448A Floorcovering Installer Practice Quiz
Free · 205 Questions.

• Type 1 operation
• Type 2 operation
• Type 3 operation
• Not classified because the tiles are non-friable

Why: Section 12(2) paragraph 2 lists installing or removing non-friable asbestos-containing material, other than ceiling tiles, without breaking, cutting, drilling, abrading, grinding, sanding or vibrating it as a Type 1 operation. Type 1 still carries required measures such as dust control and HEPA or wet cleanup.

• Not greater than 90% RH by in-situ probe, or 80% RH by sealed hood, with a maximum pH of 9
• Not greater than 99% RH by in-situ probe, or 95% RH by sealed hood, with a maximum pH of 12
• Not greater than 75% RH by in-situ probe, or 60% RH by sealed hood, with a maximum pH of 7
• Not greater than 85% RH by in-situ probe, or 70% RH by sealed hood, with a maximum pH of 10

Why: The Interface manual says the moisture content measured by hygrometer shall not be greater than 90% RH by in-situ probe and 80% RH by sealed hood, with a maximum pH of 9, for Inter-Tac or TacTile. If the readings are higher, the installer stops and seeks advice.

• 1% to 1-1/2% in both width and length, using a power stretcher
• 3% to 4% in the length direction only, using a knee kicker to apply the pull
• 1/2% in the width direction only, using a stretcher hook or similar tool
• 5% in both directions, using a stinger or spike set into the backing

Why: Shaw says the carpet must be stretched 1% to 1-1/2% in both the width and length directions with a power stretcher, and that it does not recommend a stretcher hook, stinger or spike. Masland adds that too little stretch, for example from poor conditioning, can lead to wrinkling.

• A 3.5 mm wide U-shaped groove, cut down to the jute fibres but not through them
• A 6 mm wide V-shaped groove, cut through the jute fibres into the adhesive
• A 1 mm wide slit cut halfway through the surface layer of the linoleum
• A 5 mm wide flat groove cut to a depth of 0.5 mm into the linoleum surface

Why: Forbo says to groove to a 3.5 mm wide U-shape, with the depth on 2.0 mm and 2.5 mm material down to the jute fibres but not through them. On thicker gauges the groove depth is 2.5 mm. Correct width and depth give the rod a secure bond.

• At least 1/2 in at walls and fixed objects, plus 1/16 in per extra 10 ft over 30 ft, and a T-moulding in doorways
• At least 1/16 in at walls only, with the same gap for every run length and no moulding needed in the doorways or openings
• At least 3 in at walls and fixed objects, with less for long runs and no gap left at all in the doorways
• No gap at walls if the planks are glued down, with a reducer fastened through the planks in the doorways

Why: The guide requires at least 1/2 in between the flooring and all walls and vertical objects such as cabinets and pipes, with greater expansion for runs over 30 ft (about 1/16 in for every additional 10 ft). A T-moulding is used in doorways so that separate areas can move without interference.