Practice Test Geeks(CRC) Certified Residential Contractor Practice Test
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Building Codes & Standards 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 Building Codes & Standards flashcards as text

  1. Under the IRC, what is the minimum width required for a residential stairway?

    Answer: 36 inches

    IRC Section R311.7.1 requires residential stairways to be at least 36 inches wide, measured at or below the handrail height.

  2. A fire separation wall between an attached garage and a living area must be constructed using which minimum assembly under the IRC?

    Answer: 1/2-inch drywall on the garage side

    IRC R302.6 requires a minimum of 1/2-inch gypsum board applied to the garage side of walls and ceilings separating the garage from the dwelling.

  3. Under the International Energy Conservation Code (IECC), which of the following is the primary method used to demonstrate residential energy code compliance?

    Answer: Prescriptive path, performance path, or the ERI path

    The IECC allows residential compliance via the prescriptive path (component minimums), the performance path (energy modeling), or the Energy Rating Index (ERI) path.

  4. Which plumbing code is most commonly adopted by states for residential construction in the United States?

    Answer: Uniform Plumbing Code (UPC) or International Plumbing Code (IPC)

    States typically adopt either the Uniform Plumbing Code (UPC) published by IAPMO or the International Plumbing Code (IPC) published by the ICC.

  5. Under the IRC, what is the maximum rise allowed for each individual stair riser in residential construction?

    Answer: 7-3/4 inches

    IRC Section R311.7.5.1 limits the maximum riser height to 7-3/4 inches for residential stairways.

  6. What is the primary purpose of a vapor retarder installed in residential wall assemblies?

    Answer: To reduce moisture diffusion through the wall assembly and prevent condensation damage

    A vapor retarder limits moisture diffusion through wall assemblies, preventing condensation within the cavity that could cause mold or structural damage.

  7. Under the IRC, carbon monoxide alarms are required in residential units that contain which of the following?

    Answer: Fuel-burning appliances or an attached garage

    IRC R315 requires CO alarms in dwellings that contain fuel-burning appliances (gas, oil, wood) or have an attached garage.