LLC Blueprint Reading & Interpretation 2 — Questions and Answers
Question 1: On a landscape lighting blueprint, what does a dashed line typically represent?
- A buried conduit or underground wire run (Correct answer)
- A surface-mounted fixture location
- A property boundary line
- A proposed future lighting zone
Correct answer: A buried conduit or underground wire run
Dashed lines on lighting plans conventionally indicate underground or concealed runs such as buried conduit or direct-burial cable.
Question 2: Which scale is most commonly used on residential landscape lighting site plans to balance detail with sheet size?
- 1" = 200'
- 1" = 10'
- 1" = 20' (Correct answer)
- 1" = 100'
Correct answer: 1" = 20'
A 1" = 20' scale is commonly chosen for residential sites because it shows enough detail while fitting a standard plan sheet.
Question 3: A lighting plan shows a circle with a cross inside it near a tree. What does this symbol most likely represent?
- A transformer location
- An uplight fixture aimed at the tree (Correct answer)
- A junction box splice point
- A photocell sensor
Correct answer: An uplight fixture aimed at the tree
A circle with a cross (or spike symbol) near plantings conventionally represents an uplight or spotlight fixture aimed at the tree or shrub.
Question 4: What information is typically found in the title block of a landscape lighting blueprint?
- Fixture wattage schedules only
- Project name, scale, revision date, and designer name (Correct answer)
- Wire gauge specifications for each run
- Soil type and trench depth requirements
Correct answer: Project name, scale, revision date, and designer name
The title block is a standardized section that identifies the project, drawing scale, revision history, and the responsible designer or firm.
Question 5: On a lighting plan, a fixture symbol labeled 'P-2' refers to which document for detailed specifications?
- The wire schedule
- The fixture schedule or legend (Correct answer)
- The site survey
- The electrical load calculation sheet
Correct answer: The fixture schedule or legend
Alphanumeric fixture tags like 'P-2' cross-reference the fixture schedule or legend, which lists wattage, lamp type, finish, and manufacturer details.
Question 6: When a landscape lighting plan notes 'homerun to transformer,' what does this indicate about the wire routing?
- Each fixture has its own dedicated wire back to the transformer (Correct answer)
- All fixtures share one continuous loop wire
- The wire runs through a conduit to the main panel
- Two wires are twisted together to reduce voltage drop
Correct answer: Each fixture has its own dedicated wire back to the transformer
A 'homerun' wiring method means each zone or fixture has an individual wire run directly back to the transformer, improving voltage control.
Question 7: A landscape lighting blueprint shows an arrow with 'N' at its tip in the upper corner. What is the purpose of this symbol?
- It indicates the direction of prevailing wind for fixture placement
- It is the north arrow used to orient the plan to true or magnetic north (Correct answer)
- It marks the nearest utility pole connection point
- It shows the direction of the main electrical service entry
Correct answer: It is the north arrow used to orient the plan to true or magnetic north
The north arrow is a standard cartographic symbol that orients the plan so viewers understand the directional layout of the property.
LLC Blueprint Reading & Interpretation 2
On a landscape lighting blueprint, what does a dashed line typically represent?