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Continuing Education — "The Action Level!®"

VOLUME 6(8), August 2009
Journal of Occupational and Environmental Hygiene


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CASE STUDIES:

Exposure to Wood Dust and its Particle Size Distribution in a Rubberwood Sawmill in Thailand
Nutjaree Saejiw, Naesinee Chaiear and Steven Sadhra

1. Which job produced the highest personal inhalable dust
    in a rubberwood sawmill?

a. Sawing of green lumber
b. Cutting of dry lumber
c. Boiler operation
d. One-sided planing
2. Which fraction of wood dust from a rubberwood sawmill
    may pose hazards to the respiratory tract?
a. Inhalable fraction
b. Respirable fraction
c. Thoracic fraction
d. Inhalable and respirable fractions
An Integrated Job Exposure Matrix for Electrical Exposures of Utility Workers
T. Dan Bracken, Robert Kavet, Robert M. Patterson and Tiffani A. Fordyce

3. What EMF factors are addressed in the Job Exposure
    Matrix described in this paper?

a. Electric and magnetic fields
b. Nuisance shocks and contact currents
c. Electrical injuries
d. All of the above
4. Which job category generally encounters the highest
    electric fields?
a. Cable splicers
b. Electricians
c. Line workers
d. Substation operators
e. None of the above
U.K. Linesmen's Experience of Microshocks on HV Overhead Lines
Y. Ahmed and S.M. Rowland

5. Sensitivity to microshocks varies between people. Of two
    individuals of the same height, the lighter is more likely to
    experience discomfort from microshocks. True or False?

True
False
6. A survey of linesmen in the U.S. by EPRI gave somewhat
    different conclusions than the recent survey reported in the UK
    by the University of Manchester. Which two of the following are
    the most likely reasons for this?
a. Different line voltages involved
b. Different weather patterns
c. The U.S. power frequency is 60 Hz, in the UK
          it is 50 Hz.
d. Different work practices
e. a and b
f. a and d
g. b and d
Perceptions of General Education on Occupational Health and Safety among College Students in Taiwan
Yu-Huei Tong, Yu-Wen Lin, Chin-Chieh Chen and Jia-Ming Lin

7. Which of the following factors is not a determinant that may
    significantly influence one's motivation to take an
    occupational health and safety (OHS) course?

a. experience in OHS coursework
b. academic background
c. learning interest on OHS topics
d. awareness on OHS topics
8. Which of the following items may not be considered important
    in devising a general OHS course for students in different
    disciplines?
a. Taking gender into account
b. Titling OHS topics properly
c. Satisfying students' expectations
d. Developing course module
Physiological and Comfort Effects of a Commercial "Cooling Cap" Worn Under Protective Helmets
P.J. Wickwire, P.A. Bishop, J.M. Green, M.T. Richardson, R.G. Lomax, C. Casaru and M. Curtner-Smith

9. A greater rate of increase in forehead temperature was
    experienced:

a. while wearing CP
b. while not wearing CP
c. forehead temperature did not rise
d. while wearing CP and while not wearing CP
10. What method of data analysis was used to determine if
      significant differences existed between CP and control
      for core temperature?
a. MANOVA
b. T-tests
c. Repeated measures ANOVA
d. ANCOVA
e. MANCOVA
Effect of Physical Exertion on the Biological Monitoring of Exposure to Various Solvents Following Exposure by Inhalation in Human Volunteers: III. Styrene
Ginette Truchon, Martin Brochu and Robert Tardif

11. Between the two biological indicators of exposure to
      styrene examined in this study, the sum of urinary mandelic
      and phenylglyoxylic acids is the only one that is sensitive
      to a moderate level of physical activity (50 watts) compared to
      exposure at rest. True or False?

True
False
12. Which of the following urinary concentrations of mandelic
      and phenylglyoxylic acids (sum) correspond to the values
      observed in the present study after exposure to 20 ppm
      of styrene under a moderate workload (50 watts) and the
      current BEI®, respectively?
a. 130 mg/g creatinine and 245 mg/g creatinine
b. 130 mg/g creatinine and 400 mg/g creatinine
c. 245 mg/g creatinine and 400 mg/g creatinine
d. 245 mg/g creatinine and 130 mg/g creatinine
Evaluation of an Innovative Use of Removable Thin Film Coating Technology for the Abatement of Hazardous Contaminants
Margaret E. Lumia, Charles Gentile, Michael Gochfeld, Philip Efthimion and Mark Robson

13. Workers chronically exposed to beryllium and beryllium
      compounds at the Permissible Exposure Limit can
      develop chronic beryllium disease. True or False?

True
False
14. After one application of the removable thin film coating
      technology, the percentage of metal surface dust contamination
      reduction was between:
a. 30–50%
b. 80–100%
c. 10–30%
d. 60–80%

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Deadline for answers is August 31, 2009.

Answers will be available online at
http://www.acgih.org/products/joeh/alanswers.htm
on September 11, 2009.

 
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