CRC Blueprint Reading & Specifications 2 — Questions and Answers
Question 1: On a residential blueprint, what does the abbreviation 'CLG HT' typically indicate?
- Ceiling height (Correct answer)
- Column height
- Clearance height
- Crown height
Correct answer: Ceiling height
CLG HT stands for ceiling height, a critical dimension shown on floor plans and sections.
Question 2: A dashed line on a floor plan most commonly represents:
- A wall to be removed
- An overhead feature or hidden element above the cut plane (Correct answer)
- A property boundary
- A future addition
Correct answer: An overhead feature or hidden element above the cut plane
Dashed (hidden) lines on floor plans represent features above the standard 4-foot cut plane, such as upper cabinets or headers.
Question 3: In construction specifications, Division 03 of the MasterFormat refers to:
- Masonry
- Concrete (Correct answer)
- Metals
- Wood and Plastics
Correct answer: Concrete
MasterFormat Division 03 covers concrete work including formwork, reinforcing, and cast-in-place concrete.
Question 4: What does a triangle symbol with a letter or number inside it on blueprints typically denote?
- A revision cloud reference
- A section cut reference pointing to another sheet (Correct answer)
- A door schedule entry
- A north arrow variation
Correct answer: A section cut reference pointing to another sheet
A triangle with a letter/number is a section reference bubble, indicating where a section cut is taken and which sheet shows the detail.
Question 5: On a site plan, contour lines that are close together indicate:
- Flat terrain
- Steep slope (Correct answer)
- A drainage swale
- Underground utilities
Correct answer: Steep slope
Closely spaced contour lines mean the elevation changes rapidly over a short horizontal distance, indicating steep terrain.
Question 6: Which scale is most commonly used for residential floor plans in the United States?
- 1/8" = 1'-0"
- 1/4" = 1'-0" (Correct answer)
- 1" = 10'-0"
- 1/2" = 1'-0"
Correct answer: 1/4" = 1'-0"
Quarter-inch scale (1/4" = 1'-0") is the standard for residential floor plans, balancing detail and sheet size.
Question 7: A specification section labeled '09 91 00' in MasterFormat most likely covers:
- Flooring
- Painting (Correct answer)
- Ceiling systems
- Wall finishes
Correct answer: Painting
MasterFormat section 09 91 00 falls under Division 09 Finishes and specifically covers painting and coating work.
CRC Blueprint Reading & Specifications 2
On a residential blueprint, what does the abbreviation 'CLG HT' typically indicate?