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Continuing Education — "The Action Level!®"

VOLUME 5(1), January 2008
Journal of Occupational and Environmental Hygiene

Answer the questions below and click "Submit".

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CASE STUDIES:

WBGT Clothing Adjustment Factors for Four Clothing Ensembles and the Effects of Metabolic Demands
Thomas E. Bernard, Victor Caravello, Skai W. Schwartz and Candi D. Ashley

1. In comparing Clothing Adjustment Factors, lower values were found
    for _______ fibers.

a. natural
b. synthetic
2. Clothing adjustment factors can best be described as sensitive
    to metabolic adjustment factors. True or False?
True
False
Effects of Hoods and Flame Retardant Fabrics on WBGT Clothing Adjustment Factors
Candi D. Ashley and Thomas E. Bernard

3. The ACGIH® WBGT Index was developed with the assumption that
    ________ fabrics are worn.

a. cotton
b. synthetic
4. Metabolic rate is a possible confounder for studies of this nature.
    The best conclusion to be reached from the present data is
    that metabolic rate is adequately controlled. True or False?
True
False
Adequacy of Benzo(a)pyrene and Benzene Soluble Materials as Indicators of Exposure to Polycyclic Aromatic Hydrocarbons
Melissa C. Friesen, Paul A. Demers, John J. Spinelli and Nhu D. Le

5. Which of the following best takes into account aggregated dose
    from inhalation and dermal exposures?

a. a wipe test
b. air sample
c. biological monitoring
6. These authors recommend broad application of their exposure
    surrogates to other smelters. True or False?
True
False
Issues When Modeling Benzene, Toluene and Xylene Exposures Using a Literature Database
Misty J. Hein, Martha A. Waters, Edwin van Wijngaarden, James A. Deddens and Patricia A. Stewart

7. Similar to cohort studies, methods for assessing exposures in
    population or hospital based case control studies have been based
    on objective, well documented procedures. True or False?

True
False
8. Differences in results of epidemiologic studies are due to variability
    among populations. True or False?
True
False
Statistical Methods for Establishing Equivalency of Several Sampling Devices
K. Krishnamoorthy and Thomas Mathew

9. The statistical tests described in this article are useful to:

a. compare several alternative devices to the
          standard
b. compare several alternative devices among
          themselves
c. identify the devices that are not equivalent to
          the standard
d. all of the above
10. Results of this article are based on the assumption that the
      log transformed measurements follow a multivariate normal
      distribution. True or False?
True
False
Laboratory and Field Testing of Sampling Methods for Inhalable and Respirable Dust
Markku Linnainmaa, Juha Laitinen, Ari Leskinen, Olli Sippula and Pentti Kalliokoski

11. Filtering efficiency of the respirable foam was found to be increased
     remarkably by dust loads exceeding:

a. 4 mg
b. 6 mg
c. 10 mg
12. According to the results obtained in the study that is the subject
     of this article, both inhalable and respirable dust can reliably
     be measured simultaneously by the IOM foam sampler. True
     or False?
True
False
Assessing Total Fungal Concentrations on Commercial Passenger Aircraft Using Mixed-Effects Modeling
Lauralynn Taylor McKernan, Misty J. Hein, Kenneth M. Wallingford, Harriet Burge and Robert Herrick

13. The highest fungal exposures were recorded during which phase:

a. boarding and deplaning
b. mid-flight
c. landing
d. none of the above
14. The primary advantage of mixed-effects modeling is that it
     allows an analysis of repeated measurements from individuals/
     locations and takes into account the potential dependencies
     among the repeated measures. True or False?
True
False
A Cross-Industry Assessment of Personal Exposures to Methyl Methacrylate
Gordon Vos and John Paul Stephens

15. MMA monomer use in the manufacture of other products
     resulted in the highest exposure distributions, with lower exposures
     associated with monomer production, maintenance and distribution
     operations. True or False?

True
False
16. The use of distribution free box and whisker plots was employed
      in this article to facilitate comparison of various exposure
      distributions. The use of median values as the mid-line parameter
      in the box construction was most likely chosen since it is:
a. a measure of central tendency that is less affected
         by statistical outliers or extremes than other
         potential values (such as the mean).
b. a distribution free statistic that is commonly used
         in the construction of box and whisker plots.
c. works well with the use of non parametric
         percentiles/quartiles for box and whisker
         plot construction in illustrating the variability
         of a distribution.
d. all of the above


Deadline for answers is January 31, 2008.

Answers will be available online at
http://www.acgih.org/products/joeh/alanswers.htm
on February 11, 2008.

 
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