Field Evaluation of Methods for Determining the Obstructed Section of Branches of Industrial Ventilation Systems
Derrick W. Booth, Sr. and Steven E. Guffey
1. The Reference Ratio, Static Pressure Location, and the X Value
Hood Section Methods are useless in determining obstructions
when combined with its respective screening method.
True or False?
True
False
2. The use of Receiver Operator Characteristic (ROC) Curves allows
for the sensitivity and specificity of method to be viewed over
a large range of thresholds simultaneously.
True or False?
True
False
Influence of Wear, Pile Height, and Cleaning Method on Removal of Mite Allergen from Carpet
Simon M. Causer, Roger D. Lewis, Joseph M. Batek, Sr., and Kee-Hean Ong
3. Use of a single wet or a dry vacuum extraction process is likely
to lead to removal of the vast majority of mite allergen present
in a 4 5 year old domestic carpet. True or False?
True
False
4. Increasing carpet wear:
a. Has no influence on ease of house dust mite allergen removal by both dry and wet vacuum extraction.
b. Results in decreased removal of house dust mite allergen by dry, but not wet vacuum extraction.
c. Reduces efficiency of house dust mite allergen removal by both dry and wet vacuum extraction.
d. Leads to improved house dust mite allergen removal rates using both dry and wet vacuum extraction.
Noise Exposure of Music Teachers
Alberto Behar, Ewen MacDonald, Jason Lee, Jie Cui,Hans Kunov, and Willy Wong
5. The authors have chosen to assess the noise exposure of music
teachers because:
a. The acoustics of classrooms is considered as
deficient in most cases
b. There are very few studies on teachers' noise
exposure.
c. Teachers are exposed to loud sounds generated
by music instruments
d. There is a need for justifying the 3 dB exchange
rate as opposed to the 5 dB
e. Teachers should be convinced to wear hearing
protectors
6. The authors are using two estimates: Leq and Lex because:
a. Leq is equal to TWA when using the 3 dB
exchange rate
b. Lex is numerically smaller than Leq
c. Lex represents the daily noise exposure level
d. Lex is easier to use, when combining several
noise exposures
e. Leq is more widely used and, therefore, people
are more familiar with its use.
Physical Work Limits for Toronto Firefighters in Warm Environments
G.A. Selkirk and Tom McLellan
7. The fall in heart rate that occurs during passive recovery following
work in
firefighting protective clothing in warm environments
is indicative of the change in body temperature over the same
time period. True or False?
True
False
8. The impact of higher ambient temperatures on work performance
while wearing
firefighting protective clothing is more evident
during lighter rather than heavier work. True or False?
True
False
Estimating Personal Exposures Based Upon Mass Balance Material Usage Rates: Validation of a Ventilation Model in a Spray Paint Booth
Jon R. Taylor, Patrick T. O'Shaughnessy, and Stephen J. Reynolds
9. A correction factor can be applied to a known ventilation rate to
better estimate the contaminant diluting effect of the ventilation
rate in an industrial setting. Which of the following is not true
concerning this correction factor?
a. A value for the factor can be chosen knowing
the geometry of the ventilated room and
associated inlet and exhaust locations.
b. It is sometimes referred to as an "effectiveness"
factor
c. Use of this factor is only applicable if one
assumes that the room is composed of a
single well mixed compartment.
d. This factor can be calculated by determining the
intercept of the linearized exponential decay
equation.
e. This factor is applied because, typically, the
dilution rate of a contaminant in a room is slower
than expected from calculations involving the
actual ventilation rate.
10. A model that incorporates the input/output relationship of a
substance in an
industrial process is known as a
model.
Fitting Characteristics of Eighteen N95 Filtering-Facepiece Respirators
Christopher C. Coffey, Robert B. Lawrence, Donald L. Campbell, Ziqing Zhuang, Catherine A. Calvert, and Paul A. Jensen
11. Passing a respirator fit test assures that workers will achieve an
appropriate level of protection. True or False?
True
False
12. Passing any of the five fit test methods ensures the same level of
protection for a particular respirator. True or False?
True
False
