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Continuing Education — "The Action Level!®"

VOLUME 10(7), July 2013
Journal of Occupational and Environmental Hygiene


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CASE STUDIES:

Occupational Exposures to Respirable Crystalline Silica During Hydraulic Fracturing
Eric J. Esswein, Michael Breitenstein, John Snawder, Max Kiefer and Karl Sieber

1. At the hydraulic fracturing sites evaluated in the NIOSH study,
    workers with the highest risks for exposure to respirable
    crystalline silica included:

a. Blender and Hydration Unit Operators
b. Wire Line and Water Truck Operators
c. Scarfers and Roustabouts
d. Sand Coordinators and Water Tank Operators
e. T-belt and Sand Mover Operators
2. Exposures to Respirable Crystalline Silica can cause which
    of the following diseases?
a. Lung Cancer
b. COPD
c. Kidney disease
d. Scleroderma
e. Silicosis
f. All of the above
Determinants of Respirable Silica Exposure in Stone Countertop Fabrication: A Preliminary Study
Margaret L. Phillips, David L. Johnson and Andrew C. Johnson

3. Controlling for the relative amount of dry methods used,
    exposure to respirable silica during countertop fabrication with
    the engineered stone product known as "quartz" was:

a. Consistently higher than exposure to respirable
          silica during countertop fabrication with granite.
b. Not generally higher than exposure to respirable
          silica during countertop fabrication with granite.
c. Consistently lower than exposure to respirable
          silica during countertop fabrication with granite.
d. Consistently below the threshold limit value.
4. Full-shift time-weighted average exposures were calculated
    to be below the TLV® for fabricators performing which activities?
a. Operation of bridge saw or automated edge
          shaping machine
b. Operation of CNC machine and handheld
          dry saw
c. Operation of stone router and handheld wet saw
d. All of the above
Antineoplastic Drug Contamination of Surfaces Throughout the Hospital Medication System in Canadian Hospitals
Chun-Yip Hon, Kay Teschke, Winnie Chu, Paul Demers and Scott Venners

5. According to the findings of this article, the more healthcare
    job categories responsible for transporting hazardous drugs from
    the drug preparation area to the drug administration units, the
    higher the levels of surface contamination at a facility. True or
    False?

True
False
6. Hazardous drug contamination on work surfaces was found
    only in two departments – the hospital pharmacy where drug
    preparation takes place and the patient administration units.
    True or False?
True
False
An Experimental Study on the Uptake Factor of Tungsten Oxide Particles Resulting from an Accidentally Dropped Storage Container
Zhi Gao, J.S. Zhang and Jerry G.A. Byington

7. Which committed effective dose equivalent (CEDE) value
    does the U.S. DOE limit nuclear worker exposure to during an
    accident involving a stored single container?

a. 2 REM
b. 5 REM
c. 10 REM
d. 20 REM
8. The particle density of tungsten oxide powder is equal to
    its bulk density. True or False?
True
False
Flow Dynamics and Contaminant Transport in Industrial-Type Enclosing Exhaust Hoods
Ertan Karaismail, Ismail Celik and Steven E. Guffey

9. Level of exposure shows an ever increasing trend with
    increasing velocity ratio (V_Crossdraft/V_Face). True or
    False?

True
False
10. At low airflow rates, a worker's body heat may have
      increasing effect on the exposure level. True or False?
True
False
The Impact of Firefighter Personal Protective Equipment and Treadmill Protocol on Maximal Oxygen Uptake
Joo-Young Lee, Ilham Bakri, Jung-Hyun Kim, Su-Young Son and Yutaka Tochihara

11. Wearing firefighter boots as opposed to running shoes
      would be expected to significantly affect VO2max. True or
      False?

True
False
12. Which of the following is not a conclusion the authors
      drew from their work?
a. Assessment of aerobic capacity may require a
          battery of two tests.
b. The Bruce protocol is invalid.
c. Wearing firefighter rubber boots showed no
          significant difference in VO2max compared to
          running shoes.
d. The PIP seems disadvantageous for accurate
          determination of VO2max.

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Deadline for answers is July 31, 2013.

Answers will be available online at
http://www.acgih.org/products/joeh/alanswers.htm
on August 15, 2013.

 
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