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Questions and Answers
What is the concentration of solvent vapor in a room after two hours, given a ventilation rate of 1,500 3/min under STP conditions?
What is the concentration of solvent vapor in a room after two hours, given a ventilation rate of 1,500 3/min under STP conditions?
When designing a local exhaust system, which of the following is crucial?
When designing a local exhaust system, which of the following is crucial?
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?
In a machine shop, how is the total noise dose calculated based on different noise levels and exposure times?
In a machine shop, how is the total noise dose calculated based on different noise levels and exposure times?
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The cochlea is primarily associated with which part of the ear?
The cochlea is primarily associated with which part of the ear?
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Which statement is true regarding Noise Induced Hearing Loss (NIHL)?
Which statement is true regarding Noise Induced Hearing Loss (NIHL)?
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What distinguishes the radioisotopes of a given material capable of radioactive decay?
What distinguishes the radioisotopes of a given material capable of radioactive decay?
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If the half-life of Radon 222 is 3.8 days, how many days would it take to reduce one gram to 1/16 of a gram?
If the half-life of Radon 222 is 3.8 days, how many days would it take to reduce one gram to 1/16 of a gram?
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At a distance of 6 feet, what level of radiation would be expected if 0.06 rem is measured at 2 feet from the source?
At a distance of 6 feet, what level of radiation would be expected if 0.06 rem is measured at 2 feet from the source?
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Which occupational disease is most commonly associated with skin exposure?
Which occupational disease is most commonly associated with skin exposure?
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Which condition is primarily caused by repeated movements of body parts?
Which condition is primarily caused by repeated movements of body parts?
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What does a pocket dosimeter primarily measure in a workplace?
What does a pocket dosimeter primarily measure in a workplace?
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Calculate the Li Index when lifting a weight of 22lbs with an NIOSH recommended Weight Limit of 16lbs.
Calculate the Li Index when lifting a weight of 22lbs with an NIOSH recommended Weight Limit of 16lbs.
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What is the primary purpose of dilution ventilation?
What is the primary purpose of dilution ventilation?
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In the scenario of increased room air velocity, what happens to heat transfer rates?
In the scenario of increased room air velocity, what happens to heat transfer rates?
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If a container with nitrogen has a CO2 release of 18.9 cubic feet, what is the volume fraction of CO2?
If a container with nitrogen has a CO2 release of 18.9 cubic feet, what is the volume fraction of CO2?
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Which occupational disease is primarily linked to long-term chemical exposure?
Which occupational disease is primarily linked to long-term chemical exposure?
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When diluting air contaminants, what type of contaminants is this method effective for?
When diluting air contaminants, what type of contaminants is this method effective for?
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What does the presence of carpal tunnel syndrome indicate?
What does the presence of carpal tunnel syndrome indicate?
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Study Notes
Occupational Health and Ergonomics Q&A
- Question 1: The most common occupational disease is dermatitis.
- Question 2: Exposure to petroleum products, grease, and solvents is the most probable cause of dermatitis.
- Question 3: Cumulative Trauma Disorders (CTDs) are disorders caused by repeated movement of body parts, having a cumulative effect over a given time period.
- Question 4: The Lift Index (LI) for lifting a 22lb weight with a recommended Weight Limit of 16lb is 1.375.
- Question 5: A pocket dosimeter measures employee exposure to radiation.
- Question 6: If 18.9 ft³ of carbon dioxide (CO2) is released into a 20 x 20 x 10 feet container filled with nitrogen, the concentration expressed in volume fraction is 0.006.
- Question 7: Increasing air velocity increases heat transfer by convection when controlling heat stress.
- Question 8: Dilution ventilation is best suited for situations where air contaminants are not highly flammable or toxic and are not produced at high rates.
- Question 9: If a solvent evaporates at a rate of 0.9 ft³/min in a 20 x 15 x 10 ft room with a ventilation rate of 1,500 ft³/min, the concentration of solvent vapor after two hours is 0.06 ppm.
- Question 10: When designing/operating a local exhaust system, the design should aim to remove all emitted contaminants and the exhaust airflow rate should be proportionate to contaminant generation.
- Question 11: A worker exposed to 95dBA noise for 5 hours will have a noise dose of 125%.
- Question 12: The noise dose expressed as a percentage of OSHA permissible exposure is not provided in the text. A table of dB levels and durations is given, however.
- Question 13: The cochlea is a part of the inner ear.
- Question 14: The question about noise-induced hearing loss is missing from the text.
- Question 15: High frequency noise is more damaging than low frequency noise regarding NIHL (Noise-Induced Hearing Loss).
- Question 16: Radioisotopes of a given material, capable of radioactive decay, have the same atomic number but different atomic masses.
- Question 17: It will take 19 days to reduce the weight of Radon 222 to 1/16th of a gram if its half-life is 3.8 days.
- Question 18: At 6 feet away from the source, the expected radiation level would be 0.02 rem if the radiation emitted at 2 feet is 0.06 rem.
- Question 19: Geiger-Mueller instruments are suitable for measuring all of the ionizing radiation types mentioned (gamma, alpha, and beta).
- Question 20: Erythema is caused by overexposure to sunlight.
- Question 21: Scotoma, loss of vision in a portion of the visual field, is most likely caused by exposure to infrared radiation.
- Question 22: Simple asphyxiants interfere with normal hemoglobin function, depriving the body of oxygen, or cause suffocation by reducing oxygen concentration. Inert gases can become reactive with blood.
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Test your knowledge on occupational health and ergonomics with this quiz. It covers various topics including diseases, exposure risks, and effective safety measures. Ideal for students and professionals in health and safety fields.
