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Continuing Education — "The Action Level!®"

VOLUME 2(7), July 2005
Journal of Occupational and Environmental Hygiene

Answer the questions below and click "Submit".

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CASE STUDIES:

Exercise Performance While Wearing a Tight-Fitting Powered Air Purifying Respirator with Limited Flow
Arthur T. Johnson, Kathryn R. Mackey, William H. Scott, Frank C. Koh, Ken Y.H. Chiou and Stephanie J. Phelps

1. As long as pressure inside the facepiece remains positive,
   protection provided by a powered air purifying respirator should
   be _________ that of a non-powered air purifying respirator.

a. equal to
b. more than
c. less than
2. A study employing human subjects should be approved by which
   of the following:
a. institutional review board
b. joint safety management committee
c. safety manager
d. corporate medical director
The Effect of Pressure Drop on Respirator Faceseal Leakage
Larry Janssen and Robert Weber

3. The authors have determined that faceseal leakage:

a. increases with pressure drop regardless of how
          well a respirator fits.
b. increases in direct proportion to leak size when
          fit is poor.
c. Does not increase with pressure drop when
          respirators fit well enough to be assigned to
          a worker.
4. The authors suggest that small changes in respirator fit affect
    faceseal leakage to a greater extent than increasing pressure drop.
    True or False?
True
False
Pesticide Contamination Inside Farm and Nonfarm Homes
Brian D. Curwin, Misty J. Hein, Wayne T. Sanderson, Marcia G. Nishioka, Stephen J. Reynolds, Elizabeth M. Ward and Michael C. Alavanja

5. Seven target pesticides were selected for evaluation in this study.
    Why?

a. Toxicity
b. Extensive use
c. Restricted use
d. All of the above
6. Which sample media used in this study was the best for evaluating
    pesticides and why?
a. Dust; ease and convenience of sampling
b. Air; better limits of detection
c. Dust; better limits of detection
d. Wipe; ease and convenience of sampling
On the Use of Different Measures of Exposure — Experiences from a Case-Control Study on Testicular Cancer and PVC Exposure
Håkan B.T. Westberg, Lennart O. Hardell, Nils Malmqvist, Carl-Göran Ohlson and Olav Axelson

7. Five different exposure measures were used for exposure
    response-analyses. Ever/never exposed, duration of exposure,
    median and maximum intensity were included. What was the
    fifth exposure measure?

a. Average individual PVC air concentrations
b. Peak individual PVC air concentrations
c. Cumulative median intensity
d. Maximum intensity years
8. The odds ratios for "ever exposed" as reported in the questionnaires
    was 1.1 and, as determined by expert assessment, 1.3. These
    figures strongly supported a statistically significant relation between
    testicular cancer and PVC exposure. True or False?
True
False
Characterizing Historical Industrial Hygiene Data: A Case Study Involving Benzene Exposures at a Chemical Manufacturing Facility (1976-1987)
Pamela R.D. Williams and Dennis J. Paustenbach

9. The collection of industrial hygiene air sampling data have
    historically served two primary purposes: 1) to identify sources
    of emissions, and 2) to assess worker exposure levels.
    True or False?

True
False
10. Which types of sampling data are generally NOT representative of
      actual worker exposure levels over an 8 hour day?
a. Area samples collected to identify an
          emission source
b. Peak samples collected during an episodic
          or unusual event
c. 8 hr TWA lapel samples collected while worker
          is wearing a respirator
d. All of the above


Deadline for answers is July 31, 2005.

Answers will be available online at
http://www.acgih.org/products/joeh/alanswers.htm
on August 8, 2005.

 
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