Practice Test Geeks(CRC) Certified Residential Contractor Practice Test
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Quality Control & Inspection Flashcards

7 cards from real CRC 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 & Inspection flashcards as text

  1. Under the IRC, what is the minimum R-value required for insulation in an exterior wall in Climate Zone 5?

    Answer: R-13 + R-5 continuous

    IRC Table N1102.1.2 requires Climate Zone 5 wood-framed walls to have R-20 cavity insulation or R-13 plus R-5 continuous insulation.

  2. A quality control inspection of a residential HVAC system should verify that duct leakage does not exceed what maximum percentage of the total air flow under IECC 2021 requirements?

    Answer: 4%

    IECC 2021 Section R403.3.4 limits total duct leakage to 4 CFM25 per 100 square feet of conditioned floor area as verified by a leakage test.

  3. During a final inspection, the inspector checks all GFCI outlets near water sources. Which location does NOT require GFCI protection under the NEC?

    Answer: Receptacles in a dedicated home office more than 10 feet from any water source on the second floor

    NEC 210.8 requires GFCI protection in bathrooms, kitchens, garages, outdoors, crawl spaces, unfinished basements, boathouses, and near pools, but not in standard interior rooms far from water.

  4. What is the correct sequence for quality inspections in a typical residential new construction project?

    Answer: Foundation → Rough framing → Rough MEP → Insulation → Drywall → Final

    The standard inspection sequence follows construction phasing: foundation, then framing, then mechanical/electrical/plumbing rough-in, insulation, drywall, and final inspection.

  5. A contractor is evaluating hardwood flooring delivered to the job site. Quality control requires that the flooring acclimate on-site before installation. What environmental conditions are required during acclimation?

    Answer: The home must be at its normal living temperature and humidity levels

    Hardwood flooring must acclimate to the home's expected occupied temperature and humidity to minimize expansion, contraction, and gapping after installation.

  6. Which test is used to verify the air leakage performance of a completed residential building envelope?

    Answer: Blower door test

    A blower door test depressurizes the building to measure air changes per hour (ACH50) and is the standard method for verifying whole-house air sealing quality.

  7. During a tile installation quality inspection, the inspector finds that large-format tiles (18x18) have hollow areas beneath them when tapped. This indicates:

    Answer: Inadequate mortar coverage, requiring removal and reinstallation

    Hollow-sounding tiles indicate voids in the mortar bed which can lead to cracking and tile failure; ANSI A108.5 requires minimum 80% mortar contact (95% in wet areas).