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Continuing Education — "The Action Level!®"

VOLUME 2(10), October 2005
Journal of Occupational and Environmental Hygiene

Answer the questions below and click "Submit".

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CASE STUDIES:

A Proposed Methodology for Setting Occupational Exposure Limits for Hydrocarbon Solvents
Richard H. McKee, Arlean M. Medeiros, and Wayne C. Daughtrey

1. The Reciprocal Calculation Procedure (RCP) is a method to:

a. Estimate the most significant source of exposure.
b. Calculate a TLV® or exposure limit for mixtures
          of chemicals that have the same or similar critical
          effects.
c. Calculate a TLV® or exposure limit for a
          combination of chemicals that have different
          critical effects.
2. The methodology in the article applies to:
a. Aliphatic hydrocarbon solvents in the carbon range
          of C5-C15.
b. Aromatic hydrocarbon solvents in the carbon range
          of C7-C15.
c. All of the above.
d. None of the above.
Occupational Exposure to Airborne Asbestos from Phenolic Molding Material (Bakelite) During Sanding, Drilling, and Related Activities
Fionna Mowat, Michael Bono, R.J. Lee, Susan Tamburello, and Dennis Paustenbach

3. OSHA does not require a warning or caution label to be placed on
    a product if:

a. The product has less than 2% asbestos by weight.
b. The product is sold only in small quantities to
          specialty stores.
c. The asbestos in the product has been modified by
          a bonding agent, coating, binder, or other material.
d. The type of asbestos used in the product is
          exclusively chrysotile.
4. Due to the encapsulation of asbestos fibers in a solid matrix,
    significantly lower airborne concentrations of asbestos fibers are
    expected to be present during manipulation of most of these
    products compared with handling raw asbestos fibers.
    True or False?
True
False
A Hematology Surveillance Study of Petrochemical Workers Exposed to 1,3 Butadiene
Shan P. Tsai, Farah S. Ahmed, Jerry D. Ransdell, Judy K. Wendt, and Robin P. Donnelly

5. The OSHA permissible exposure limit (PEL) for butadiene decreased
    from 1000 ppm to the 8 hour time weighted average (TWA-8)
    of _____ in 1996.

a. 0.1 ppm
b. 0.5 ppm
c. 1.0 ppm
d. 2.0 ppm
6. The current study required that employees have a normal first exam
    for the cell type being analyzed. Excluding employees who were
    abnormal at their first exam allows the assessment of the
    ____________ from normal to abnormal.
a. mortality rate
b. morbidity rate
c. rate of change
d. rate of hematotoxicity
Test for the Integrity of Environmental Tractor Cab Filtration Systems
Ernest S. Moyer, William A. Heitbrink, and Paul A. Jensen

7. Leakage into the tractor cabs occurred because:

a. The workers left the doors open.
b. The cab windows had cracks.
c. There were small holes in the duct connecting
          the filter to the fan's inlet.
d. All of the above.
8. In ASAE standard S525, aerosol penetration is measured at which
    size during mobile testing:
a. Maximum penetrating particle size.
b. 0.3 to 0.5 µm.
c. 0.5 to 1.0 µm.
d. 2 to 4 µm.
Ultraviolet Radiation Exposure from UV-Transilluminators
Farhang Akbar-Khanzadeh and Mahdi Jahangir-Blourchian

9. The UV Actinic Hazard detector head used in this study is
    preprogrammed to alphanumerically display units in
    __________________ with a spectral range of 200-400 nm
    and peak at 274 nm.

a. Black light
b. Effective irradiance
c. UV-B and UV-C
d. Germicide UV
10. The allowable exposure time for the instruments studied was less
      than 20 seconds within _______ from the UV transilluminators' filter
      surface.
a. 15 cm (6 in)
b. 25 cm (10 in)
c. 50 cm (20 in)
d. 100 cm (40 in)


Deadline for answers is October 31, 2005.

Answers will be available online at
http://www.acgih.org/products/joeh/alanswers.htm
on November 14, 2005.

 
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