CSU BOS4301 Unit 7 Assessment Latest 2019 March Question # 00601069 Subject: Education Due on: 05/08/2019 Posted On: 05/08/2019 12:36 PM Tutorials: 1 Rating: 4.9/5
BOS4301 Industrial Hygiene
Unit 7 Assessment
QUESTION 1 A plant that manufactures
automobile chassis includes a production area containing 100 robotic welding
stations. An adjacent area contains 10 welding booths where employees perform
hand welding using MIG welders to rework welds that have been identified as
unacceptable. Personal air sampling shows that personal exposures at 5 of the
welding booths located in the middle of the rework exceed the OSHA PEL for
lead, nickel, and iron oxide fumes. On average, the personal exposures exceed
the applicable OSHA PEL by 2-3 times.
Your response must be at least 200 words in
length.
QUESTION 2 Employees in the paint
department of an automotive parts production facility use styrene to clean
residue off the parts as they come off the paint line. The OSHA PEL for styrene
is 100 ppm as an 8-hour TWA exposure. Personal air samples show that during
peak production times, exposures range from 150 ppm to 200 ppm for an 8-hour
shift. The parts cleaning is performed in a small room with one door.
Your response must be at least 200 words in
length.
QUESTION 3 A press area of a plant has six
400-ton presses in operation 24 hours a day, 7 days a week. Personal monitoring
using noise dosimeters has shown that 8-hour time-weighted average (TWA)
exposures range from 92.0 dBA to 94.5 dBA.
Your response must be at least 200 words in
length.
QUESTION 4 A plant has an operation that
produces automotive headliners in a press. The process uses a compound that
contains methylene bisphenyl isocyanate (MDI). The compound containing MDI must
be used in the production process to meet the client’s specifications for the
headliner. The OSHA PEL for MDI is 0.02 ppm as a ceiling concentration.
Personal air samples collected for 15 minutes at the time when the press opens
show that short-term exposures range from 0.02 ppm to 0.06 ppm.
Your response must be at least 200 words in
length.
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