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Industrial Hygiene and Health Hazards Flashcards

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

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  1. What is the OSHA Permissible Exposure Limit (PEL) for an 8-hour time-weighted average (TWA) for noise in general industry?

    Answer: 90 dBA

    OSHA's PEL for occupational noise exposure is 90 dBA as an 8-hour TWA for general industry under 29 CFR 1910.95.

  2. Which sampling method measures a worker's actual breathing zone exposure to airborne contaminants throughout a work shift?

    Answer: Personal sampling

    Personal sampling involves placing a collection device in the worker's breathing zone to accurately measure individual exposure over a shift.

  3. What term describes the concentration of a chemical at which 50% of a test animal population dies within a specified period?

    Answer: LC50

    LC50 (Lethal Concentration 50) is the airborne concentration that kills 50% of test animals, while LD50 refers to a lethal dose via ingestion or skin contact.

  4. OSHA's Hazard Communication Standard (HazCom) requires Safety Data Sheets to follow which format?

    Answer: 16-section GHS format

    OSHA's HazCom 2012 (29 CFR 1910.1200) aligns with GHS and requires SDSs to have a standardized 16-section format.

  5. Which type of health hazard results from a single short-term exposure to a high concentration of a substance?

    Answer: Acute health effect

    Acute health effects occur rapidly after a single or short-term exposure to a hazardous substance at high concentrations.

  6. Which industrial hygiene control is considered the most effective method for reducing worker exposure to chemical hazards?

    Answer: Engineering controls — elimination or substitution

    The hierarchy of controls places elimination and substitution at the top as the most effective methods for permanently removing or reducing hazards.