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Continuing Education — "The Action Level!®"

VOLUME 7(6), June 2010
Journal of Occupational and Environmental Hygiene


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

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CASE STUDIES:

Factors Affecting the Location and Shape of Face Seal Leak Sites on Half Mask Respirators
Reidar Kent Oestenstad and Alfred A. Bartolucci

1. Which of the following study factors was found to have a
    significant effect on respirator leak site location and shape?

a. Respirator brand
b. Gender
c. Test repetition
d. None of the above
2. Study results suggest that facial shape and dimensions
    may be important determinants for the location and shape of
    leak sites among half-mask respirators. True or False?
True
False
Personal Exposure of Traffic Police Officers to Particulate Matter, Carbon Monoxide and Benzene in the City of Milan, Italy
Andrea Cattaneo, Matteo Taronna, Dario Consonni, Silvana Angius, Paolo Costamagna and Dominico Maria Cavallo

3. Did ambient levels measured at fixed positions underestimate
    personal exposures of traffic policemen to benzene?

a. No, they overestimated personal exposures
          by an average of about 7 micrograms per cubic
          meter.
b. No, they overestimated personal exposures
          by an average of about 15 micrograms per cubic
          meter.
c. Yes, they underestimated personal exposures
          by an average of about 7 micrograms per cubic
          meter.
4. What were the most important factors affecting personal
    exposures of traffic policemen to CO in the city of Milan?
a. Active tobacco smoke
b. Traffic guarding and other activities performed
          near motorized traffic
c. The season
d. a, b, and c
e. b and c only
Flow Cytometric Analysis of the Oxidative Status in Human Peripheral Blood Mononuclear Cells of Workers Exposed to Welding Fumes
Lissinda du Plessis, Petrus Laubscher, Jacques Jooste, Johan du Plessis, Anja Franken, Nico van Aarde and Fritz Eloff

5. The oxidative stress ratio can be calculated by dividing the
    oxidative stress index by the i)____________. The oxidative
    stress index is generally represented by ii)___________ and
    the iii)_______________ by iv)_____________.

a. i) antioxidant index; ii) oxidative damage;
          iii) antioxidant index; iv) antioxidant capacity
b. i) antioxidant capacity; ii) antioxidant index;
          iii) antioxidant index; iv) oxidative damage
c. i) antioxidant index; ii) antioxidant capacity;
          iii) oxidative damage; iv) antioxidant index
6. Intracellular GSH levels are a measure of cellular oxidation-
    reduction status and may constitute a useful toxicologic endpoint.
    In this study workers exposed to welding fumes exhibited:
a. increased levels of intracellular GHS and
          increased lipid peroxidation
b. decreased levels of intracellular GSH and
          increased lipid peroxidation
c. decreased levels of plasma GSH and increased
          lipid peroxidation
d. decreased levels of intracellular GSH and
          increased lipid peroxidation, which lead to an
          increased oxidative stress ratio.
Personal Exposure of Aerosolized Red Tide Toxins (Brevetoxins)
Yung Sung Cheng, Yue Zhou, Jerome Naar, C. Mitch Irvin, Wei-Chung Su, Lora E. Fleming, Barbara Kirkpatrick, Richard H. Pierce, Lorraine C. Backer and Daniel G. Baden

7. The efficiency brevetoxin nasal swab sampling could be
    affected by which of the following?

a. nostril sampled
b. breathing cycle
c. absorption of brevetoxin residue
d. breathing cycle
e. all of the above
8. Which of the following modalities was not employed in the
    present study?
a. high-volume sampler
b. nasal swabs
c. personal air sampler
d. pulmonary function testing
On the Inconsistencies Related to Prediction of Flow into an Enclosing Hood Obstructed by a Worker
Ertan Karaismail and Ismail Celik

9. Which of the following turbulence models was not tested
    in the present study?

a. Renormalization Group (RNG) k-ε model
b. Standard k-ε model
c. Reynolds Stress Model
d. Shear Stress Transport (SST) k-ω model
10. Based on the calculations performed, at high Reynolds
      number (Re=105) an unsteady recirculation zone forms
      in the near-wake of the worker. True or False?
True
False
Evaluation of Bacterial Contamination and Control Methods in Soluble Metal Working Fluids
Geneviève Marchand, Jacques Lavoie, Louise Racine, Nancy Lacombe, Yves Cloutier, Éric Bélanger, Christian Lemelin and Jean Desroches

11. The concentration of bacteria in the cutting fluid is not
      influenced by the addition of biocide. True or False?

True
False
12. MacConkey culture media is use for the recovery of Gram-
      negative bacteria. True or False?
True
False
Identification of Compounds Formed During Low Temperature Thermal Dispersion of Encapsulated o-Chlorobenzylidene Malononitrile (CS Riot Control Agent)
Joseph J. Hout, Gary L. Hook, Peter T. LaPuma and Duvel W. White

13. The identification of 3-(2-chlorophenyl) propynenitrile in the
      mask confidence chamber suggests the presence of what
      acutely toxic compound?

a. Hydrogen sulfide
b. Hydrogen cyanide
c. Ammonia
d. Chlorine
14. What temperature of dispersal is recommended to reduce
      the number of thermal degradation products while still
      dispersing CS?
a. 50 C
b. 150 C
c. 450 C
d. 900 C

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Deadline for answers is June 30, 2010.

Answers will be available online at
http://www.acgih.org/products/joeh/alanswers.htm
on July 9, 2010.

 
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