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LA Landscape practice questions

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Question 1Project and Construction Administration

During construction administration on a landscape project, the landscape architect receives a contractor's request for information (RFI) about an unclear planting detail. What is the most appropriate first action?

  1. Forward the RFI to the owner and take no further action
  2. Issue a change order immediately to resolve the ambiguity
  3. Direct the contractor verbally to proceed with the most economical interpretation
  4. Review the RFI against the contract documents and respond in writing within the contractual time frame Correct answer.

Explanation

An RFI is a formal written query that the design professional must answer in writing so the response becomes part of the project record. The landscape architect first reviews the contract documents to determine whether the answer requires clarification or a change. Verbal direction and immediate change orders bypass the proper documentation chain.

Question 2Project and Construction Administration

Which document typically records the contractor's acknowledgment that materials delivered to the site conform to the approved submittals?

  1. Schedule of values
  2. Punch list
  3. Submittal transmittal Correct answer.
  4. Field order

Explanation

A submittal transmittal accompanies shop drawings and product data and records what was submitted, the review action taken, and any notation of conformance. It creates the paper trail linking approved submittals to delivered materials. A punch list, schedule of values, and field order serve different administrative purposes.

Question 3Project and Construction Administration

A landscape architect observes that installed irrigation lines are shallower than the depth specified in the contract documents. What is the correct construction administration step?

  1. Instruct the contractor to remove and replace the deficient work and document the observation in a field report Correct answer.
  2. Adjust the record drawings to show the shallower depth
  3. Accept the work because irrigation still functions
  4. Wait until the final inspection to note the deficiency

Explanation

Observed nonconforming work must be documented and the contractor directed to correct it to meet the contract documents. The field report preserves the observation and the direction given. Accepting or recording deficient work as built would waive the specification requirement improperly.

Question 4Project and Construction Administration

In a standard construction contract, what does substantial completion signify?

  1. All punch list items have been fully corrected
  2. The owner has made the final payment
  3. The work is sufficiently complete for its intended use, allowing the owner to occupy it Correct answer.
  4. The contractor's warranty period has expired

Explanation

Substantial completion marks the point at which the work is complete enough for the owner's intended use, even though minor items remain. It typically triggers the start of warranty periods, release of retainage in part, and the owner's acceptance of care and insurance responsibilities. Final payment and full punch list completion occur later.

Question 5Project and Construction Administration

Which party is generally responsible for maintaining site safety and providing safe access on a construction site?

  1. The general contractor Correct answer.
  2. The owner's landscape maintenance vendor
  3. The irrigation subconsultant
  4. The landscape architect

Explanation

Under standard contract forms, the contractor is responsible for construction means, methods, and site safety, including safe access and protection of the public. The landscape architect's role is observation for conformance, not supervision of safety. Other parties may have limited duties but do not carry the primary site safety obligation.

Question 6Project and Construction Administration

What is the primary purpose of a pre-construction conference?

  1. To clarify roles, procedures, schedules, and communication protocols before work begins Correct answer.
  2. To award the contract to the lowest bidder
  3. To finalize the landscape architect's design fee
  4. To conduct the final inspection of installed plant material

Explanation

A pre-construction conference brings the owner, contractor, and design professional together to establish communication lines, submittal and RFI procedures, schedules, and administrative expectations before mobilization. It reduces later disputes by aligning everyone on process. Fee negotiation, bid award, and final inspection occur at different stages.

Question 7Project and Construction Administration

A contractor submits a product substitution request for a plant species not named in the specifications. What should the landscape architect do before approving?

  1. Approve it automatically because substitutions save money
  2. Reject all substitutions as a matter of policy
  3. Evaluate whether the proposed species meets the design intent, including size, hardiness, and maintenance characteristics Correct answer.
  4. Defer the decision to the contractor's nursery supplier

Explanation

Substitution requests must be evaluated against the specified performance and design criteria rather than approved on cost alone. The landscape architect compares the proposed species on size, hardiness, form, and maintenance to confirm it serves the design intent. Automatic approval or blanket rejection both ignore the merits of the request.

Question 8Project and Construction Administration

A contractor's pay application shows 60 percent of the planting work complete, but field observation indicates only 40 percent is installed. What is the appropriate response?

