NCCER - National Center for Construction Education and Research Reading Construction Drawings Questions and Answers 1 — Questions and Answers
Question 1: On a set of construction drawings, which type of line is thick and solid, used to represent the main outlines of a building or structure that are visible in a particular view?
- Hidden line
- Center line
- Object line (Correct answer)
- Dimension line
Correct answer: Object line
Object lines, also known as visible lines, are the thickest and most prominent lines on a blueprint. They are used to show the major outlines of the features of the building, such as walls, floors, and roofs, that are directly visible from the perspective of the drawing.
Question 2: A craftsperson is looking at a floor plan with a scale of 1/4" = 1'-0". Using an architect's scale, they measure a wall to be 3 1/2 inches long. What is the actual length of the wall?
- 7 feet
- 10 feet
- 12 feet
- 14 feet (Correct answer)
Correct answer: 14 feet
The scale 1/4" = 1'-0" means that every quarter-inch on the drawing represents one foot in reality. To find the actual length, you divide the measured length (3.5 inches) by the scale factor (0.25 inches per foot). 3.5 / 0.25 = 14. Therefore, the actual length of the wall is 14 feet.
Question 3: While reviewing a set of blueprints, you need to find information such as the project name, architect's contact information, drawing scale, and the date of the last revision. In which part of the drawing would you find this information consolidated?
- Legend
- Title Block (Correct answer)
- General Notes
- Drawing Index
Correct answer: Title Block
The title block, typically located in the bottom right corner of every drawing sheet, contains essential project information. This includes the project name and location, architect/engineer details, the drawing scale, revision history, sheet title, and sheet number.
Question 4: Which of the following drawing types primarily focuses on the building's strength, stability, and the materials required for its framework, such as foundations, beams, and columns?
- Architectural Drawings
- Mechanical Drawings
- Plumbing Drawings
- Structural Drawings (Correct answer)
Correct answer: Structural Drawings
Structural drawings are created by engineers and provide detailed information about the building's framework and load-bearing components. They focus on ensuring the strength and stability of the structure, specifying details for foundations, columns, beams, and connections.
Question 5: A dashed line on a floor plan typically represents an object or feature that is:
- to be demolished.
- the central axis of a symmetrical object.
- a visible, primary outline.
- hidden from view in that specific plan. (Correct answer)
Correct answer: hidden from view in that specific plan.
Dashed lines, often called hidden lines, are used on construction drawings to indicate edges or features that are not visible from the current viewpoint. For example, on a floor plan, they might show a beam in the ceiling above or a foundation element below.
Question 6: An electrical plan is being reviewed for a new commercial building. To understand what a specific symbol for a GFI outlet represents, which part of the construction drawing set should be consulted first?
- The Title Block
- The Legend or Symbol List (Correct answer)
- The Elevation View
- The General Notes
Correct answer: The Legend or Symbol List
The legend, or symbol list, is a key component of a drawing set that defines all the symbols, abbreviations, and hatching patterns used throughout the plans. When encountering an unfamiliar symbol, the legend is the first place to look for its meaning.
NCCER - National Center for Construction Education and Research Reading Construction Drawings Questions and Answers 1
On a set of construction drawings, which type of line is thick and solid, used to represent the main outlines of a building or structure that are visible in a particular view?