Occupational Exposure Limits Quiz
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Questions and Answers

Which PPE level requires the highest level of respiratory protection?

  • Level C
  • Level D
  • Level A
  • Level B (correct)

    • What is the primary purpose of ergonomics in the workplace?

  • To eliminate all workplace hazards.
  • To increase productivity by any means necessary.
  • To design systems that fit the needs of the user. (correct)
  • To comply with regulatory standards only.

    • Which of the following is a consequence of Cumulative Trauma Disorder (CTD)?

  • Long-term psychological impacts from workplace stress.
  • Immediate injury upon exposure to hazards.
  • Work related decrease in emotional productivity.
  • Work related musculoskeletal injuries. (correct)

    • Which type of PPE level provides minimal protection and is primarily a work uniform?

    <p>Level D (D)</p> Signup and view all the answers

    What does WBGT stand for in workplace environmental monitoring?

    <p>Wet Bulb Globe Temperature (A)</p> Signup and view all the answers

    Which material is considered effective for protection against acetic acid?

    <p>Nitrile Latex (A)</p> Signup and view all the answers

    What is the main cause of hyperthermia?

    <p>Dehydration and heat stress. (B)</p> Signup and view all the answers

    What condition is characterized by high body temperature and can lead to heat stroke?

    <p>Hyperthermia (D)</p> Signup and view all the answers

    What aspect does anthropometry focus on in workplace design?

    <p>The study of human body sizes. (A)</p> Signup and view all the answers

    Which of the following elements is NOT part of the NIOSH Lifting Equation?

    <p>Lifting duration (B)</p> Signup and view all the answers

    What is the primary role of an Occupational Exposure Limit (OEL)?

    <p>To define the maximum concentration of hazardous substances for safety (A)</p> Signup and view all the answers

    Which of the following describes the Threshold Limit Value - Time Weighted Average (TLV-TWA)?

    <p>Calculates the average exposure over an 8-hour workday (C)</p> Signup and view all the answers

    What does the STEL value indicate for a substance like H2S?

    <p>Limit for short-term exposure within a specified time (B)</p> Signup and view all the answers

    Which fit test type relies on the user's senses to detect leaks?

    <p>Qualitative fit test (C)</p> Signup and view all the answers

    What syndrome is characterized by symptoms such as white finger and numbness due to vibration exposure?

    <p>Hand Arm Vibration Syndrome (C)</p> Signup and view all the answers

    What is the main function of a Self Contained Breathing Apparatus (SCBA)?

    <p>To supply breathable air in hazardous environments (A)</p> Signup and view all the answers

    What distinguishes a Closed Type SCBA from other SCBA types?

    <p>It processes and reuses exhaled air (C)</p> Signup and view all the answers

    Which equipment is typically used to measure vibration levels accurately?

    <p>Accelerometer or vibrometer (D)</p> Signup and view all the answers

    If the permissible exposure limit (PEL) for a chemical is not met, which organization sets the mandatory requirement?

    <p>OSHA (A)</p> Signup and view all the answers

    What is the maximum hose line permitted for an air line Breathing Apparatus (BA) according to OSHA?

    <p>300 ft (C)</p> Signup and view all the answers

    Flashcards

    Anthropometry

    The study of human body sizes and dimensions, especially in relation to workplace design.

    Level A PPE

    The highest level of personal protective equipment (PPE) providing maximum protection for skin, respiratory system, and eyes. It includes a positive pressure SCBA, a fully encapsulating chemical protective suit, and other necessary PPE.

    Cumulative Trauma Disorder (CTD)

    Long-term musculoskeletal injuries caused by repetitive work-related activities.

    Carpal Tunnel Syndrome

    A type of CTD affecting the wrist and hand, causing numbness, tingling, and pain. It arises from compression of the median nerve.

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    WBGT (Wet Bulb Globe Temperature)

    A measure of environmental factors that affect deep body temperature. It accounts for air temperature, humidity, and radiant heat.

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    Ergonomics

    Process of designing workplaces, products, or systems to fit the people who use them, considering their physical and cognitive abilities.

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    Epidemiology

    The study of how diseases spread in populations and the factors influencing their occurrence, prevention, and control.

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    Hyperthermia

    A condition caused by excessive heat exposure, leading to various symptoms like dehydration, heat rash, heat exhaustion, heat syncope, and heat stroke.

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    Hypothermia

    A condition caused by exposure to extreme cold, resulting in symptoms like cold burns, chilblains, frostbite, and loss of dexterity.

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    Level C PPE

    A type of PPE level where a full face or half face air purifying respirator is necessary, along with chemical-resistant clothing and other PPE. It's used when the contaminant is known and will not be absorbed through the skin.

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    Occupational Exposure Limit (OEL)

    The maximum concentration of a hazardous substance in the workplace a worker can be exposed to daily without adverse health effects.

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    Permissible Exposure Limit (PEL)

    A type of OEL set by OSHA as a mandatory limit for workplace exposures.

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    Threshold Limit Value (TLV)

    A type of OEL recommended by the American Conference of Governmental Industrial Hygienists (ACGIH) as a safety standard.

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    TLV-TWA (Time Weighted Average)

    A type of TLV that represents the average exposure limit over an 8-hour workday and 40-hour workweek.