  1. Certify the full 60 percent to avoid delaying the contractor
  2. Certify the amount supported by field observation and note the discrepancy to the contractor Correct answer.
  3. Ask the owner to decide the payment amount
  4. Refuse to certify any payment until all planting is complete

Explanation

The landscape architect certifies payment based on actual observed progress, not the contractor's stated figures. Certifying only the supported amount and documenting the discrepancy protects the owner and prompts correction. Withholding all payment or shifting the decision to the owner misapplies the certification role.

Question 9Project and Construction Administration

Which item belongs on a punch list at substantial completion?

  1. A future phase of the project not yet under contract
  2. A damaged tree that must be replaced before final acceptance Correct answer.
  3. The contractor's proposed change to the irrigation schedule
  4. A design revision requested by the owner for a later project

Explanation

A punch list identifies incomplete or defective work within the contracted scope that must be corrected before final completion. A damaged tree that fails to meet specification is a classic punch list item. Future phases, proposed changes, and separate projects fall outside the current contract scope.

Question 10Project and Construction Administration

During construction, the owner asks the landscape architect to direct the contractor to add a seating area not in the contract documents. What is the proper procedure?

  1. Verbally instruct the contractor to build it and settle cost later
  2. Add the seating area to the punch list
  3. Prepare a written change order or construction change directive describing the work and its cost and time impact Correct answer.
  4. Tell the contractor to submit an RFI for the seating area

Explanation

Added work outside the original scope must be authorized through a written change order or, when time is critical, a construction change directive with cost and time adjustments documented. This protects all parties and keeps the contract record accurate. Verbal direction and misusing RFIs or punch lists do not authorize scope changes.

Question 11Project and Construction Administration

What is the landscape architect's role regarding shop drawings submitted by the contractor?

  1. To review them for conformance with the design concept and contract documents Correct answer.
  2. To redraw them to the designer's preferred format
  3. To forward them directly to the owner without review
  4. To approve them as a guarantee that the contractor's means and methods are safe

Explanation

Shop drawing review confirms that the contractor's submittals are consistent with the design concept and the information in the contract documents. The review does not extend to approving the contractor's means, methods, or site safety. Redrawing or bypassing review exceeds or neglects the designer's defined role.

Question 12Project and Construction Administration

An owner wants to occupy a partially completed building whose landscape areas remain unfinished. How does this affect the project administration?

  1. Occupancy may constitute acceptance of the work and shift certain risks to the owner, so it should be documented Correct answer.
  2. The landscape architect must stop all field observation
  3. The contractor's warranty obligations end at occupancy
  4. The remaining work is automatically deleted from the contract

Explanation

When an owner occupies or uses completed portions of the work, that use may be treated as acceptance, transferring care, insurance, and damage risk for those areas to the owner. The event should be documented in writing to define responsibilities. It does not terminate warranties, halt observation, or delete remaining scope.

Question 13Project and Construction Administration

Which practice best supports defensible documentation of a site visit by the landscape architect?

  1. Documenting only deficiencies that lead to litigation
  2. Preparing dated written field reports describing observations, instructions, and participants Correct answer.
  3. Relying on memory and reporting observations only if asked
  4. Recording observations only in informal text messages to the contractor

Explanation

Contemporaneous, dated field reports capturing what was observed, what was directed, and who was present create the strongest defensible record. They support later claims, payment decisions, and dispute resolution. Memory, informal messages, and selective documentation leave gaps that weaken the record.

Question 14Project and Construction Administration

A contractor proposes to substitute a different paver unit that meets the specified compressive strength and dimensions but has a different color. How should the landscape architect evaluate it?

  1. Approve it because structural performance is met
  2. Reject it solely because it is a substitution
  3. Evaluate the color against the design intent and specified appearance criteria, and document the decision Correct answer.
  4. Approve it if the contractor offers a price reduction

Explanation

A substitution must satisfy all specified criteria, including appearance and design intent, not just structural performance. The designer evaluates the color against the specification and documents the reasoned decision. Approving on strength alone or rejecting solely because it is a substitution ignores the full criteria.

Question 15Project and Construction Administration

What is the function of a schedule of values in construction administration?

  1. It records the owner's design changes over time
  2. It documents the submittal review log
  3. It lists the contractor's proposed construction sequence
  4. It allocates the contract sum among work items to support progress payments Correct answer.

Explanation

The schedule of values breaks the contract sum into work items so that progress payments can be calculated against completed portions. It is the basis for the pay application review. It does not set the construction sequence, record design changes, or log submittals.

