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Continuing Education — "The Action Level!®"

VOLUME 5(12), December 2008
Journal of Occupational and Environmental Hygiene

Answer the questions below and click "Submit".

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CASE STUDIES:

Differentiating Non-Asbestiform Amphibole and Amphibole Asbestos by Size Characteristics
Martin Harper, Eun Gyung Lee, Stacy S. Doorn and Okisha Hammond

1. Cleavage fragments of coarsely crystalline minerals with the
    composition of asbestos are regulated by OSHA or MSHA
    when they meet the dimensional criteria of a fiber (length
    > 5 micrometers and aspect ratio > 3:1). True or False?

True
False
2. The majority of OSHA/MSHA regulated airborne amphibole
    asbestos fibers are:
a. shorter than 5 micrometers
b. between 5 and 10 micrometers long
c. longer than 10 micrometers
Equipment, Exposure, Emission Review – Specification of Process Equipment for Worker Exposure Control
Stephen M. Bowes, III

3. It is too expensive to involve a site industrial hygienist in
    the design of new or modified process units. True or False?

True
False
4. The Equipment, Exposure, Emission Review uses what
    information to match process equipment to the hazard
    of a stream?
a. Occupational exposure limit, stream concentration
b. European R Phrases
c. OSHA Hazcom health hazard definitions
d. None of the above
Seasonal Variability of Culturable Fungal Genera in the House Dust of Inner-City Residences
Sook Ja Cho, Gurumurthy Ramachandran, Sudipto Banerjee, Andrew D. Ryan and John L. Adgate

5. Dust samples for culturable fungi were taken from floors of
    residential homes in Minneapolis, MN over a 1-year period
    of study. The most frequently occurring fungus at the genus
    level during the study period was:

a. Cladosporium
b. Aspergillus
c. Penicillium
d. Alternaria
6. Within home to between home variance ratios of fungal
    genera expressed as concentration (CFU/g) were larger
    than that of total fungi. True or False?
True
False
Exposure to Ultrafine Particles in Asphalt Work
Karine Elihn, Bente Ulvestad, Siri Hetland, Anna Wallén and Britt Grethe

7. Which occupational exposure limit (OEL) was exceeded
    during asphalt paving?

a. oil mist
b. NO2
c. total dust
d. ultrafine particles
8. What was the percentage of ultrafine particles during
    asphalt paving and where did most of those particles
    originate from?
a. 24% of the particles was ultrafine,
          mainly originating from diesel exhaust
          fumes of passing cars/trucks.
b. 74% of the particles was ultrafine,
          mainly originating from diesel exhaust
          fumes of passing cars/trucks.
c. 24% of the particles was ultrafine,
          mainly originating from asphalt fumes.
d. 74% of the particles was ultrafine,
          mainly originating from asphalt fumes.
Systematic Literature Review of Uses and Levels of Occupational Exposure to Tetrachloroethylene
Laura S. Gold, Anneclaire J. DeRoos, Martha Waters and Patricia Stewart

9. In which industry has Tetrachloroethylene most commonly
    been used?

a. Metal fabrication
b. Dry cleaning
c. Aircraft manufacturing
d. Printing/publishing
10. This review identified multiple instances of overexposure
      (according to OSHA standards) to PCE. True or False?
True
False
A Wide Range of Activity Duration Cutoffs Provided Unbiased Estimates of Exposure to Computer Use
Che-hsu Chang, Peter W. Johnson and Jack T. Dennerlein

11. Combined with exposure durations estimated by usage
      monitor, which exposure assessment approach could help
      determine the important physical exposure factors?

a. Task based exposure estimates
b. Longitudinal exposure assessment
c. Personal exposure monitoring
12. If we are to choose one unified value for activity duration
      cutoff, what would it be?
a. 2 seconds
b. 15 seconds
c. 30 seconds
d. 60 seconds
Real-time PCR Quantification of Mycobacterium immunogenum in Used Metalworking Fluids
M. Veillette, G. Pagé, P.D. Thorne and C. Duchaine

13. The bacterial species Mycobacterium immunogenum
      implicated in hypersensitivity pneumonitis in metalworking
      fluids was previously described as Mycobacterium fortuitum.
      True or False?

True
False
14. Concerning Mycobacterium immunogenum in metalworking
      fluids, what is not influenced by the viability or culturability
      state?
a. Infectivity
b. Immunogenic properties
c. Biocide resistance


Deadline for answers is December 31, 2008.

Answers will be available online at
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on January 12, 2009.

 
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