Structural PPE Safety and Training
Chapter 7: Using Your PPE Safely
What are the three types of heat transfer?
Compression, conduction and thermal radiation
Conduction, convection and thermal radiation
Conduction, compression and thermal radiation
Conduction, convection and nuclear radiation
Which type of heat transfer is described as the transfer of heat caused by two bodies touching?
If you feel burns developing what should you do?
Burning sensations may begin long before skins burns; therefore continue working for 5 minutes to see if the sensation stops
Fabrics used in PPE have been tested to well over 1200°F, so unless the fire is really hot you shouldn’t worry about burning sensations
Check your PPE to see if any shows signs of damage, if not it is safe to continue working
Escape to a cool place and remove your PPE
What is the temperature skin must reach before it begins to burn?
What is stored energy and what is the danger?
Heat build-up in structural fire fighting PPE over a period of time, which can cause burns when wet and/or compressed
Consumption of calories in excess of those used in physical activity, which could lead to obesity
Heat build-up in a fire environment that results in flashover, which could lead to injury or death
Electrical current associated with an uncapped, poorly spliced or cut wire, which could lead to electrocution if touched
Fire fighters who are exposed to flashover or other high heat environments are:
Only at risk for extensive burn injuries or death if their coat closures are not properly fastened and/or they have not donned a protective hood
Protected as long as they are properly wearing their NFPA 1971 compliant PPE
At extreme risk for extensive burn injuries and death even while wearing their NFPA 1971 compliant PPE
Likely to become public heroes especially if the media is present
What should you do if your PPE has received an extreme exposure?
Perform routine cleaning and routine inspection; request an advanced inspection if there is visible damage
Always have an advanced inspection performed
Have an advanced inspection performed if you suspect the exposure exceeded temperature to which the fabric was tested
Perform a routine inspection; request an advanced inspection if there is visible damage
What happens when you squeeze the layers of your structural fire fighting gear?
It collapses the pores in the moisture barrier that provides water resistance; which is called psi
It collapses the air pockets that provide insulation; which is called compression
It collapses liquid molecules produced by sweat and water so they become small enough to move through the moisture barrier; which is called moisture barrier penetration
None of the above
What can you do to minimize compression burns on your knees?
Switch from knee to knee while kneeling
Squatting instead of kneeling when you are able
Shift your weight from side to side when you must be on both knees
All of the above
Why is water dangerous inside your PPE?
It displaces the insulated air and provides a conductive bond between you and hot surfaces that you might not otherwise touch
Gear shrinks when it is wet and exposed to high temperatures
Water molecules fill up the pores in your moisture barrier, which makes it less breathable and hotter to work in
Most water has chemical compounds left from the filtering process; this includes chlorine which can damage the fibers in your gear
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