Question 16Project and Construction Administration

The landscape architect notices that a contractor is about to install sod over soil that was not prepared to the specified depth. What is the most effective immediate action?

  1. Approve the installation and require extra irrigation later
  2. Notify the contractor in writing before installation proceeds and document the observation Correct answer.
  3. Ask the owner to negotiate a credit for the shallow soil
  4. Wait for the final walkthrough to raise the issue

Explanation

Raising the deficiency in writing before the work is covered allows correction at the least cost and preserves the record. Timely notice is central to effective construction observation. Waiting, approving deficient work, or negotiating a credit does not enforce the specification.

Question 17Project and Construction Administration

Which statement correctly describes the landscape architect's authority to stop work on a construction site?

  1. The landscape architect's authority to stop work is limited and typically defined by the contract, often requiring notice to the owner Correct answer.
  2. The landscape architect has no role in reporting unsafe or nonconforming work
  3. The landscape architect may stop work whenever any deviation is suspected
  4. The landscape architect may stop work only with the contractor's written consent

Explanation

The authority to halt work is narrow and defined by the owner-designer agreement and general conditions, usually requiring prompt notice to the owner. The designer reports nonconforming or unsafe conditions but does not act as a site supervisor. Broad unilateral stop authority or total absence of a reporting role both misstate the position.

Question 18Project and Construction Administration

A contractor requests a time extension because of prolonged rain that delayed planting. What should the landscape architect evaluate?

  1. Whether the contractor purchased enough plants in advance
  2. Whether the contract provides for weather-related extensions and whether the delay affected the critical path Correct answer.
  3. Whether the owner would prefer to deny all extensions
  4. Whether the landscape architect's fee should be reduced

Explanation

Time extension requests are evaluated against the contract's provisions for excusable delay and whether the weather event actually delayed critical-path work. Documented causation is required. Plant procurement, owner preference, and design fees are unrelated to the entitlement analysis.

Question 19Project and Construction Administration

What distinguishes a construction change directive from a standard change order?

  1. A directive applies only to design changes requested by the owner
  2. A directive orders a change before cost and time are fully agreed, with adjustment determined later Correct answer.
  3. A directive eliminates the need for any written record
  4. A directive is issued verbally and never documented

Explanation

A construction change directive authorizes work to proceed before the cost and time impacts are settled, with the adjustment determined afterward through the contract's procedures. It is a written instrument used when time pressure requires immediate action. It is not verbal, limited to owner requests, or exempt from documentation.

Question 20Project and Construction Administration

A landscape architect is reviewing a contractor's claim that installed trees meet the specified caliper. The architect measures several trees and finds most are undersized. Which response best reflects proper administration?

  1. Reject the undersized trees, document the measurements, and require replacement with compliant stock Correct answer.
  2. Average the measurements across all trees and accept the result
  3. Defer to the nursery's certification of caliper
  4. Accept the trees because most are close to the required size

Explanation

Specified plant sizes are minimum requirements, and undersized stock does not conform even if close. The architect should document measurements and require replacement with compliant material. Averaging, accepting near-misses, or relying on the supplier's certification does not enforce the specification.

Question 21Project and Construction Administration

An owner-directive changes the design intent for a plaza's grading after the contractor has mobilized. What sequence best protects the project?

  1. Instruct the contractor verbally, then reconcile costs at closeout
  2. Document the owner's directive, evaluate cost and schedule impacts, issue a written change order, and update drawings Correct answer.
  3. Ask the contractor to absorb the cost as a goodwill gesture
  4. Record the change only on the as-built drawings

Explanation

A post-mobilization change requires a documented directive, an evaluation of cost and schedule effects, a written change order, and revised drawings so the contract reflects the new scope. Verbal instructions, shifting cost to the contractor, or recording only as-builts leaves the change unauthorized and disputed.

Question 22Project and Construction Administration

During closeout, the contractor submits warranties, as-built drawings, and operation and maintenance manuals. Why is this closeout documentation important to the owner?

  1. It transfers design liability to the contractor
  2. It replaces the need for a final inspection
  3. It supports future maintenance, warranty claims, and verification of installed conditions Correct answer.
  4. It eliminates the contractor's obligation to complete punch list items

Explanation

Closeout documents give the owner the information needed to maintain installed systems, pursue warranty claims, and understand as-built conditions. They complement rather than replace final inspection and do not shift design liability or cancel outstanding punch work. Proper closeout is a condition of final payment.

