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Quality Control & Maintenance Practices Flashcards

7 cards from real CFI practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Quality Control & Maintenance Practices flashcards as text

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

    Answer: 1/16 inch

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

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

    Answer: In-situ relative humidity probe test

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

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

    Answer: Use furniture cups or coasters under legs

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

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

    Answer: To ensure uniform adhesive thickness and eliminate voids

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

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

    Answer: Low humidity or dry conditions after installation

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

  6. What is the recommended overlap when using the calcium chloride MVER test on concrete with radiant heat?

    Answer: The radiant system must be off for 72 hours before testing and on for 24 hours after

    For radiant-heated slabs, ASTM F1869 requires the system be operating for at least 24 hours before testing to normalize conditions.

  7. Which of the following is a sign of inadequate adhesive transfer when installing ceramic tile?

    Answer: Tiles that sound hollow when tapped

    A hollow sound when tiles are tapped indicates voids beneath the tile where adhesive did not achieve full coverage or bond.