CFI Vinyl & Resilient Flooring 4

Question 1

Which ASTM standard governs the in-situ relative humidity (RH) probe test for concrete slabs under resilient flooring?

Accepted Answer

ASTM F2170

Answer

ASTM F2170 covers the standard practice for determining relative humidity using in-situ probes in concrete floor slabs.

Question 2

When a floating LVP floor is installed in an L-shaped room, what must be placed at the inside corner where the two sections meet?

Accepted Answer

A T-molding transition

Answer

A T-molding transition at the inside corner of an L-shaped room allows each section to expand and contract independently without buckling.

Question 3

What is the recommended overlap when installing an underlayment pad beneath floating LVP?

Accepted Answer

Butt the edges — no overlap

Answer

Underlayment sheets should be butted edge-to-edge and taped at the seams to prevent ridges that would telegraph through the flooring.

Question 4

Which type of resilient flooring contains a fiberglass-reinforced core that provides superior dimensional stability?

Accepted Answer

WPC (Wood Plastic Composite) LVP

Answer

WPC luxury vinyl plank includes a foamed wood-plastic composite core with fiberglass reinforcement, making it highly stable against temperature and humidity changes.

Question 5

What is the standard maximum moisture vapor emission rate (MVER) allowed by most resilient flooring adhesive manufacturers for concrete slabs?

Accepted Answer

5 lbs/1,000 sq ft/24 hr

Answer

The industry-standard maximum MVER for most resilient adhesive systems is 5 lbs per 1,000 sq ft per 24 hours per ASTM F1869.

(CFI) Certified Flooring Installer Practice Test

(CFI) Certified Flooring Installer Practice Test

CFI Vinyl & Resilient Flooring 4