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Continuing Education — "The Action Level!®"

VOLUME 3(2), February 2006
Journal of Occupational and Environmental Hygiene

Answer the questions below and click "Submit".

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CASE STUDIES:

Maximum Sustainable Work Rate for Five Protective Clothing Ensembles with Respect to Moisture Vapor Transmission Rate and Air Permeability
Nancy W. Gonzalez, Thomas E. Bernard, Nora L. Carroll, Michael A. Bryner and James P. Ziegler

1. Which one of the following features of clothing most affects the
    ability to work in hot environments?

a. Air Permeability
b. Clothing Insulation
c. Moisture Vapor Transmission Rate
d. Work Demands
2. The evaporative cooling due to diffusion versus convection is related
    as:
a. Air Permeability versus Clothing Insulation
b. Air Permeability versus Moisture Vapor
         Transmission Rate
c. Moisture Vapor Transmission Rate versus Air
          Permeability
d. Moisture Vapor Transmission Rate versus Work
          Demands
An Application of Exposure Modeling in Exposure Assessments for a University Chemistry Teaching Laboratory
Chris Keil and Robert Murphy

3. Mathematical modeling is not mentioned in OSHA standards or
    preambles to standards as a method of exposure assessment.
    True or False?

True
False
4. Use the well-mixed room model presented in the text in the following
    problem. A small laboratory is approximately 32 feet by 16 feet
    with a 10-foot ceiling. There are two ceiling diffusers that supply
    fresh air. One supplies 310 ft3/min and the other 335 ft3/min. An
    extraction process results in the evaporation of 150 mL of methylene
    chloride (density: 1.33 g/mL) over the course of one hour. What is
    the average methylene chloride concentration in the room after
    5 minutes, 30 minutes and 60 minutes?
a. 2.4 mg/m3, 5.0 mg/m3, 5.1 mg/m3
b. 85 mg/m3, 178 mg/m3, 182 mg/m3
c. 139 mg/m3, 181 mg/m3, 182 mg/m3
d. 5,100 mg/m3, 10,700 mg/m3, 10,900 mg/m3
Blood Lead Levels in NASCAR Nextel Cup Teams
Joseph O'Neil, Gregory Steele, C. Scott McNair, Matthew M. Matusiak and Jyl Madlem

5. Lead toxicity has been associated with:

a. Difficulty concentrating
b. Weakness of fingers, wrists and ankles
c. Anemia
d. Elevated blood pressure
e. All of the above
6. If a worker has a blood lead level greater than 50 µg/dl, OSHA
    requires that the worker be removed from the work environment
    where the lead exposure is occurring. True or False?
True
False
Upper Limb Dynamic Responses to Impulsive Forces for Selected Assembly Workers
Mary E. Sesto, Robert G. Radwin, Walter F. Block and Thomas M. Best

7. Dynamic mechanical response parameters (e.g., stiffness, inertial
    mass and damping) were evaluated in several groups of assembly
    workers. Which group of workers had a significant reduction in
    mechanical response parameters?

a. Workers without symptoms and a negative
          physical examination
b. Workers with symptoms and a positive physical
          examination
c. Workers who operate torque producing power
          tools
d. Workers who operate non-torque producing power
          tools
8. Eccentric exertions (lengthening muscle contractions) often occur in
    the workplace and sometimes accompany the operation of:
a. Torque-producing power hand tools
b. Vibrating power hand tools
c. Manual hand tools
d. Non-ergonomic power hand tools
An Evaluation of Analytical Methods, Air Sampling Techniques and Airborne Occupational Exposure of Metalworking Fluids
Dave K. Verma, Don S. Shaw, M. Lorraine Shaw, Jim A. Julian, Shari-Ann McCollin and Karen des Tombe

9. Both NIOSH method 0500 and the ASTM method can be used to
    evaluate exposure to both oil and water-based MWFs, but the
    ASTM method should be the preferred method since it offers distinct
    advantages over the NIOSH 0500 method. True or False?

True
False
10. The ratio of thoracic aerosol and total aerosol ranged between 0.6
    and 0.7 and it is statistically significantly different from 0.8.
    True or False?
True
False


Deadline for answers is February 28, 2006.

Answers will be available online at
http://www.acgih.org/products/joeh/alanswers.htm
on March 13, 2006.

 
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