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Continuing Education — "The Action Level!®"

VOLUME 5(3), March 2008
Journal of Occupational and Environmental Hygiene

Answer the questions below and click "Submit".

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CASE STUDIES:

Comparison of the TSI Model 8520 and Grimm Series 1.108 Portable Aerosol Instruments Used to Monitor Particulate Matter in an Iron Foundry
Yu-Hsiang Cheng

1. To acquire accurate quantitative measurements of aerosol
    concentrations, direct-reading dust monitors should be calibrated
    against standard gravimetric methods with the target dust under
    the same working conditions. True or False?

True
False
2. The responses of light scattering dust monitors are influenced by
    aerosol parameters such as particle shape, density and size
    as well as refractive index. True or False?
True
False
Asbestos Exposures of Mechanics Performing Clutch Service on Motor Vehicles
Howard J. Cohen and Drew R. Van Orden

3. According to this research, asbestos time-weighted average
    exposures (8-hour samples) for mechanics servicing automotive
    clutches are:

a. less than those of mechanics servicing brakes.
b. similar to those of mechanics servicing brakes.
c. greater than those of mechanics servicing brakes.
4. Asbestos exposures of mechanics servicing clutches:
a. exceed the OSHA PEL for the duration of time
          that they are performing this activity.
b. exceed the 8-hr TWA OSHA PEL.
c. are much less than the OSHA PEL.
Analysis of Non-Standard Noise Dosimeter Microphone Positions
David Byrne and Efrem Reeves

5. For noise exposure measurements, the most commonly accepted
    microphone placement location is at a point midway between
    the base of the neck and the tip of the shoulder with the microphone
    pointing upward. True or False?

True
False
6. In a work area lacking acoustically reflective surfaces (e.g., an
    outdoor construction site), microphone placement effects are
    generally regarded as negligible irrespective of variables such as
    microphone and body position, sound source location and nature
    of the noise spectrum. True or False?
True
False
Evaluating Ergonomic Stresses in North Carolina Commercial Crab Pot and Gill Net Fishermen
Kristen Kucera, Gary Mirka, Dana Loomis, Stephen Marshall, Hester Lipscomb and Julie Daniels

7. Handling heavy loads comprised a large percentage of overall
    work time and produced high peak compression and high NIOSH
    lifting index values in crab pot and gill net commercial fishing.
    True or False?

True
False
8. In this study, Posture, Activity, Tools and Handling (PATH)
    results provided greater ________________ while Continuous
    Assessment of Back Stress (CABS) results provided greater
    _______________ precision and detail.
a. depth, fishing
b. reliability, epidemiology
c. generalizability, biomechanical
d. knowledge, statistical
A Survey of Airborne and Skin Exposures to Chemicals in Footwear and Equipment Factories in Thailand
Lori Todd, Kathleen Mottus and Gary Mihlan

9. Surface and skin sampling are preferred over air sampling in
    these footwear factories because:

a. air determinations of isocyanates are always
          inaccurate.
b. dermal exposures predominate.
10. The authors identify the most important challenge of performing
      personal air sampling and evaluating exposures in footwear
      and equipment factories as that of:
a. workers being unwilling to wear air sampling
          monitors.
b. the proprietary nature of individual products.
c. workers being exposed to complex multi-chemical
          mixtures.
Biomarkers of Environmental and Workplace Boron Exposure
Xiaoru Xing, Guoping Wu, Fusheng Wei, Ping Liu, Hu Wei, Chunli Wang, Jun Xu, Lin Xun, Juan Jia, Nola Kennedy, David Elashoff and Wendie Robbins

11. The authors found that blood, semen and post-shift urine
      concentrations correlated with total boron exposure. Hence,
      they chose post-shift urine samples as useful markers of
      total workplace exposure because:

a. urine is relatively easy to collect.
b. urine collection is relatively non-invasive.
c. post shift urine had the most consistent
          correlation with total exposure compared to
          blood and semen.
d. All of the above
e. Only c
12. In the study, what steps did the researchers take to avoid
      environmental borate contamination during collection of
      biological and food/fluid samples?
a. Collection of biological samples occurred in a
          setting away from the worksite.
b. Participants removed contaminated clothing prior
          to collection of biological samples.
c. Time that food containers were open to the air
          during sample collection was minimized.
d. All of the above
e. Only a and b
Perception and Attitudes of Fire Fighters on Noise Exposure and Hearing Loss
Oisaeng Hong, Daniel Samo, Rebecca Hulea and Brenda Heekin

13. The design of this study could best be characterized by which
      of the following terms:

a. qualitative
b. semi-quantitative
c. quantitative
14. Firefighters' fears that insert-type hearing protectors would melt
      in the ear canal during most fire scenarios appears theoretically:
a. reasonable
b. unlikely
c. no reasoning provided in the article


Deadline for answers is March 31, 2008.

Answers will be available online at
http://www.acgih.org/products/joeh/alanswers.htm
on April 14, 2008.

 
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