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    TLV-STEL (Short Term Exposure Limit)

    A type of TLV that allows for short bursts of higher exposure, limited to 15 minutes at a time, with at least 1 hour between exposures.

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    TLV- Ceiling

    A type of TLV that restricts any exposure, even for a moment, to a certain level.

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    IDLH (Immediately Dangerous to Life and Health)

    An exposure level considered to be immediately dangerous to life or health.

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    SCBA (Self Contained Breathing Apparatus)

    A protective device that provides independent breathing air for a limited duration.

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    Positive Pressure SCBA

    A type of SCBA where the air pressure inside the hood is higher than the outside air pressure.

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    Negative Pressure SCBA

    A type of SCBA where the air pressure inside the hood is lower than the outside air pressure.

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    Study Notes

    Occupational Exposure Limits

    • OEL (Occupational Exposure Limit): The maximum concentration of a hazardous substance in the workplace that a worker can be exposed to daily without adverse effects.
    • PEL (Permissible Exposure Limit): A mandatory exposure limit set by OSHA.
    • TLV (Threshold Limit Value): A recommended exposure limit set by ACGIH (American Conference of Governmental Industrial Hygienists).
    • REL (Recommended Exposure Limit): A recommended exposure limit set by NIOSH (National Institute for Occupational Safety and Health).
    • TLV Types:
      • TLV-TWA (Time-Weighted Average): 8-hour average exposure limit over an 8-hour workday and a 40-hour workweek.
      • TLV-STEL (Short-Term Exposure Limit): 15-minute exposure limit, repeated a maximum of 4 times per day with at least 1 hour between exposures.
      • TLV-Ceiling: The concentration should not be exceeded at any time during the workday.
    • H2S (Hydrogen Sulfide):
      • TWA: 1 ppm
      • STEL: 5 ppm
      • TLV-Ceiling: 20 ppm
      • IDLH (Immediately Dangerous to Life and Health): 100 ppm (for H2S)
    • PPM: Unit used for measuring chemical concentration (parts per million).
    • SCBA (Self-Contained Breathing Apparatus):
      • Types:
        • Positive Pressure: Pressure inside the hood is higher than the outside pressure.
        • Negative Pressure: Pressure inside the hood is lower than the outside pressure.

    Other Topics

    • Open-Type SCBA (Emergency Escape Breathing Apparatus): Exhaled air is not processed.
    • Closed-Type SCBA: Exhaled air is processed and reused.
    • Airline Breathing Apparatus: Used for long work durations, connected to a cylinder cascade system.
    • Maximum Hose Line for Air Line BA: 300 ft (90 meters) maximum.
    • Fit Tests:
      • Qualitative: Subjective, relying on the user's sense of smell.
      • Quantitative: Numerical, instruments used to assess the leak.
    • Vibration:
      • HAVS (Hand-Arm Vibration Syndrome): Symptoms include white fingers, blanching, numbness. Related to Carpal Tunnel Syndrome (MSD).
      • WBVS (Whole Body Vibration Syndrome): Affects the spinal cord, common among flight attendants.
      • Raynaud's Phenomenon: Reduced blood flow to fingers, often triggered by cold or vibration.
      • Measuring Vibration: Accelerometer or vibrometer.
    • Personal Protective Equipment (PPE):
      • Level A: Highest skin and respiratory protection. EG: Positive pressure SCBA, totally encapsulating suit.
      • Level B: Highest respiratory protection, with less skin protection required. Positive pressure SCBA, chemical hood.
      • Level C: Specific substance concentration is known. Full face or half-face respirator, chemical hood, protective clothing.
      • Level D: A work uniform.
      • OSHA PPE Level: Level A has the highest skin protection.
    • Best Gloves for Acetic Acid: Neoprene, Natural Latex, Butyl, or Nitril Latex.
    • CTD (Cumulative Trauma Disorder): Long-term musculoskeletal injuries due to repetitive tasks. Examples include Carpal Tunnel Syndrome and WRULD (Work-Related Upper Limb Disorder).
    • Ergonomics: Designing workplaces and products to fit the user for better efficiency and safety, considers anthropometric data, 95% of population.
    • Anthropometry: Study of human body sizes.
    • Epidemiology: The study of how humans get diseases (prevention, research, cure).
    • Heat Stress:
      • Hypothermia: Low body temperature.
      • Hyperthermia: High body temperature
      • Causes: Dehydration, heat stress, heat rash, heat exhaustion, heat syncope, heat stroke.
    • WBGT (Wet Bulb Globe Temperature): Measures environmental factors affecting deep body temperature.
    • NIOSH Lifting Equation: Not recommended.
    • NIOSH Lifting Index: A method for assessing lifting risks accurately.
    • Chemical Effects:
      • Additive: Combined effect of two or more chemicals is equal to the sum of individual effects.
      • Antagonism: Combined effect of two or more chemicals is less toxic than the individual effects.
      • Potentiation: One chemical makes another more toxic, even if the first chemical itself has no direct toxicity.
      • Synergism: Combined effect is greater than the sum of the individual chemical effects.

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    Related Documents

    CSP Work Shop- Occupational Health & Ergonomics PDF

    Description

    Test your knowledge of Occupational Exposure Limits (OELs) and related concepts such as PEL, TLV, and REL. This quiz covers definitions, types of limits, and specific examples like H2S. Strengthen your understanding of workplace safety regulations and standards.

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