Practice Test Geeks(HSE) Certified Health Safety Environment Practice Test
← All HSE Flashcard Decks

Occupational Health and Hygiene Flashcards

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

Read the first 7 Occupational Health and Hygiene flashcards as text

  1. When performing a personal air sampling for an 8-hour TWA, where should the sampling pump and filter cassette be positioned on the worker?

    Answer: In the worker's breathing zone, within 12 inches of the nose and mouth

    Personal air samples must be collected in the breathing zone — within approximately 12 inches of the nose and mouth — to accurately represent the air the worker actually inhales.

  2. Which type of hazardous substance is most effectively captured by a charcoal adsorption tube during air sampling?

    Answer: Volatile organic compounds (VOCs) such as benzene and toluene

    Activated charcoal tubes adsorb volatile organic compounds from sampled air; the compounds are later desorbed and analyzed by gas chromatography.

  3. In the context of occupational hygiene, what does 'engineering controls' specifically refer to?

    Answer: Physical modifications to the workplace, equipment, or process to reduce hazard exposure

    Engineering controls are physical or mechanical changes — such as enclosures, LEV systems, substitution, or process changes — that reduce or eliminate the hazard at its source.

  4. Whole-body vibration (WBV) is most associated with which occupational health disorder?

    Answer: Low back pain and spinal degeneration

    WBV transmitted through a seat or floor (e.g., heavy equipment operators) is strongly associated with low back pain, disc degeneration, and other spinal disorders.

  5. The NIOSH lifting equation recommends a maximum weight limit (RWL) based on six task variables. Which factor, when minimized, most significantly reduces the recommended weight limit?

    Answer: Horizontal distance from the body to the object at the start of the lift

    The horizontal distance (H factor) has the greatest mechanical disadvantage on the spine; doubling H from 10 to 20 inches cuts the RWL in half through its reciprocal relationship in the equation.

  6. Under OSHA's Hazard Communication Standard (HazCom/GHS), a Safety Data Sheet (SDS) must contain how many sections?

    Answer: 16 sections

    OSHA's HazCom Standard, aligned with GHS, requires SDSs to have exactly 16 standardized sections covering identity, hazards, composition, first aid, fire fighting, and more.

  7. A worker exposed to lead at levels exceeding the OSHA action level must be removed from exposure (medical removal protection) when blood lead levels reach which threshold?

    Answer: 50 μg/dL

    OSHA's Lead Standard (29 CFR 1910.1025) requires medical removal when a worker's blood lead level reaches 50 μg/dL, with return only after levels fall to 40 μg/dL.