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Continuing Education — "The Action Level!®"

VOLUME 10(3), March 2013
Journal of Occupational and Environmental Hygiene


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CASE STUDIES:

Assessment of the Contribution of Electron Microscopy to Nanoparticle Characterization Sampled with Two Cascade Impactors
Alexandra Noël, Gilles L'espérance, Yves Cloutier, Philippe Plamondon, Julie Boucher, Suzanne Philippe, Chantal Dion, Ginette Truchon and Joseph Zayed

1. When determining nanoparticle concentrations, results from
    which device are less likely to be confounded by resuspension?

a. Electrical Low Pressure Impactor (ELPI)
b. Micro-Orifice Uniform Deposit Impactor (MOUDI)
c. Andersen Impactor
2. Why is electron microscopy well suited for the characterization
    of nanoparticles?
a. It provides good quality images.
b. It allows adequate counting of particles.
c. It is an essential instrument for distinguishing
          single nanoparticle from agglomerates
          in an aerosol.
d. All of the above
Penetration of Fiber Versus Spherical Particles Through Filter Media and Faceseal Leakage of N95 Filtering Facepiece Respirators with Cyclic Flow
Kyungmin Jacob Cho, Leonid Turkevich, Matthew Miller, Roy McKay, Sergey A. Grinshpun, KwonChul Ha and Tiina Reponen

3. The conventional fit testing (Portacount Plus with N95
    companion) measures the following types of particles:

a. Particles at the size of 0.3 µm
b. Charged particles at the nominal size of 50 nm
c. Particles in the size range of 0.7–10 µm
4. NIOSH certified N95 respirators have:
a. > 95% efficiency under all types of conditions.
b. > 95% efficiency for particles with diameter
          of 0.3 µm.
c. > 95% efficiency for charge neutralized sodium
          chloride particles with mass median diameter
          of 0.3 µm at a constant airflow of 85 L/min.
Firefighter Noise Exposure During Training Activities and General Equipment Use
Kyle S. Root, Catherine Schwenker, Daniel Autenrieth, Delvin R. Sandfort, Tiffany Lipsey and William J. Brazile

5. What was the average level of noise (dBA) during firefighter
    training activities?

a. 98 dBA
b. 65 dBA
c. 78 dBA
d. Undetermined
6. What was the highest measured noise level outside of
    the fire engine and where was this located in reference
    to the vehicle?
a. 79 dBA, Front
b. 68 dBA, Rear
c. 79 dBA, Rear
d. 68 dBA, Front
Anthropometry-Corrected Exposure Modeling as a Method to Improve Trunk Posture Assessment with a Single Inclinometer
Robin Van Driel, Catherine Trask, Peter W. Johnson, Jack P. Callaghan, Mieke Koehoorn and Kay Teschke

7. What anthropometric measurement was found to increase
    the predictive ability of the VC inclinometer?

a. Lower arm length
b. Upper arm length
c. Foot length
8. Which types of tasks were assessed during the study?
a. manual assembly tasks
b. lifting tasks
c. simulated construction tasks
d. walking and running gait
Simulated Restaurant Cook Exposure to Emissions of PAHs, Mutagenic Aldehydes and Particles from Frying Bacon
Rikke Bramming Jørgensen, Bo Strandberg, Ann Kristin Sjaastad, Arve Johansen and Kristin Svendsen

9. The excess level of ultrafine particles generated during frying
    on a gas stove compared with an electric stove is mainly
    because of particles from the burning gas. True or False?

True
False
10. Retene is the particle bound PAH that is found in elevated
      levels after frying of smoked bacon. True or False?
True
False
A New Approach for Diffusive Sampling Based on SPME for Occupational Exposure Assessment
P. Marin, J.F. Periago and C. Prado

11. Which of the following analytes was not considered in
      this work?

a. toluene
b. chlorobenzene
c. methyl benzene
d. benzene
12. Which of the following choices most accurately matches
      the meaning of U?
a. concentration
b. exposure time
c. pump sampling rate
d. diffusive uptake rate

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Deadline for answers is March 31, 2013.

Answers will be available online at
http://www.acgih.org/products/joeh/alanswers.htm
on April 15, 2013.

 
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