CFI Quality Control & Maintenance Practices 3

Question 1

When inspecting a completed tile installation, what is the maximum allowable lippage between adjacent tiles per ANSI A108.02 standards?

Accepted Answer

1/16 inch

Answer

ANSI A108.02 allows a maximum lippage of 1/16 inch between adjacent tiles when grout joints are 1/16 inch or less.

Question 2

Which type of moisture test measures the relative humidity inside a concrete slab?

Accepted Answer

In-situ relative humidity probe test

Answer

In-situ relative humidity probe tests (per ASTM F2170) measure moisture levels within the concrete slab itself, which is more accurate than surface tests.

Question 3

A customer complains that their carpet is developing permanent indentations from furniture. What is the best preventive recommendation?

Accepted Answer

Use furniture cups or coasters under legs

Answer

Furniture cups or coasters distribute the weight of furniture legs over a larger surface area, preventing permanent pile compression.

Question 4

What is the purpose of back-rolling adhesive when installing sheet vinyl flooring?

Accepted Answer

To ensure uniform adhesive thickness and eliminate voids

Answer

Back-rolling with a weighted roller after laying the flooring ensures full contact between the adhesive and flooring, eliminating air pockets and voids.

Question 5

During a hardwood floor inspection, you find that boards have excessive end gaps. What environmental condition most likely caused this?

Accepted Answer

Low humidity or dry conditions after installation

Answer

Wood shrinks across the grain and lengthwise when humidity drops, causing boards to contract and create visible end gaps.

(CFI) Certified Flooring Installer Practice Test

(CFI) Certified Flooring Installer Practice Test

CFI Quality Control & Maintenance Practices 3