CFI CFI Tools & Equipment Operations 2 — Questions and Answers
Question 1: What is the main advantage of a power stretcher over a knee kicker for large carpet installations?
- It cuts carpet more accurately
- It provides far greater stretching force across large spans to prevent rippling (Correct answer)
- It replaces the need for tack strips
- It trims the carpet edge automatically
Correct answer: It provides far greater stretching force across large spans to prevent rippling
A power stretcher uses extension poles to span the room and applies substantial mechanical force, ensuring proper stretch across large areas that a knee kicker cannot achieve alone.
Question 2: Which trowel notch size is typically used for spreading full-spread sheet vinyl adhesive?
- 1/16 × 1/16 × 1/16 inch V-notch (Correct answer)
- 1/8 × 1/8 × 1/8 inch square-notch
- 3/16 × 5/32 inch U-notch
- 1/4 × 3/8 inch square-notch
Correct answer: 1/16 × 1/16 × 1/16 inch V-notch
Sheet vinyl adhesives typically call for a fine 1/16 × 1/16 × 1/16 inch V-notch trowel to apply a thin, even adhesive coat that prevents bleed-through.
Question 3: What is the function of a chalk line in flooring installation?
- To score tile for cutting
- To snap straight reference lines on the subfloor for layout alignment (Correct answer)
- To mark adhesive spread areas
- To measure room square footage
Correct answer: To snap straight reference lines on the subfloor for layout alignment
A chalk line is snapped on the subfloor to create straight reference lines that guide tile, plank, or sheet goods placement in proper alignment.
Question 4: A jamb saw (undercutter) is used in flooring installation specifically to:
- Cut notches in planks around pipes
- Trim door casings and jambs to allow flooring to slide underneath (Correct answer)
- Bevel the edges of hardwood planks
- Score tile before snapping
Correct answer: Trim door casings and jambs to allow flooring to slide underneath
A jamb saw undercuts door casings and jambs flush with the subfloor so flooring can slide beneath them for a clean, professional finish.
Question 5: When using a tile wet saw, the blade must be kept cool and clean by:
- Running the blade at maximum speed without water
- Maintaining a continuous flow of water over the blade during cutting (Correct answer)
- Applying cutting oil to the tile surface
- Using compressed air to cool the blade
Correct answer: Maintaining a continuous flow of water over the blade during cutting
A continuous water flow cools the diamond blade, suppresses silica dust, and prevents thermal cracking of the tile during cuts.
Question 6: What is the purpose of the 'teeth' (grip pins) on a knee kicker head?
- To cut the carpet backing during stretching
- To grip the carpet pile and backing so force is transferred without slipping (Correct answer)
- To mark the stretch direction on the carpet
- To perforate the carpet for adhesive bonding
Correct answer: To grip the carpet pile and backing so force is transferred without slipping
The adjustable teeth penetrate the carpet backing to grip it securely so the installer's knee thrust transfers as stretching force rather than just pushing the tool.
CFI CFI Tools & Equipment Operations 2
What is the main advantage of a power stretcher over a knee kicker for large carpet installations?