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Continuing Education — "The Action Level!®"

VOLUME 8(5), May 2011
Journal of Occupational and Environmental Hygiene


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CASE STUDIES:

Evaluation and Comparison of Three Exposure Assessment Techniques
R.L. Neitzel, W.E. Daniel, L. Sheppard, H.W. Davies and N.S. Seixas

1. When considering the following approaches to assess
    exposures to noise in the construction industry, which
    approach is most likely to produce accurate exposure
    estimates?

a. Task-based
b. Subjective ratings approach
c. Use trade mean exposures
d. Expert ratings
2. Use of trade as a predictor of potential noise exposure levels
    was found to produce highly accurate exposure estimates
    among construction workers. True or False?
True
False
Health Care Workers and Respiratory Protection: Is the User Seal Check a Surrogate for Respirator Fit-Testing?
Quinn Danyluk, Chun-Yip Hon, Mike Neudorf, Annalee Yassi, Elizabeth Bryce, Bob Janssen and George Astrakianakis

3. In terms of the article (not necessarily regulatory issues) a user
    seal check can be considered a reproducible substitute for an
    actual fit test (N95 respirators). True or False?

True
False
4. Of naïve users who felt they had an adequate face seal following
    the user seal check, what percentage failed the subsequent
    quantitative fit-test?
a. 5%
b. 15%
c. 25%
d. 30%
Estimating Airborne Benzene Exposures from Air Monitoring Data for Mineral Spirits
Melvyn Kopstein

5. According to the peer-reviewed literature, the weight %
    benzene in regular mineral spirits is:

a. 5–10% (50,000–100,000 ppm)
b. 0.001–0.01% (10–100 ppm)
c. .0001–.002% (1–20 ppm)
d. .1–1.0% (1,000–10,000 ppm)
6. According to thermodynamics theory and published vapor
    liquid equilibrium (VLE) experimental studies, benzene is
    present in petrochemical mixtures that have boiling point
    ranges higher than benzene's boiling point. True or False?
True
False
Potential Artifacts Associated with Historical Preparation of Joint Compound Samples and Reported Airborne Asbestos Concentrations
G.P. Brorby, P.J. Sheehan, D.W. Berman, K.T. Bogen and S.E. Holm

7. Which chemical(s) was (were) used to clear and mount filters
    for PCM analysis according to NIOSH Method P&CAM
    Method 239?

a. Dimethyl phthalate
b. Diethyl oxalate
c. Dimethyl phthalate and diethyl oxalate
d. Acetone and triacetin
8. According to NIOSH Method 7402, filters can be prepared for
    TEM analysis using acetic acid and dimethylformamide instead
    of acetone. True or False?
True
False
Integrity of Disposable Nitrile Exam Gloves Exposed to Simulated Movement
Robert N. Phalen and Weng Kee Wong

9. A major drawback of the traditional one-liter water-leak test
    method with disposable nitrile rubber exam gloves was that small
    holes were _________________________.

a. irregularly shaped
b. not reliably detected
c. capable of passing a virus
d. not significant
10. In general, significant variability in glove integrity was observed
      between different glove types or formulations. On average,
      the ______________ glove type(s) had the lowest proportions
      of leaks, whereas the ______________ glove type(s) had the
      highest proportions of leaks.
a. cleanroom and medical-grade; low-modulus
b. cleanroom; low-modulus and medical-grade
c. low-modulus and medical-grade; general-duty
d. low-modulus and medical-grade; cleanroom
Factors Influencing Dust Exposure: Finishing Activities in Drywall Construction
Catherine Simmons, Rachel M. Jones and Fred Boelter

11. Respirable dust concentrations in the area surrounding
      sanding are correlated with air change rate. True or False?

True
False
12. During sanding with which of the following tools was the
      respirable dust concentration in the personal breathing zone
      of the sander highest?
a. Hand sanding block with 80-grit sandpaper
b. Pole sander with 80-grit sandpaper
c. Hand sander with 220-grit sandpaper
d. Pole sander with 220-grit sandpaper
A Comparison of the Wheeler-Jonas Model and the Linear Driving Force at Constant-Pattern Model for the Prediction of the Service Time of Activated Carbon Cartridges
Georges Grévillot, Stéphanie Marsteau and Cécile Vallières

13. The LDF model is based on a mass transfer model of
      adsorbate into the particle. Which of the following choices
      best describes the basis for the linear driving force model?

a. mass transfer
b. desorption
c. absorption
d. sublimation
e. conjugate transfer
14. Under which of the following circumstances would both models
      discussed herein likely fail?
a. very low concentrations
b. concentrations measurable using GC/MS
c. intermediate concentrations
d. high concentrations
e. models never fail regardless of concentrations

Be sure FULL NAME and EMAIL information is provided at the top of this page before submitting your answers.


Deadline for answers is May 31, 2011.

Answers will be available online at
http://www.acgih.org/products/joeh/alanswers.htm
on June 8, 2011.

 
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