CSLB C-15 Flooring and Floor Covering (Trade Exam) — All Questions
12 questions
What is the purpose of the safety cuts Armstrong describes in freehand knifing?
- a.To release trapped adhesive
- b.To mark the seam location
- c.To keep it from tearing✓
- d.To shorten the open time
Armstrong says safety cuts keep the material from tearing at corners and around objects while it is fit. Seams are marked separately. Safety cuts are made before adhesive is spread. Open time is a property of the adhesive.Armstrong F-5061 Ch. 6 §A-1b
How can a sheet installer save one wall's fitting, according to Armstrong?
- a.Align a factory edge with a straight wall✓
- b.Fit the sheet tight to the walls
- c.Overlap the sheet onto the wall base
- d.Cut the sides before entering the room
Armstrong notes you can often align the factory edge of the material with a straight wall, which saves fitting that wall and helps align the pattern. Fitting tight to walls is something Congoleum says not to do. Cutting all sides outside the room is pattern scribing's job, not a shortcut. Lapping onto base is not a fit.Armstrong F-5061 Ch. 6 §A-1a
When does Armstrong say the final fitting cuts are made in a freehand-knifed sheet?
- a.The day after the adhesive sets
- b.Before the adhesive is spread
- c.Before the safety cuts are made
- d.After it is adhered and rolled✓
Armstrong says the adhesive should be under the material and rolled before the final cuts are made. Cutting before adhesive risks short edges when the sheet settles. Waiting a day lets the adhesive set before trimming. Safety cuts come first, before final fitting.Armstrong F-5061 Ch. 6 §A-1d
Patterned sheet pieces have been cut and numbered. In what order does Armstrong say to install them?
- a.In cut order, outside of the roll first✓
- b.In reverse order, inside of the roll first
- c.In the order they fit the room
- d.Largest piece first, then smaller
Armstrong says to install pieces in the order cut from the roll, from the outside of the roll first. Size is not the rule. Reverse order makes a short second piece that cannot be stretched to match. Fitting order is not the rule; cut order controls pattern runoff.Armstrong F-5061 Ch. 7 §A
How does Armstrong say job-length cuts of patterned sheet should be measured?
- a.From the room length alone
- b.From the factory-designated match length
- c.From actual matches in the material✓
- d.From the roll label's total footage
Armstrong says to make job-length cuts on the basis of actual matches in the material rather than factory-designated match lengths, because the pattern stretches. The factory figure can accumulate error over long cuts. Room length alone ignores the match. The roll footage says nothing about match.Armstrong F-5061 Ch. 7 §A
A sheet has embossed grout lines 3/16 inch wide. Where does Congoleum say to cut the seam?
- a.One inch outside the grout line
- b.Centered in the grout line✓
- c.On the shoulder of the grout line
- d.Anywhere in the tile face
For grout lines wider than 5/32 inch, Congoleum cuts the seam in the center of the embossed line; 3/16 inch is wider than 5/32. Cutting on the shoulder is its rule for narrower grout lines. Cutting in the tile face shows the seam. An inch outside breaks the pattern.Congoleum felt-back sheet installation guidelines
Laying resilient tile, why does Armstrong leave a small exposed spot where the chalk lines cross?
- a.To mark where rolling starts
- b.To vent moisture from the slab
- c.To test the adhesive's open time
- d.To re-strike the line over the adhesive✓
Armstrong leaves exposed spots where lines cross and meet the wall so the original line can be re-struck on top of the dried adhesive. It is not a moisture vent. Open time is tested by touch. Rolling is not keyed to the line crossing.Armstrong F-5061 Ch. 6 §B-3
Tile corners stop meeting exactly as an installation moves across a room. What does Armstrong call this, and what causes it?
- a.Bleeding, from too much adhesive
- b.Run-off; subfloor not level✓
- c.Telegraphing, from trowel ridges
- d.Peaking, from power stretching
Armstrong calls it run-off and says it may occur if the subfloor is not completely level. Peaking is a carpet seam term from stretching. Telegraphing is show-through of substrate or trowel marks. Bleeding is adhesive squeezing up at joints.Armstrong F-5061 Ch. 6 §B-4
When may a commercial sheet installed with the dry-to-touch adhesive method be heat welded, under Armstrong's instructions?
- a.After 24 hours
- b.Immediately✓
- c.After 7 days
- d.After 10 hours
Armstrong says flooring installed by the dry-to-touch method may be heat welded immediately, while other installations wait at least 10 hours. Ten hours is the rule for other methods. Twenty-four hours and seven days are not its figures.Armstrong F-5061 Ch. 7 §F
How must a Congoleum self-coved (flash-coved) installation be adhered?
- a.Fully adhered, never perimeter fastened✓
- b.Adhered on the wall only
- c.Perimeter fastened with staples
- d.Loose laid with tape at the seams
Congoleum says self-coved installations must be fully adhered and must not be perimeter fastened. Staples at the perimeter, loose lay and adhering only the wall portion all leave parts of the cove or floor unbonded.Congoleum felt-back sheet installation guidelines
How does the federal resilient flooring specification say rubber flooring products should be stored?
- a.With carpet, to share climate control
- b.Outdoors, out of direct sun
- c.In occupied spaces for warmth
- d.Away from VOC-adsorbing materials✓
The specification says not to store rubber surface products with materials that have a high capacity to adsorb VOC emissions, and not to store exposed rubber in occupied spaces. Storing with carpet puts it next to an adsorbing material. Outdoor storage fails the clean, dry, temperature-controlled requirement. Occupied spaces are excluded.UFGS 09 65 00 §1.4
What VOC limit does SCAQMD Rule 1168 set for VCT and asphalt tile adhesive?
- a.60 g/L
- b.100 g/L
- c.150 g/L
- d.50 g/L✓
Rule 1168 lists VCT and asphalt tile adhesive at 50 g/L. Sixty g/L is the rubber floor adhesive limit. One hundred appears for wood flooring adhesive in the first column. One hundred fifty is not the table's figure for this category.SCAQMD Rule 1168, Table 1