CFI Surface Preparation & Safety Procedures 4

Question 1

When installing flooring over radiant heat, the maximum recommended subfloor surface temperature at time of installation is:

Accepted Answer

85°F (29°C)

Answer

Most manufacturers specify that radiant-heated subfloor temperatures must not exceed 85°F during installation to avoid premature adhesive set.

Question 2

A floor self-leveling compound is specified at a maximum pour depth of 1 inch per lift. What should the installer do if a depression is 2 inches deep?

Accepted Answer

Apply in two separate lifts, allowing the first to cure per manufacturer specs

Answer

Exceeding the maximum pour depth causes shrinkage cracking; applying in multiple lifts as recommended ensures proper cure.

Question 3

Before applying a skim coat of embossing leveler over existing resilient flooring, the installer should verify:

Accepted Answer

The existing floor is structurally sound and fully bonded

Answer

Embossing leveler requires a stable, fully adhered substrate; any loose sections will telegraph through the new flooring.

Question 4

Which OSHA standard specifically governs the permissible exposure limit (PEL) for respirable crystalline silica in construction?

Accepted Answer

29 CFR 1926.1153

Answer

29 CFR 1926.1153 is OSHA's silica standard for construction, setting a PEL of 50 µg/m³ as an 8-hour TWA.

Question 5

When scarifying a concrete subfloor to remove a thick adhesive residue, the installer should use:

Accepted Answer

A mechanical scarifier or shot blaster

Answer

Mechanical scarifiers and shot blasters efficiently remove thick adhesive residue and profile the concrete surface for re-bonding.

(CFI) Certified Flooring Installer Practice Test

(CFI) Certified Flooring Installer Practice Test

CFI Surface Preparation & Safety Procedures 4