CFI Measurement & Layout Planning 3 — Questions and Answers
Question 1: A bathroom measures 7 ft 6 in × 9 ft 3 in. What is the area in square feet?
- 69.375 sq ft (Correct answer)
- 63.25 sq ft
- 74.5 sq ft
- 66.0 sq ft
Correct answer: 69.375 sq ft
Convert to decimals: 7.5 ft × 9.25 ft = 69.375 sq ft.
Question 2: When planning a herringbone pattern layout, what additional layout step is required compared to a standard straight layout?
- A second chalk line perpendicular to the first must be established at the center (Correct answer)
- Only one diagonal chalk line is needed
- No chalk lines are needed — tiles self-align
- The perimeter must be tiled first before the field
Correct answer: A second chalk line perpendicular to the first must be established at the center
Herringbone layouts require two perpendicular reference lines intersecting at the center to keep the 90-degree alternating pattern aligned across the room.
Question 3: What is 'dry-laying' or 'dry-fitting' flooring before installation?
- Installing flooring without adhesive to test the pattern and fit before committing to a permanent install (Correct answer)
- Allowing flooring material to acclimate in a dry environment
- Cutting all pieces to size before opening adhesive
- Checking subfloor moisture without a meter
Correct answer: Installing flooring without adhesive to test the pattern and fit before committing to a permanent install
Dry-laying means temporarily placing flooring pieces without adhesive to verify the pattern, cuts, and layout before permanent installation.
Question 4: How many square feet are in a room that measures 13 ft × 15 ft, and how much material should you order if you add 10% for waste?
- 195 sq ft; order 215 sq ft
- 195 sq ft; order 214.5 sq ft (Correct answer)
- 180 sq ft; order 198 sq ft
- 195 sq ft; order 205 sq ft
Correct answer: 195 sq ft; order 214.5 sq ft
13 × 15 = 195 sq ft; 195 × 1.10 = 214.5 sq ft is the amount to order.
Question 5: When using the 3-4-5 triangle method to check if a layout line is square, what does it confirm?
- That the room is a perfect square
- That two reference lines are perpendicular (90 degrees) to each other (Correct answer)
- That the subfloor is level within 3/16 inch
- That the measurement tape is accurate
Correct answer: That two reference lines are perpendicular (90 degrees) to each other
The 3-4-5 method (measuring 3 ft on one line, 4 ft on the other, and checking that the diagonal is 5 ft) confirms the two lines are at a true 90-degree angle.
Question 6: Which factor most directly determines whether flooring planks should run parallel or perpendicular to the longest wall?
- The color of the flooring
- The direction of floor joists below the subfloor
- The longest wall direction, which makes the room appear larger (Correct answer)
- The location of the main electrical panel
Correct answer: The longest wall direction, which makes the room appear larger
Running planks parallel to the longest wall (or toward the main light source) visually elongates the room and is the standard aesthetic guideline.
Question 7: An installer needs to tile a 200 sq ft room using 12×12-inch tiles. Approximately how many tiles are needed with a 10% waste allowance?
- 200 tiles
- 220 tiles (Correct answer)
- 180 tiles
- 210 tiles
Correct answer: 220 tiles
Each 12×12 tile covers 1 sq ft; 200 tiles cover the area, and 200 × 1.10 = 220 tiles with 10% waste.
CFI Measurement & Layout Planning 3
A bathroom measures 7 ft 6 in × 9 ft 3 in.
What is the area in square feet?