5% (1/16 inch per foot)

Correct answer: 2% (1/4 inch per foot)

A minimum slope of 2% is the standard guideline to ensure positive drainage away from structures, preventing water from pooling near the foundation. This equates to a drop of at least 2 inches for every 10 feet of horizontal distance. While steeper slopes can be used, 2% is considered the minimum for effective surface water management in most conditions.

Question 30: What is the primary significance of the Certificate of Substantial Completion?

It confirms that all work, including all punch list items, is 100% complete.
It marks the date when the warranty period for the contractor's work begins. (Correct answer)
It terminates the landscape architect's responsibilities on the project.
It authorizes the contractor to submit the final application for payment.

Correct answer: It marks the date when the warranty period for the contractor's work begins.

Substantial Completion is the stage at which the work is sufficiently complete in accordance with the contract documents so that the owner can occupy or utilize the work for its intended use. This is a critical milestone because it typically marks the start of the contractor's warranty period and the transfer of responsibility for security, maintenance, and insurance from the contractor to the owner. The punch list of minor corrective items is usually generated at this stage, and final completion occurs after these items are addressed.

Question 31: Which of the three major rock types is formed through the cooling and solidification of magma or lava?

Diagenetic
Metamorphic
Igneous (Correct answer)
Sedimentary

Correct answer: Igneous

Igneous rocks (e.g., granite, basalt) form from the cooling of molten rock; they are typically hard, durable, and used extensively as landscape paving and wall materials.

Landscape Architect Registration Examination (L.A.R.E.)

The L.A.R.E. is the professional licensure exam for landscape architects administered by CLARB across four independent sections covering inventory and analysis, planning and design, construction documentation, and grading and drainage.

Questions

35 min

Time Limit

70%

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