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Continuing Education — "The Action Level!®"

VOLUME 7(4), April 2010
Journal of Occupational and Environmental Hygiene


Provide FULL NAME and EMAIL information below, then answer the questions and click "Submit".

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CASE STUDIES:

An Accurate Substitution Method for Analyzing Censored Data
Gary H. Ganser and Paul Hewett

1. Where one or more measurements are below the limit of
    detection (LOD), which of the following has been considered
    the gold standard for estimating the GM and GSD of the
    underlying exposure profile?

a. maximum likelihood estimation (MLE) method
b. regression coefficient approximation
c. 24-hour maxima
d. 8-hour maxima
2. Which of the following was not noted as a parameter
    of the lognormal distribution?
a. sample geometric mean (GM)
b. geometric standard deviation (GSD)
c. 95th percentile
d. mean
e. arithmetic standard deviation (ASD)
Field Evaluation of a Modified Intervention for Overhead Drilling
David Rempel, Demetra Star, Alan Barr, Marco Mendoza Blanco and Ira Janowitz

3. Based on population modeling, the force required to perform
    overhead drilling into a concrete ceiling for the 50th percentile
    male is what percent of shoulder muscle strength:

a. 50%
b. 60%
c. 70%
d. 80%
e. 90%
4. The risks associated with overhead drilling into concrete
    include:
a. shoulder disorders
b. falling
c. silica dust exposure
d. hand vibration exposure
e. all of the above
Diacetyl Exposures at Four Microwave Popcorn Plants
Kenneth L. White, Kurt Heikkila, Rod Williams, Linda Levin, James E. Lockey and Carol Rice

5. The chemical diacetyl is:

a. a diketone
b. used in various foods to impart a butter-like flavor
c. a potential cause of bronchiolitis obliterans
d. all of the above
6. In microwavable popcorn production plants, the highest
    exposures typically occur to:
a. packaging line workers
b. maintenance workers
c. mixers
d. quality assurance workers
Stoffenmanager Exposure Model: Company-Specific Exposure Assessments Using a Bayesian Methodology
Peter van de Ven, Wouter Fransman, Jody Schinkel, Carina Rubingh, Nicholas Warren and Erik Tielemans

7. The update of an exposure assessment using a Bayesian
    approach requires a large exposure database. True or False?

True
False
8. A prior in a Bayesian exposure assessment should always
    be based on a model. True or False?
True
False
Nanoparticle Usage and Protection Measures in the Manufacturing Industry – A Representative Survey
Kaspar Schmid, Brigitta Danuser and Michael Riediker

9. According to this study, the percentage of companies that
    use engineered nanoparticles is:

a. ca. 1%
b. ca. 4%
c. ca. 9%
d. ca. 17%
10. A majority of companies have already adopted technical
     protection strategies against nanoparticle exposure for their
     workers and the environment. True or False?
True
False
Laboratory Evaluation to Reduce Respirable Crystalline Silica Dust When Cutting Concrete Roofing Tiles Using a Masonry Saw
Rebecca V. Carlo, John Sheehy, H. Amy Feng and William K. Sieber

11. In this study, a reduction in the manufacturer's recommended
     water flow rate by half during tile cutting resulted in much higher
     geometric mean respirable dust concentrations. True or False?

True
False
12. Local Exhaust Ventilation (LEV) controls should be field
     tested during actual residential roofing construction to
     ascertain their effectiveness. Concerns with implementing
     an LEV system to control silica dust exposures include:
a. sufficient capture velocity
b. additional weight of the saw with the LEV system
c. cost of air handling unit
d. all of the above
Experimental Evaluation of Oil Mists Using a Semivolatile Aerosol Dichotomous Sampler
Seung Won Kim and Peter C. Raynor

13. For metalworking fluid (MWF) droplets, compounds having
     low molecular weight were less prevalent in the vapor phase
     than those compounds with high molecular weight. True
     or False?

True
False
14. According to this article, the most non-susceptible method
     to evaporative loss and subsequent underestimation of airborne
     particle concentrations in semivolatile aerosol sampling was:
a. filtration method
b. electrostatic precipitator method
c. virtual impactor (SADS) method
d. sorbent tube method

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


Deadline for answers is April 30, 2010.

Answers will be available online at
http://www.acgih.org/products/joeh/alanswers.htm
on May 10, 2010.

 
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