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Continuing Education — "The Action Level!®"

VOLUME 8(12), December 2011
Journal of Occupational and Environmental Hygiene


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CASE STUDIES:

Hood Entry Coefficients of Compound Exhaust Hoods
Crescente E. Figueroa

1. The model introduced in this study applies to a compound
    hood configuration. The intended application of this model is
    which of the following?

a. The computation of pressure losses by
          considering multiple hood fittings designed
          to distribute and regulate air flow
b. The computation of volumetric flow rate from
          a hood static pressure measurement
c. The computation of volumetric flow rate from
          estimates of velocity pressure in hood fittings that
          distribute and regulate air flow
d. The computation of hood static pressure from
          duct velocity pressure measurements
e. The description of hood entry losses
2. What was a condition assumed in the derivation of the
    model presented in this study?
a. pressure drop devices (singularities) that are
          used to distribute, regulate or direct flow inside a
          hood must be limited to three
b. the slot loss factor is a function of the slot width
c. velocity pressure in all hood singularities must
          be known
d. as the air passes through hood singularities,
          the maximum value of velocity is attained in the
          connecting duct hood static pressure
e. values must not exceed 3.0 cm of water gauge
Laboratory Study to Assess Causative Factors Affecting Temporal Changes in Filtering Facepiece Respirator Fit: Part I – Pilot Study
Ziqing Zhuang, Stacey Benson, Stephanie Lynch, Andy Palmiero and Raymond Roberge

3. The OSHA Respiratory Protection Standard (29 CFR
    1910.134) requires respirator users to receive training
    and pass a fit test before using a respirator, and annually
    thereafter. True or False?

True
False
4. For the same respirator and user, fit factors for different
    donnings can be presumed to be the same. True or False?
True
False
Inter-Rater Reliability of Assessed Prenatal Maternal Occupational Exposures to Solvents, Polycyclic Aromatic Hydrocarbons, and Heavy Metals
Carissa M. Rocheleau, Christina C. Lawson, Martha A. Waters, Misty J. Hein, Patricia A. Stewart, Adolfo Correa, Diana Echeverria and Jennita Reefhuis

5. Why might researchers choose not to use expert exposure
    assessment in retrospective studies, compared to a JEM
    or self-reported exposure?

a. Expert assessment is expensive.
b. Expert assessment is time-consuming.
c. Expert assessment is less accurate.
d. Both a and b
6. When evaluating exposure to chlorinated solvents, expert
    raters agreed most [as measured by kappa coefficient] on
    exposure ratings for which occupations?
a. Farming, fishing, and forestry
b. Architecture and engineering
c. Construction and extraction (gas, oil, mining)
d. Buildings and grounds cleaning and maintenance
Acute Treatment with Kerosene Damages the Dermal Barrier and Alters the Distribution of Topically Applied Benzo(a)pyrene in Mice
Kathy LaDow, Brenda L. Schumann, Nicole Luse, Dave Warshawsky, William L. Pickens, Steven B. Hoath and Glenn Talaska

7. Which of the following occurred when carcinogen treated
    skin was cleaned with kerosene (indicate all that apply)?

a. Skin water permeability decreased
b. Skin water permeability increased
c. Carcinogen distribution to internal organs
          was enhanced
d. Carcinogen distribution to internal organs
          was reduced
e. a and d
f. b and c
8. Washing the skin with kerosene enhanced the distribution
    of benzo(a)pyrene to which two internal organs?
a. liver and lung
b. lung and kidney
c. liver and kidney
d. kidney and bladder
Desktop Study of Occupational Exposure Judgments: Does Education and Experience Influence Accuracy?
Perry W. Logan, Gurumurthy Ramachandran, John R. Mulhausen, Sudipto Banerjee and Paul Hewett

9. Higher Data Interpretation Test (DIT) Score appeared to
    correlate with higher qualitative exposure judgment percent
    correct scores for participants with less than 10 years of
    exposure assessment experience. True or False?

True
False
10. Based on the data presented in this study, which
      statement is most accurate?
a. Participants with a higher Data Interpretation
          Test (DIT) Score had lower quantitative exposure
          judgment percent correct scores.
b. Participants with a higher Data Interpretation
          Test (DIT) Score had higher quantitative exposure
          judgment percent correct scores.
c. There was no statistical correlation between
          Data Interpretation Test (DIT) Score and
          quantitative exposure judgment percent
          correct scores.
Development of a Sampling Patch to Measure Dermal Exposures to Monomeric and Polymeric 1,6-Hexamethylene Diisocyanate: A Pilot Study
Jennifer M. Thomasen, Kenneth W. Fent and Leena A. Nylander-French

11. The primary species measured by the sampler appears
      to be:

a. unreacted monomer
b. isocyanurate
c. high MW polymers
d. co-polymers
12. Which of the following would be LEAST important in
      selecting a patch material?
a. adsorbency
b. absorbency
c. its vapor pressure
d. derivatization potential

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Deadline for answers is December 31, 2011.

Answers will be available online at
http://www.acgih.org/products/joeh/alanswers.htm
on January 9, 2012.

 
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