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Continuing Education — "The Action Level!®"

VOLUME 6(10), October 2009
Journal of Occupational and Environmental Hygiene


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

Full Name:
E-Mail:

CASE STUDIES:

Man-Made Vitreous Fibers in Office Buildings in the Helsinki Area
Heidi J. Salonen, Sanna K. Lappalainen, Henri M. Riuttala, Antti P. Tossavainen, Pertti O. Pasanen and Kari E. Reijula

1. The recommended limit value for the deposition rate of MMVF
    longer than 20 micrometers during two weeks collected by
    special tape is 0.2 MMVF/cm2. True or False?

True
False
2. Skin irritation results from fibers generally with a diameter
    greater than 5 um. True or False?
True
False
Short-Term Heat Stress Exposure Limits Based on Wet Bulb Globe Temperature Adjusted for Clothing and Metabolic Rate
Thomas E. Bernard and Candi D. Ashley

3. Job risk factors for heat stress include:

a. Environment, metabolic rate, and clothing
b. Environment, metabolic rate, clothing,
          and aerobic capacity
c. Environment, metabolic rate, clothing, and CAF
d. Environment, metabolic rate, clothing, and
          exposure time
4. As designed, the Safe Exposure Time is likely to be
    protective of more than 95% of the person-exposures when:
a. The protective clothing is a vapor-barrier
          (CAF of 11 °C-WBGT)
b. The metabolic rate is less than 200 W
c. The environment is near the TLV®
d. The workforce is predominately male
Etiology of Work-Related Electrical Injuries: A Narrative Analysis of Workers Compensation Claims
David Lombardi, Simon Matz, Melanye Brennan, Gordon Smith and Theodore Courtney

5. According to the article, the most frequent sources for
    work-related electrical injury were:

a. Wires, cables, and cords
b. Fixtures, bulbs, and switches
c. Appliances and office equipment
d. Lightning
e. None of the above
6. Electrocutions are disproportionately fatal in comparison to
    other work related injuries. For the current study, what percent
    of all cases resulted in fatalities?
a. 1.2%
b. 2.1%
c. 4.5%
d. 7.3%
Performance of an N95 Filtering Facepiece Particulate Respirator and a Surgical Mask during Human Breathing: Two Pathways for Particle Penetration
Sergey A. Grinshpun, Hiroki Haruta, Robert M. Eninger, Tiina Reponen, Roy T. McKay and Shu-An Lee

7. Protection offered by an N95 facepiece filtering respirator
    or a surgical mask depends primarily on the penetration of
    aerosol particles through the filter medium; penetration through
    faceseal leakage constituted a very small contribution to the
    total inward leakage. True or False?

True
False
8. Facial or body movement affects the relative contribution of
    particles penetrating through the respirator/mask filter and
    faceseal leakage. True or False?
True
False
Changes in Collection Efficiency in Nylon Net Filter Media through Magnetic Alignment of Elongated Aerosol Particles
Christopher O. Lam and W.H. Finlay

9. When high aspect ratio aerosol particles are forced to align
    with an external magnetic field while flowing through a filter,
    an increase in the filtration of high aspect ratio particles occurs
    mainly due to enhanced:

a. interception
b. diffusion
c. impaction
d. sedimentation
10. Alignment of aerosol fibers with an external magnetic field
     (aligned perpendicular to the flow direction) while the fibers
     are flowing through a filter does not always increase filtration
     efficiency. This is because:
a. particle density is reduced in nonhomogenous
          media in the presence of a magnetic field
b. filter pore sizes are increased due to magnetic
          anisotropy effects
c. reductions in interception are countered by
          increases in other deposition mechanisms
d. enhanced electrostatic deposition counters
          magnetic field effects
Objective Color Scale for the SWYPE Surface Sampling Technique Using Computerized Image Analysis Tools
Diana M. Ceballos, Michael G. Yost, Stephen G. Whittaker, Janice Camp and Russell Dills

11. What variables affect the perception of color for the
      SWYPE colorimetric pads?

a. the viewer
b. lighting conditions
c. time elapsed after sampling
d. lack of color uniformity
e. all of the above
12. Potential diisocyanate dermal exposure in autobody shops
     may be caused by:
a. spills of the hardener or mixed paint
b. over spray
c. handling recently painted parts
d. all of the above
Indicators of Hearing Protection Use: Self-Report and Researcher Observation
Stephen C. Griffin, Richard Neitzel, William E. Daniell and Noah S. Seixas

13. Workers' ability to accurately self report hearing protection
     device use is likely influenced by ____ and ____:

a. social desirability bias, supervisor expectation.
b. noise exposure variability, recall time.
c. researcher observation, workplace safety climate.
d. hearing loss, tinnitus.
14. Never/always reporting is a strong predictor of accurate survey
     self-reporting of hearing protection device use. True or False?
True
False

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


Deadline for answers is October 31, 2009.

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

 
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