AND ANSWERS GUARANTEE A+
✔✔What extinguisher is used to fight off a Class C fire? - ✔✔Dry Chemical, CO2, Halon
and Some Halon Replacements
✔✔What extinguisher is used to fight off a Class D fire? - ✔✔Dry chemical
✔✔What extinguisher is used to fight off a Class K fire? - ✔✔Wet Chemical
✔✔What is a pressurized water extinguisher used for? - ✔✔-class "A' fire only
-can be started and stopped as necessay
-extinguishes by cooling burning material below the ignition point
✔✔What is a carbon dioxide extinguisher used for? - ✔✔-class "B" or "C" fire
-has no pressure gauge
-extinguishes by smothering burning materials
-effectiveness decreases as temperature of burning material increases
✔✔What is a foam extinguisher used for? - ✔✔-prevents re-ignititon of fires
-exceptional penetrating ability for class "A" fires
-liquid based- no powder or gas
✔✔What is a combustible metal extinguisher used for? - ✔✔-class "D" combustable
metal fires
-extinguishes by smothering burning materials
✔✔What is a wet chemical extinguisher used for? - ✔✔-class "A', "C", and "K" fire
-on class "K" fires, don't use until after fixed extinguishing system has activated
-extinguishes by cooling and forming foam blanket to prevent resignation
✔✔What does PASS stand for? - ✔✔Pull the pin, Aim low at the base of flames,
squeeze the handle, Sweep side to side
✔✔What are the typical fixed systems? - ✔✔-carbon dioxide
-sprinkler (wet and dry risers)
-foam (low snd high expansion)
-fire mains, hydrants
-pressure water spray in special in special category spaces
-Halon
✔✔What are some advantages of CO2? - ✔✔-does not leave residue after use
-primarily effective on class B or C fires
-some other typical application: food preparation, laboratories, printing or duplicating
areas
, ✔✔What are some some dangers of CO2? - ✔✔-cannot be used in confined spaces as
gas reduces the amount of oxygen in the area
✔✔What does the sprinkler system consist of? - ✔✔-a network of sprinkler heads
located at dedicated areas, which needs extra protection
-generally fixed in accommodation areas and machinery spaces
✔✔What are synthetic foams? - ✔✔based on synthetic surfactants, provide better flow,
faster knockdown of flames, but limited post-fire security
✔✔What are Protein Foams? - ✔✔contains natural proteins as foaming agents, unlike
other synthetic foams, proteins forms are bio-degradable
✔✔What does a shipboard fire station contain? - ✔✔-fire hose
-two attachment points, can be a Y-Gate
-Navy All-Purpose Nozzle
-Spanner Wrench
✔✔What is typically in a Fire Station? - ✔✔-hose should always be attached to hydrant
with nozzle connected: 2 1/2" fire hoses exterior on deck and 1 1/2" fire hose interior
spaces
-Navy All-Purpose Nozzle
-Vari Nozzle
✔✔Navy All-Purpose Nozzle - ✔✔-solid steam, high velocity fog, low velocity fog when
used with applicator
✔✔Vari Nozzle - ✔✔-Bale turns it on and off
-twist nozzle to vary the pattern, twist to the right for a straight stream and to the left for
a wide low velocity fog pattern
✔✔Fog Applicators - ✔✔-both high and low velocity extinguish fire by absorbing heat
-can possibly help by reducing, but not eliminating the supply of oxygen
-are used with the all purpose nozzle
- there are three types: 60 deg 4 ft, 90 deg 10 ft, 90 deg 12 ft
✔✔What is the difference between high velocity and low velocity? - ✔✔high- narrow
pattern used to put out fires
low- wide pattern used as a heat shield
✔✔What is a hose thread? - ✔✔-the threading on fire hoses is a particular type unique
to fire hoses
-male end is the end that has the thread
-female end is the end that has the thread on the inside