Question 23Project and Construction Administration

A landscape architect suspects that a contractor's proposed retaining wall detail deviates from the structural engineer's design. What is the most appropriate course of action?

  1. Refer the deviation to the structural engineer of record and withhold approval pending resolution Correct answer.
  2. Instruct the contractor to proceed and observe the result
  3. Approve the contractor's detail because the contractor is responsible for means and methods
  4. Revise the structural detail personally without consulting the engineer

Explanation

When a submittal appears to deviate from another discipline's sealed design, the landscape architect coordinates with the engineer of record rather than approving it. The engineer must confirm or revise the structural design. Approving unilaterally, proceeding on observation, or altering sealed structural work exceeds the landscape architect's authority.

Question 24Project and Construction Administration

A dispute arises over whether a contractor was directed to perform extra excavation. The landscape architect has only an undated handwritten note. What does this most likely undermine?

  1. The validity of the original contract documents
  2. The owner's obligation to pay the contract sum
  3. The contractor's license to perform work
  4. The defensibility of the designer's position due to weak contemporaneous documentation Correct answer.

Explanation

Disputes turn on the quality of the project record; an undated, informal note provides weak contemporaneous evidence compared with dated field reports and written directives. The contract sum, original documents, and licensing are unaffected by the note's quality. Strengthening documentation practices reduces this exposure.

Question 25Inventory and Analysis

A landscape architect is preparing a site inventory for a 40-acre parcel and needs a base map that shows property boundaries, easements, and recorded right-of-way widths. Which source is the most authoritative for these legal line locations?

  1. A USGS 7.5-minute topographic quadrangle
  2. A soil survey published by the Natural Resources Conservation Service
  3. A recent aerial photograph from a public GIS viewer
  4. The recorded plat and deed records held by the county recorder Correct answer.

Explanation

Legal boundary locations, easements, and dedicated right-of-way widths are established by recorded documents such as plats, deeds, and easement instruments, which the county recorder maintains. Topographic maps, aerial imagery, and soil surveys are useful inventory layers but are not authoritative for legal lines because they are generalized or photogrammetrically derived.

Question 26Inventory and Analysis

During a site visit, a designer measures slope between two stakes set 50 feet apart horizontally, with a 6-foot elevation difference. What is the slope expressed as a percentage?

  1. 12 percent Correct answer.
  2. 6 percent
  3. 8.3 percent
  4. 16.7 percent

Explanation

Percent slope equals rise divided by horizontal run, multiplied by 100. Here 6 feet divided by 50 feet equals 0.12, or 12 percent. Slope is computed on horizontal distance, not on the sloped distance along the ground.

Question 27Inventory and Analysis

A designer overlays a site plan on a topographic map and notices that a proposed walkway crosses several contour lines that are tightly spaced. What site condition does this pattern indicate?

  1. A depression or closed basin
  2. A steep slope requiring grade adjustment or a switchback Correct answer.
  3. A gently undulating area with minor grade change
  4. A flat terrace or bench with uniform elevation

Explanation

Contour spacing indicates steepness: closely spaced contours represent a rapid elevation change over a short horizontal distance, meaning a steep slope. Widely spaced contours indicate gentle grades, and closed loops indicate hills or depressions depending on hachures.

Question 28Inventory and Analysis

In a site analysis, which factor is best classified as a cultural or regulatory inventory item rather than a natural resource inventory item?

  1. Zoning district and permitted setbacks Correct answer.
  2. Prevailing wind direction
  3. Depth to bedrock
  4. Depth to seasonal high water table

Explanation

Cultural and regulatory inventories document human-made and legal conditions such as zoning, setbacks, easements, and land use. Water table depth, wind direction, and bedrock depth are physical or natural resource data collected from soils, climate, and geologic sources.

Question 29Inventory and Analysis

A designer needs to determine whether a site contains hydric soils that could indicate wetlands. Which inventory product is the primary reference for this determination?

  1. A construction cost estimating guide
  2. The county soil survey with its hydric soils list and mapping units Correct answer.
  3. The local street tree planting list
  4. A site furniture and lighting catalog

Explanation

Soil surveys published by the NRCS identify soil mapping units and flag hydric soils, which are one of the three wetland indicators used in delineation. Catalogs, planting lists, and cost guides do not document soil drainage class or hydric status.

Question 30Inventory and Analysis

A designer is analyzing solar access for a proposed plaza and wants to know the sun's altitude and azimuth at noon on the winter solstice. Which tool is specifically designed for this analysis?

