TB Purple K Flashcards
Purple K is a _ base dry chemical
Potassium bicarbonate
Purple K is also effective on “MGD Cans”
Methanol, Gasoline, Diesel, Compressed gas fires
Used Purple K Cans exchanged w/_
Purple K extinguisher checked _
Tech Services Attach RT-2
Beginning of tours & thoroughly examined monthly
Proper application technique for Purple K
Approach from upwind w/noz at 45 degree angle to ground. Stop 10-12’ from front edge of fire- direct stream 6” ahead of fire using rapid side to side motion
Flammable liquid pressure fire- approach from upwind side & stop _’. Knock out the fire from (top/bottom) first.
15’ from front edge of spill area; Direct at fuel source up to down for liquid pressure fires. May not be desirable to extinguish unless fuel supply can be shut off first
LPG fires using water & Purple K- is water applied 1st or Purple K applied first
Open water nozzle 1st using fog position, then open Purple K & direct at stream at fuel source
LPG vapors are (lighter/heavier) than air
Heavier & flow downwind considerable distances. LPG fires should NOT be extinguished unless immediate fuel shutoff possible
T/F Purple K is very successful on extinguishing all types of aircraft fuel- Always use in conjunction w/Fluroprotein on aircraft fuels
True- use on Class B (including alcohol) & Class C fires
Temperature restrictions for Purple K
-40 F to 120 F
Purple K is superior on _ fires
Methanol fires (alt fuel for gasoline & diesel powered vehicles & equipment)
Incorrect?
A: Two (2) Purple K Units and the associated engine companies will respond upon the transmission of a 10-86 signal but not on a 10-87 signal.
B: Purple K is a very successful extinguishing agent for use on all types of aircraft fuels.
C: Purple K should always be used in conjunction with Flouroprotein foam when used on aircraft fuels.
D: Purple K may be applied in conjunction with a fog or straight stream to give it more reach. The dry chemical travels as far as the stream carrying it will go.
D. TB Purple K add 1 sect 1.3.6 - May be applied in conjunction with a FOG stream (not a STRAIGHT stream) to give it more reach.
A. Comm Manual Ch 8-p 24
B & C TB Purple K add 1 sect 1.2.1
Purple K extinguisher correct
A. 45 degree angle to ground & use a rapid side-side sweeping motion
B. 60 degree angle w/rapid side-side motion
C. 45 angle to ground w/slow side to side sweeping motion
D. 60 degree angle w/slow side to side motion
A pg 4
Purple K superior for methanol fires. Incorrect
A. Discharge range 19-20’
B. Discharge time 11 seconds
C. Coverage approx 30 sq feet
D. Can be used only between 32 & 120 degrees F. Cannot be used below freezing temps
D -40 to 120 degrees F. No need to worry about freezing temps
2.2
Incorrect for Purple K extinguisher at a flammable liq spill
A. Fire should be approached from the upwind side holding the noz at 90 degree angle to ground. Stop at a point 15’ from the front edge of the fire area
B. Stream should initially be directed 6” ahead of the flame edge, or at the upwind corner of the fire 6” ahead of the lip if in depth
C. A rapid side to side sweeping motion shall be used
D. Each sweep of the stream must be slightly wider than the near edge of the fire, or the pan in depth
E. Noz shall not be raised to chase a fire ball. When in depth, to raise the stream the extinguisher shall be raised rather than the nozzle
A Noz at 45 degree angle 10-12’ from front edge of fire area
4.1 4.3
Purple K Unit incorrect
A. Purple K can be used on all types of aircraft fuels, & is recommended for use on Class B fires including alcohol & Class C fires
B. Purple K Unit can be used to extinguish LNG, LPG, & pressurized gas fires in conjunction with use of fog noz
C. Purple K should always be used in conjunction with AFFF foam when used on aircraft fuels
D. Purple K is especially designed for use on 3D fires or flange fires
C Purple K is always used in conjunction with Fluroprotein foam when used on aircraft fuels
Add 1 1.2.1
