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Environmental Standards Flashcards

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

Read the first 7 Environmental Standards flashcards as text

  1. Radon gas in homes primarily originates from the natural decay of which element in soil and rock?

    Answer: Uranium

    Radon is a radioactive decay product of uranium found in soil and rock.

  2. Which radon mitigation method is most commonly used in homes with a basement or slab-on-grade foundation?

    Answer: Active sub-slab depressurization

    A fan draws soil gas from beneath the slab and vents it above the roof.

  3. Per IRC Appendix F, a radon vent pipe should terminate at least how far above the roof surface?

    Answer: 12 inches

    The radon vent must extend at least 12 inches above the roof.

  4. Carbon monoxide alarms installed in dwellings should be listed to which UL standard?

    Answer: UL 2034

    UL 2034 covers single- and multiple-station CO alarms; UL 217 covers smoke alarms.

  5. Under the IRC, carbon monoxide alarms are required in new dwellings that have which condition?

    Answer: Fuel-fired appliances or an attached garage

    CO alarms are required where fuel-burning appliances or attached garages create CO risk.

  6. Which building material is a common indoor source of formaldehyde emissions?

    Answer: Particleboard and MDF

    Pressed wood products bonded with urea-formaldehyde resins off-gas formaldehyde.

  7. EPA guidance suggests hiring a professional for mold cleanup when the affected area exceeds about how much?

    Answer: 10 square feet

    EPA advises professional remediation for mold areas larger than roughly 10 sq ft.