Podcast
Questions and Answers
What is the most common occupational disease?
What is the most common occupational disease?
- Asbestosis
- Dermatitis (correct)
- Siderosis
- Glanders
Which occupational disease is most likely caused by exposure to petroleum products, grease, and solvents?
Which occupational disease is most likely caused by exposure to petroleum products, grease, and solvents?
- Dermatitis (correct)
- Siderosis
- Carpal Tunnel syndrome
- Glanders
Which statement best describes Cumulative Trauma Disorders (CTD)?
Which statement best describes Cumulative Trauma Disorders (CTD)?
- Disorders caused as a result of repeated movement of body parts (correct)
- Disorders caused by chemical exposure over a long period
- Mental disorders developed from work-related stress
- Any physical or psychological disorder that is work-related
What is the Li Index (LI) for lifting a 22lb weight if the NIOSH recommended Weight Limit (RWL) is 16lb?
What is the Li Index (LI) for lifting a 22lb weight if the NIOSH recommended Weight Limit (RWL) is 16lb?
What does a pocket dosimeter measure exposure to?
What does a pocket dosimeter measure exposure to?
What is the volume fraction of CO2 in a container with dimensions of 20 x 20 x 10 feet releasing 18.9 3 of CO2?
What is the volume fraction of CO2 in a container with dimensions of 20 x 20 x 10 feet releasing 18.9 3 of CO2?
How does an increase in air velocity affect heat stress?
How does an increase in air velocity affect heat stress?
Dilution ventilation is best suited for which situation?
Dilution ventilation is best suited for which situation?
Which type of exposure is typically most associated with dermatitis?
Which type of exposure is typically most associated with dermatitis?
Which of the following is NOT a factor in Cumulative Trauma Disorders (CTD)?
Which of the following is NOT a factor in Cumulative Trauma Disorders (CTD)?
What is the concentration of solvent vapor in a room after two hours under STP conditions?
What is the concentration of solvent vapor in a room after two hours under STP conditions?
Which factor is most important when designing a local exhaust system?
Which factor is most important when designing a local exhaust system?
What is the noise dose for a worker exposed to a 95dBA source for 5 hours?
What is the noise dose for a worker exposed to a 95dBA source for 5 hours?
What is the noise dose in percentage for a worker exposed to specified noise levels in a machine shop?
What is the noise dose in percentage for a worker exposed to specified noise levels in a machine shop?
The cochlea is an essential component of which part of the ear?
The cochlea is an essential component of which part of the ear?
Which statement about Noise Induced Hearing Loss (NIHL) is generally true?
Which statement about Noise Induced Hearing Loss (NIHL) is generally true?
Radioisotopes of a material are characterized by which condition?
Radioisotopes of a material are characterized by which condition?
If the half-life of Radon 222Rn86 is 3.8 days, how many days to reduce 1 gram to 1/16 of a gram?
If the half-life of Radon 222Rn86 is 3.8 days, how many days to reduce 1 gram to 1/16 of a gram?
What level of radiation can be expected at 6 feet away from a source emitting 0.06 rem at 2 feet?
What level of radiation can be expected at 6 feet away from a source emitting 0.06 rem at 2 feet?
Flashcards
What is the most common occupational disease?
What is the most common occupational disease?
The most common occupational disease, often caused by exposure to petroleum products, grease, and solvents.
What are Cumulative Trauma Disorders (CTDs)?
What are Cumulative Trauma Disorders (CTDs)?
Cumulative Trauma Disorders (CTDs) are caused by repetitive movements of body parts, leading to pain, discomfort, and inflammation.
How is the Li Index (LI) calculated when lifting a weight?
How is the Li Index (LI) calculated when lifting a weight?
The Li Index (LI) measures the risk associated with lifting a specific weight compared to the NIOSH Recommended Weight Limit (RWL). An LI of 1.375 indicates the weight lifted is 1.375 times the recommended limit.
What does a pocket dosimeter measure?
What does a pocket dosimeter measure?
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What is volume fraction?
What is volume fraction?
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How does air velocity affect heat transfer?
How does air velocity affect heat transfer?
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When is dilution ventilation most effective?
When is dilution ventilation most effective?
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What is evaporation rate?
What is evaporation rate?
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Ventilation Rate
Ventilation Rate
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Concentration
Concentration
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Inverse Square Law of Radiation
Inverse Square Law of Radiation
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Local Exhaust System
Local Exhaust System
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Noise Dose
Noise Dose
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Cochlea
Cochlea
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Noise-Induced Hearing Loss (NIHL)
Noise-Induced Hearing Loss (NIHL)
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Radioisotopes
Radioisotopes
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Half-Life
Half-Life
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Rem (Roentgen equivalent man)
Rem (Roentgen equivalent man)
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Study Notes
Occupational Health and Ergonomics Q&A
- Occupational Disease: Dermatitis is the most common occupational disease.
- Occupational Disease Cause: Exposure to petroleum products, grease, and solvents is the most probable cause of dermatitis.
- Cumulative Trauma Disorders (CTD): CTDs are disorders resulting from repeated movements of body parts over a prolonged period.
- Lift Index (LI): If the NIOSH recommended weight limit (RWL) is 16lb, and the weight lifted is 22lb, the lift index is 1.375.
- Pocket Dosimeter: A device used to measure employee exposure to radiation, noise, vibrations, and airborne hazardous chemicals.
Radiation Measurement
- Radiation Measurement: A pocket dosimeter is used to measure employee exposure.
- Airborne Concentration Calculation : If a container measures 20 x 20 x 10 feet and contains 18.9 ft3 of CO2 released into the container, volume fraction of CO2 is 0.006.
Ventilation
- Dilution Ventilation: Best suited when air contaminants are not highly flammable or toxic and are not produced at high rates.
- Heat Stress: Increasing air velocity increases heat transfer rates by convection.
Noise Dose
- Noise Dose Calculation: If a worker is exposed to 95dBA sound for 5 hours, the noise dose is 125%.
Hearing Loss
- Cochlea: The primary part of the inner ear.
- Noise-Induced Hearing Loss (NIHL): High-frequency noise is more damaging than low-frequency noise; NIHL depends on both sound intensity and exposure time.
Radioactive Decay
- Radioisotopes: Radioisotopes of a given material have the same atomic number but different atomic masses
- Half-Life Calculation: Radon-222 (222Rn86) half-life is 3.8 days; it will take 15.2 days for one gram of radon to reduce to 1/16 of a gram.
- Radiation Measurement at Different Distances: At 2 feet from the source, radiation measurement is 0.06 rem; at 6 feet, it is 0.02 rem.
Erythema & Other Conditions
- Erythema Cause: Caused by overexposure to sunlight.
- Scotoma: A loss of vision in a portion of the visual field, primarily due to non-ionizing radiation exposure, especially Microwave.
Asphyxiant
- Simple Asphyxiant: Chemicals that interfere with normal hemoglobin function or reduce oxygen concentration, causing suffocation in the body.
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