  1. A soil permeability test
  2. A traffic volume count
  3. A sun path diagram for the site latitude Correct answer.
  4. A sieve analysis of aggregate

Explanation

Sun path diagrams plot solar altitude and azimuth by hour and season for a given latitude, allowing designers to evaluate shading and solar access. The other tools measure soil, aggregate, or traffic conditions and have no bearing on solar geometry.

Question 31Inventory and Analysis

A landscape architect is assembling a site analysis graphic for a client presentation. Which content is most appropriate to include in the analysis phase rather than the inventory phase?

  1. A photographic record of existing paving conditions
  2. A diagram of opportunities and constraints derived from site data Correct answer.
  3. A table of surveyed property corner coordinates
  4. A list of existing tree species and caliper sizes

Explanation

Inventory records existing conditions, while analysis interprets those data to identify opportunities, constraints, and relationships that inform design. Tree lists, survey coordinates, and photo records are raw inventory data rather than interpretation.

Question 32Inventory and Analysis

A designer is evaluating a site for a stormwater infiltration basin and needs to estimate how quickly water moves through the subsoil. Which field or laboratory measure is most directly relevant?

  1. Saturated hydraulic conductivity Correct answer.
  2. Cation exchange capacity
  3. Soil color value
  4. Soil pH

Explanation

Saturated hydraulic conductivity quantifies the rate at which water moves through saturated soil and is the key parameter for infiltration feasibility. pH, cation exchange capacity, and color describe chemical or morphological properties rather than flow rate.

Question 33Inventory and Analysis

A designer is preparing a site plan and must show the limits of a 100-year floodplain that crosses the property. Which mapping source is the standard regulatory reference for that boundary in the United States?

  1. The National Wetlands Inventory
  2. The USGS topographic quadrangle
  3. The county tax assessor parcel map
  4. The FEMA Flood Insurance Rate Map Correct answer.

Explanation

FEMA Flood Insurance Rate Maps delineate special flood hazard areas, including the 1-percent-annual-chance (100-year) floodplain, and are the regulatory basis for floodplain management. Topographic quads, wetland inventories, and parcel maps serve different purposes and do not establish regulatory flood boundaries.

Question 34Inventory and Analysis

A designer is calculating the area of an irregularly shaped planting bed on a site plan. Which method is most appropriate for accurately determining its area from a scaled drawing?

  1. Summing the perimeter lengths of the bed
  2. Multiplying the longest dimension by the widest dimension
  3. Estimating from the number of plants specified
  4. Using the digital area measurement tool on the scaled CAD or GIS drawing Correct answer.

Explanation

Digital area tools in CAD or GIS compute the enclosed area of a scaled polygon precisely, which is the reliable method for irregular shapes. Bounding-box multiplication overestimates irregular areas, perimeter is a length not an area, and plant counts do not measure area.

Question 35Inventory and Analysis

A site is described as having a seasonal high water table at 18 inches below grade. What is the most significant design implication of this condition?

  1. The site is well suited to conventional septic absorption fields
  2. Deep-rooted trees will establish without irrigation
  3. Subsurface infiltration and below-grade structures will be constrained Correct answer.
  4. Standard basement construction is feasible without waterproofing

Explanation

A shallow seasonal water table limits the vertical separation needed for infiltration and requires waterproofing or elevated construction for below-grade elements. Conventional septic systems, basements, and some plantings are affected precisely because the water table is close to the surface.

Question 36Inventory and Analysis

A designer is conducting a viewshed analysis for a ridge-top visitor center. Which approach best identifies the areas visible from the proposed building location?

  1. Counting existing trees by species
  2. Comparing soil mapping units across the property
  3. Measuring the depth to bedrock at the building pad
  4. Running a line-of-sight or viewshed operation on a digital elevation model Correct answer.

Explanation

Viewshed analysis uses a digital elevation model to compute which cells are visible from a viewpoint by testing line of sight across terrain. Soils, vegetation counts, and bedrock depth provide other inventory data but do not determine visibility.

Question 37Inventory and Analysis

A designer is evaluating pedestrian circulation on an existing campus and wants to document where people actually walk rather than where paths are paved. Which technique is most appropriate?

