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Continuing Education — "The Action Level!®"

VOLUME 4(5), May 2007
Journal of Occupational and Environmental Hygiene

Answer the questions below and click "Submit".

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CASE STUDIES:

Estimating Service Lives of Organic Vapor Cartridges III: Multiple Vapors at All Humidities
Gerry O. Wood and Jay L. Snyder

1. The presence of a second or third organic vapor in workplace
    air usually has no effect on the service life of an air-purifying
    respirator cartridge for a vapor of interest. True or False?

True
False
2. A phenomenon due to displacement of one adsorbing organic
    vapor by another as air is breathed through a respirator cartridge
    is called:
a. Mixing
b. Absorption
c. Rollup
d. Digression
The Characterization and Mapping of Very Fine Particles in an Engine Machining and Assembly Facility
William A. Heitbrink, Douglas E. Evans, Thomas M. Peters and Thomas J. Slavin

3. Ultrafine particles refer to particles:

a. smaller than 2.5 micrometers
b. smaller than 1.0 micrometer
c. smaller than 0.3 micrometers
d. smaller than 0.1 micrometers
4. The major source of ultrafine or very fine particles in the Block
    Head Rod Area of the plant during winter was apparently:
a. the gas heaters
b. the heat treating operation
c. incomplete machining enclosures
d. the outside air
Fundamental Factors Affecting Upper-Room Ultraviolet Germicidal Irradiation - Part I. Experimental
Melvin First, Stephen N. Rudnick, Kevin F. Banahan, Richard L. Vincent and Phillip W. Brickner

5. What is the criterion limit recommended by ACGIH® for skin and
    eye exposure to UV-c, 254 nm radiation during an 8-hr period?

a. Greater than 6 mJ/cm2
b. No more than 6 mJ/cm2
c. No more than 0.2 mJ/cm2
d. None of the above
6. Air-mixing fan operation has no bearing on UVGI effectiveness in
    inactivating airborne microorganisms. True or False?
True
False
Fundamental Factors Affecting Upper-Room Ultraviolet Germicidal Irradiation – Part II. Predicting Effectiveness
Stephen N. Rudnick and Melvin First

7. The low-pressure UV lamps used in this study convert what fraction
    of the lamp's electrical energy input to UV radiation?

a. <2%
b. about 10%
c. about 30%
d. about 50%
e. about 70%
f. about 80%
8. Which of the following parameters does not have a significant effect
    on the effectiveness of an upper-room UVGI system?
a. mean UV ray length
b. UV power output of the fixture
c. room volume
d. microorganism concentration
e. vertical airspeed
f. outdoor air exchange rate
Use of and Exposure to Trichloroethylene in the US Industry: A Systematic Literature Review
Berit Bakke, Patricia A. Stewart and Martha A. Waters

9. What industry is the primary user of degreasing operations?

a. Petroleum refining industry
b. Service industry
c. Metal industry
d. Leather industry
10. Vapor degreasing requires chlorinated solvents due to their unique
      physical properties of possessing nonflammable vapors that are
      heavier than air. True or False?
True
False
Glutaraldehyde Exposures Among Workers Making Bioprosthetic Heart Valves
Patrice M. Sutton, Julia Quint, Janice Prudhomme, Jennifer Flattery, Barbara Materna and Robert Harrison

11. The current TLV-C for glutaraldehyde, equal to the newly approved
      Cal/OSHA PEL ceiling limit of 0.05 ppm, is based on protecting
      workers against asthma. True or False?

True
False
12. A glutaraldehyde-exposed worker who has developed sensitizer-
      induced asthma can have symptoms when exposed to even very
      small amounts of glutaraldehyde or other irritant chemicals,
      making it difficult or impossible to continue working where
      glutaraldehyde exposure continues to occur. True or False?
True
False
Hand-Handle Interface Force and Torque Measurement System for Pneumatic Assembly Tool Operations: Suggested Enhancement to ISO 6544
Jia-Hua Lin, Raymond W. McGorry and Chien-Chi Chang

13. What are the methods available to assess operator response and
      effort during assembly power tool use?

a. Surface EMG
b. Subjective ratings of perceived exertion
c. Direct force measurement
d. Ground reaction force
e. All of the above
14. Considering the tool geometry (specifically, its torque direction
      relative to the hand-arm), and torque buildup rate (time for the tool
      to reach peak torque) of the three power nutrunners tested in this
      study, which one resulted in the most lag between tool torque and
      hand moment?
a. Pistol grip tool (P)
b. Right angle tool (R)
c. In-line tool (I)


Deadline for answers is May 31, 2007.

Answers will be available online at
http://www.acgih.org/products/joeh/alanswers.htm
on June 11, 2007.

 
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