OPNAVINST 5100.19E B2 - Heat Stress Flashcards
What device provides values that provide values representing radiant and convection heat transfers to or from the body?
Globe thermometer
What are the three temperature readings needed to obtain accurate and reliable date on heat stress conditions?
Dry-bulb (DB)
Wet-bulb (WB)
Globe temperature (GT)
What does the navy use to measure dry bulb, wet-bulb, and globe temperatures?
WBGT meter or the automated heat stress system (AHSS)
What does the acronym PHEL stand for?
Physiological Heat Exposure Limits
What two things are used to determine how long an individual may be exposed safely to heat stress conditions/PHEL?
WBGT index and physical exertion level
How many WBGT meters must be on-board a ship that is without an automated heat stress system (AHSS)?
two
How many WBGT meters must be on-board a ship with an automated heat stress system(AHSS)?
one
What formula is used to validate WBGT index readings?
WBGT = (1.0 x DB) + (0.7 x WB) + (0.2 x GT)
At least how many feet must DB thermometers be hung from ventilation openings?
two feet
A temperature difference of how many degrees between the DB reading of the WBGT meter and the hanging DB thermometer indicates that the hanging DB is not representative of the temperature in the workstation?
five degrees or greater
At what temperature do dry-bulb thermometers need to be monitored every hour?
above 85 degrees
At what temperature do dry-bulb thermometers need to be monitored every four hours?
85 degrees and below
When do dry bulb temperatures need to be circled in red on the temperature recording log?
exceeds 100 degrees - 4 hours or less
exceeds 90 degrees - more than 4 hours
exceeds 85 degrees in scullery
How long must the WBGT meter be in the work-space prior to conducting the first measurement?
five minutes
After the first reading with the WBGT meter, if it is moved, how long must the surveyor wait before conducting a measurement?
three minutes
The manual calculation of the WBGT index needs to be within how many degrees of the WBGT meter/AHSS findings?
0.2 degrees
In a work station with a stay time of 4 hours or less and a PHEL I-III, what DB reading requires a heat survey?
100 degrees or above
In a work station with a stay time greater than 4 hours and a PHEL I-III, what DB reading requires a Heat Survey?
90 degrees or above
At what DB reading is a heat survey required in a watch/work station with a PHEL of IV - VI?
85 degrees and above
What should the DB temperature of the space being used for recovery for personnel who have reached their heat exposure limit?
80 degrees or less
What should the length of recovery time be for personnel that have reach their heat exposure limit?
equal to twice the exposure time or four hours, whichever is less
Where are heat related injuries reported by the MDR?
Web-enabled safety system (WESS)
How many PHEL curves are there?
six
What percentage of cotton fiber should the clothing of personnel working in heat stress environments contain?
35 percent