  1. Mapping desire lines and worn paths from field observation and aerial imagery Correct answer.
  2. Installing counters at building entrances only
  3. Reviewing the campus master plan's proposed path network
  4. Calculating the total paved area of the campus

Explanation

Desire lines are informal routes that users establish, often visible as worn paths across turf or pavement, and mapping them reveals actual circulation patterns. Entrance counters sample only part of the movement, master plans show intent rather than behavior, and paved area totals do not reveal routes.

Question 38Inventory and Analysis

A designer must inventory existing trees on a developed site and document each tree's location, species, and trunk diameter. Which convention correctly describes how trunk diameter is recorded for this purpose?

  1. Diameter at breast height, measured at 4.5 feet above grade Correct answer.
  2. Diameter at the root flare, measured at grade
  3. Diameter at the top of the crown
  4. Circumference measured at 10 feet above grade

Explanation

Tree diameter is conventionally recorded as diameter at breast height (DBH), measured at 4.5 feet above grade on the uphill side of the trunk. This standard allows consistent comparison among trees and is the basis for ordinances and valuation formulas.

Question 39Inventory and Analysis

During site analysis, a designer notes that a proposed building footprint falls within a mapped 100-year floodplain and also within a mapped wetland. Which conclusion is most defensible?

  1. The building can proceed because mapping is always approximate and non-binding
  2. The floodplain constraint can be ignored if the wetland is avoided
  3. Both mapped areas must be verified in the field and addressed with avoidance or permitting strategies Correct answer.
  4. The constraints are redundant because wetlands only occur outside floodplains

Explanation

Mapped floodplain and wetland boundaries are screening tools that require field verification and, where confirmed, avoidance or regulatory permitting. The two constraints are independent and can overlap, and neither can be dismissed because a map is generalized.

Question 40Inventory and Analysis

A designer is preparing a slope analysis map from a digital elevation model and wants to classify the site into grade ranges for development suitability. Which cartographic approach best communicates the results?

  1. A single contour line drawn at the site boundary
  2. A point symbol at the site centroid
  3. A text table listing only the maximum slope
  4. A color-coded slope class map with a legend defining each range Correct answer.

Explanation

A slope class map with a defined legend communicates the spatial distribution of grade ranges and supports suitability decisions. A single contour, a centroid symbol, or a maximum value does not show where each slope class occurs.

Question 41Inventory and Analysis

A designer is inventorying a site's microclimate and wants to identify locations that are likely to be frost pockets. Which site condition most strongly suggests a frost pocket?

  1. An exposed ridge top with unobstructed wind
  2. A low-lying area where cold air collects behind a barrier Correct answer.
  3. A paved plaza adjacent to a building wall
  4. A south-facing slope with full afternoon sun

Explanation

Cold air is denser than warm air and drains downslope, collecting in depressions and behind barriers, which produces frost pockets. Ridge tops, sunny south-facing slopes, and heat-retaining paved areas tend to be warmer and better drained of cold air.

Question 42Inventory and Analysis

A designer is evaluating an existing parking lot as part of a site inventory and needs to determine the number of accessible spaces required. Which information is essential to establish before applying the accessibility standard?

  1. The slope of the adjacent building roof
  2. The color of the parking surface markings
  3. The species of trees in the adjacent planting strip
  4. The total number of parking spaces provided in the lot Correct answer.

Explanation

Accessible parking requirements are tabulated by the total number of parking spaces in the lot, so that count must be established first. Surface color, adjacent tree species, and roof slope do not determine the number of accessible stalls.

Question 43Inventory and Analysis

A designer is comparing two potential building sites using a weighted suitability matrix. Site A scores 4 on slope (weight 0.5) and 2 on soils (weight 0.5); Site B scores 2 on slope and 4 on soils. Which statement correctly describes the comparison?

  1. The comparison depends on the assigned weights and scores, which must be justified Correct answer.
  2. Site B is superior because soils always outweigh slope
  3. The sites are equal under equal weighting, so the matrix reveals no difference
  4. Site A is superior because slope always outweighs soils

Explanation

A weighted suitability matrix produces results that depend entirely on the weights and scores assigned, so those values must be defensible and transparent. With equal weights the two sites tie numerically, which means the method cannot by itself establish superiority.

Question 44Inventory and Analysis

A designer is preparing an existing conditions plan and must show a utility easement that crosses the site. Which representation is most appropriate for communicating the easement on the plan?

