Practice Test Geeks(ACI) American Concrete Institute Concrete Finisher Practice Test
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Environmental & Worker Safety Flashcards

7 cards from real ACI 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 & Worker Safety flashcards as text

  1. During a confined space entry to finish concrete in a deep vault, which atmospheric hazard must be tested FIRST before entry?

    Answer: Oxygen level, followed by flammable gases, then toxic contaminants

    OSHA 29 CFR 1926.1203 requires testing oxygen content first because an oxygen-deficient atmosphere makes toxic and flammable readings unreliable and instantly endangers the entrant.

  2. What best management practice (BMP) must be installed downslope of concrete work to prevent alkaline runoff from leaving a construction site?

    Answer: Concrete washout containment berms and sediment controls such as silt fences

    Containment berms capture concrete washout and alkaline runoff, while silt fences trap suspended solids, preventing regulated pollutants from reaching stormwater channels.

  3. Which standard sets the minimum requirements for the design and testing of eye and face protection used when handling wet concrete?

    Answer: ANSI/ISEA Z87.1

    ANSI/ISEA Z87.1 covers the performance criteria for eye and face protective devices including chemical splash goggles needed when working with wet concrete.

  4. A finisher is using a gas-powered concrete saw in a partially enclosed area. Which atmospheric hazard is the primary concern?

    Answer: Carbon monoxide buildup from combustion exhaust

    Gas-powered equipment produces carbon monoxide, which accumulates rapidly in enclosed or semi-enclosed spaces and can cause unconsciousness or death before symptoms are recognized.

  5. When curing compounds are sprayed on fresh concrete, which PPE is MOST critical to prevent respiratory sensitization?

    Answer: A supplied-air respirator or NIOSH-approved organic vapor respirator with P100 filter

    Many curing compounds contain solvents or isocyanates that require organic vapor protection beyond what a standard particulate respirator provides.

  6. What is the maximum noise exposure level (dBA) permitted by OSHA for an 8-hour workday without hearing protection?

    Answer: 90 dBA

    OSHA's permissible exposure limit for noise is 90 dBA as an 8-hour TWA under 29 CFR 1910.95/1926.52, above which engineering controls or hearing protection are mandatory.

  7. Which form of silicosis is associated with very high silica exposures over a short period (weeks to 5 years) and carries the worst prognosis?

    Answer: Accelerated silicosis

    Accelerated silicosis develops within 5 years of very heavy silica exposure, progresses rapidly, and has a poorer prognosis than the more slowly developing chronic form.