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Continuing Education — "The Action Level!®"

VOLUME 7(9), September 2010
Journal of Occupational and Environmental Hygiene


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CASE STUDIES:

Effects of Air Velocity and Clothing Combination on Heating Efficiency of an Electrically Heated Vest (EHV): A Pilot Study
Faming Wang, Chuansi Gao and Ingvar Holmér

1. The heating efficiency of electrically heated clothing
    could be affected by which of the following?

a. air temperature
b. air velocity
c. clothing combination
d. all of the above
2. Study results show that the EHV might be worn for occupational
    groups whose metabolic rate is above 1.9 MET at an ambient
    temperature below 0 °C. True or False?
True
False
Airborne Diazinon Concentrations During and After Outdoor Spray Application
Peter C. Raynor, Andrea Barteková, J. Girard Griggs, Matt F. Simcik and John L. Adgate

3. The current restricted-entry interval (REI) for workers entering
    a bed of ornamental plants that has been sprayed with
    diazinon is:

a. 8 hours
b. 25 hours
c. 2 days
d. 18 days
4. Analyses of personal air samples taken on a pesticide
    applicator spraying diazinon onto azalea bushes yielded
    concentrations that were approximately ___% of the
    ACGIH® TLV® for diazinon.
a. 0–10
b. 10–50
c. 50–100
d. 100–200
Workers' Experience of Slipping in U.S. Limited Service Restaurants
Santosh K. Verma, Wen-Ruey Chang, Theodore K. Courtney, David A. Lombardi, Yueng-Hsiang Huang, Melanye J. Brennan, Murray A. Mittleman and Melissa J. Perry

5. What two areas were perceived most slippery by limited
    service restaurant workers?

a. sink and fryer
b. grill/broiler and assembly
c. front counter and ice machine
d. freezer/cooler and drive through
6. Which age group had the lowest prevalence of slip resistant
    shoe use?
a. 20 to 29 years
b. 30 to 39 years
c. 40 to 49 years
d. 15 to 19 years
Quantitative Crystalline Silica Exposure Assessment for a Historical Cohort Epidemiologic Study in the German Porcelain Industry
Thomas Birk, Karlheinz Guldner, Kenneth A. Mundt, Dirk Dahmann, Robert C. Adams and William Parsons

7. After 1960, no measurable cristobalite exposures were
    found in porcelain firing. Which technological improvement
    was mostly likely responsible for reducing potential
    exposures to cristobalite?

a. Replacement of wooden floors with concrete
          or asphalt
b. Adoption of respiratory protection during
          loading of kilns
c. Replacement of intermittent kilns with
          continuous gas-fired tunnel kilns
d. Use of central vacuum systems to remove
          settled dusts from floors and other surfaces
8. For most of the work areas, which of the following represents
    a practical equivalence for concentrations in particles per cubic
    centimeter (Konimetry data) that were later converted to
    mg/m3?
a. 1 ppcc ≈ 1 mg/m3
b. 1 ppcc ≈ 0.6 mg/m3
c. 1 ppcc ≈ 0.03 mg/m3
d. 1 ppcc ≈ 0.009 mg/m3
Use of a Condensation Particle Counter and an Optical Particle Counter to Assess the Number Concentration of Engineered Nanoparticles
Linda H. Schmoll, Thomas M. Peters and Patrick T. O'Shaughnessy

9. The "count-difference" method refers to establishing a baseline
    level of counts in a workplace by subtracting counts made with
    an optical particle counter from those made with a condensation
    particle counter. True or False?

True
False
10. The ability of an optical particle counter to accurately size
      particle diameters and therefore place their corresponding
      counts in the correct size bins is most dependent on the
      ______ of the particle.
a. density
b. refractive index
c. moisture content
d. agglomeration state
Inactivation of Methicillin-resistant Staphylococcus aureus (MRSA) and Vancomycin-resistant Enterococcus faecium (VRE) on Various Environmental Surfaces by Mist Application of a Stabilized Chlorine Dioxide and Quaternary Ammonium Compound-based Disinfectant
K.L. Callahan, N.K. Beck, E.A. Duffield, G. Sin and J.S. Meschke

11. Acidification of chlorite may result in generation of chlorine
      dioxide. True or False?

True
False
12. Important factors considered in the selection of a surface
      disinfectant should include which of the following?
a. amount of organic soil load on the surface
b. necessary contact time
c. compatibility with the surface
d. all of the above

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Deadline for answers is September 30, 2010.

Answers will be available online at
http://www.acgih.org/products/joeh/alanswers.htm
on October 11, 2010.

 
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