  1. A dashed boundary with a label and recorded width dimension Correct answer.
  2. A solid building outline
  3. A planting symbol for a shrub mass
  4. A contour line at two-foot intervals

Explanation

Easements are typically shown as dashed or hatched boundary lines with a label and the recorded width, which conveys both location and legal extent. Building outlines, contours, and planting symbols represent other site features and do not communicate an easement.

Question 45Inventory and Analysis

A designer is analyzing a site for a proposed trail and must determine whether the route meets an accessibility grade requirement. The trail rises 8 feet over a 100-foot horizontal run. What is the percent grade, and how does it compare to a common 5 percent maximum running slope for accessible trails?

  1. 0.8 percent, which meets the 5 percent maximum
  2. 12.5 percent, which exceeds the 5 percent maximum
  3. 8 percent, which exceeds the 5 percent maximum Correct answer.
  4. 4 percent, which meets the 5 percent maximum

Explanation

Percent grade equals rise divided by run times 100, so 8 divided by 100 equals 8 percent. That exceeds a 5 percent maximum running slope, meaning the route would need regrading, a switchback, or a design variance.

Question 46Inventory and Analysis

A designer is evaluating whether a proposed parking area can drain to a bioretention facility. The site soils are classified as hydrologic soil group D with a measured infiltration rate near zero, and the seasonal water table is 12 inches below the facility bottom. Which conclusion is most defensible?

  1. Infiltration is not viable, so an underdrain or alternative treatment approach is needed Correct answer.
  2. The facility should be eliminated because no stormwater management is possible
  3. Infiltration is viable because group D soils drain quickly
  4. The facility will function as designed because the water table is below the surface

Explanation

Hydrologic soil group D has very low permeability, and a negligible measured rate combined with a shallow water table means infiltration cannot be relied upon. The appropriate response is an underdrain or a different practice, not abandonment of stormwater management altogether.

Question 47Inventory and Analysis

A designer is overlaying a parcel boundary from a survey in a state plane coordinate system onto a digital elevation model in a different coordinate system. The layers do not align. What is the most likely cause and appropriate correction?

  1. The contour interval is too coarse, so the DEM should be regenerated
  2. The layers use different units only, so a simple scale factor will fix alignment
  3. The survey is inaccurate, so the boundary should be redrawn by hand
  4. A coordinate system or datum mismatch exists, so both layers must be projected to a common reference Correct answer.

Explanation

Misalignment between spatial layers most often results from differing coordinate systems, projections, or datums, which must be reconciled by projecting both to a common reference. Unit conversion alone does not resolve datum shifts, and neither the survey nor the DEM is necessarily in error.

Question 48Inventory and Analysis

A designer is assessing solar exposure for a proposed courtyard and finds that an existing building casts a shadow across the courtyard at noon on December 21. Which conclusion best follows from this observation?

  1. The courtyard will receive direct sun at noon on December 21 only if the building is removed or the courtyard is relocated Correct answer.
  2. The shadow at winter noon proves the courtyard receives no sun at any time of year
  3. The shadow indicates the building faces north, so the courtyard is unaffected
  4. The courtyard will receive full sun at noon on June 21 because summer sun is lower

Explanation

Winter solstice noon represents the lowest sun altitude of the year, so a shadow at that time confirms the courtyard lacks direct noon sun in winter unless the obstruction is removed or the layout changes. It does not follow that summer noon is shadowed, nor that no sun occurs at other times.

Question 49Design and Construction Documentation

On a landscape grading plan, a spot elevation is written as 102.35 with a bar under the number. What does the bar indicate?

  1. The elevation is an existing grade to be removed
  2. The elevation is a benchmark of known datum
  3. The elevation marks a property corner
  4. The elevation is a proposed finished grade Correct answer.

Explanation

In landscape and civil grading conventions, an elevation shown with a bar beneath it denotes proposed finished grade, while an unbarred elevation denotes existing ground. This lets the contractor see how much cut or fill separates existing from proposed surfaces at that point.

Question 50Design and Construction Documentation

A planting plan calls out a 2-inch caliper shade tree. Which measurement does the caliper describe?

  1. Trunk diameter measured 6 inches above grade for trees up to 4-inch caliper Correct answer.
  2. Diameter of the root ball at the top of the ball
  3. Spread of the canopy at maturity
  4. Height of the tree from grade to the first branch

Explanation

Caliper is the trunk diameter of a nursery tree, and the standard American nursery convention measures it 6 inches above the soil line for trees up to and including 4-inch caliper. Larger trees are measured 12 inches above grade. Canopy spread and root ball size are separate specification items.