IFSTA 7TH EDITION CHAPTER 18 EXAM
SCRIPT FINAL PAPER 2026 FULL SOLUTION
VIEW AHEAD
◉ what is an advantage of using fog nozzles for applying foam.
Answer: may allow for variable flow and pattern of application
◉ what is a disadvantage of using fog nozzles to produce finished
foam.
Answer: may create the appearance of better flow than is actually
being produced
◉ why is it important to thoroughly flush equipment after foam
production.
Answer: foam concentrates have solvent characteristics and are
mildly corrosive
◉ fog nozzles can be used with foam solutions to produce a ________
foam.
Answer: low-expansion, short-lasting
◉ what is an advantage of foam nozzles.
,Answer: typically produces higher quality foam than fog nozzles
◉ what occurs when a closed container such as a pressure vessel is
heated and the liquid inside expands returning to a gaseous state
and increasing internal pressure on the vessel?.
Answer: boiling liquid expanding vapor explosion (BLEVE)
◉ most Class A foams are mixed in proportions of.
Answer: 1 percent or less
◉ what should be the first action taken at a class b fire.
Answer: determine the wind direction
◉ which type of foam proportioner can compromise safety because
firefighters may not be able to move quickly and may have to leave
concentrate supplies behind if retreating.
Answer: foam nozzle eductor
◉ which type of foam proportioner can be mounted on many types
of fire ighting apparatus and uses water that is supplied by a
standard centrifugal pump?.
Answer: compressed air form systems (CAFS)
, ◉ which foam application technique may be employed when an
elevated object is near or within the area of a burning pool of liquid
or an unignited liquid spill.
Answer: bank down method
◉ which foam application technique should be used only on a pool
of ignited or unignited liquid fuel on the open ground.
Answer: roll on method
◉ which elements must be blended in the correct ratio to produce
finished foam.
Answer: foam concentrte, water air
◉ when producing foam, what is required to produce uniform sized
bubbles that provide a longer lasting blanket.
Answer: aeration
◉ which is a disadvantage of foam nozzles.
Answer: limited reach compared to other nozzles
◉ starting and stopping foam application.
Answer: may allow the fire to consume whatever foam blanket has
been established
SCRIPT FINAL PAPER 2026 FULL SOLUTION
VIEW AHEAD
◉ what is an advantage of using fog nozzles for applying foam.
Answer: may allow for variable flow and pattern of application
◉ what is a disadvantage of using fog nozzles to produce finished
foam.
Answer: may create the appearance of better flow than is actually
being produced
◉ why is it important to thoroughly flush equipment after foam
production.
Answer: foam concentrates have solvent characteristics and are
mildly corrosive
◉ fog nozzles can be used with foam solutions to produce a ________
foam.
Answer: low-expansion, short-lasting
◉ what is an advantage of foam nozzles.
,Answer: typically produces higher quality foam than fog nozzles
◉ what occurs when a closed container such as a pressure vessel is
heated and the liquid inside expands returning to a gaseous state
and increasing internal pressure on the vessel?.
Answer: boiling liquid expanding vapor explosion (BLEVE)
◉ most Class A foams are mixed in proportions of.
Answer: 1 percent or less
◉ what should be the first action taken at a class b fire.
Answer: determine the wind direction
◉ which type of foam proportioner can compromise safety because
firefighters may not be able to move quickly and may have to leave
concentrate supplies behind if retreating.
Answer: foam nozzle eductor
◉ which type of foam proportioner can be mounted on many types
of fire ighting apparatus and uses water that is supplied by a
standard centrifugal pump?.
Answer: compressed air form systems (CAFS)
, ◉ which foam application technique may be employed when an
elevated object is near or within the area of a burning pool of liquid
or an unignited liquid spill.
Answer: bank down method
◉ which foam application technique should be used only on a pool
of ignited or unignited liquid fuel on the open ground.
Answer: roll on method
◉ which elements must be blended in the correct ratio to produce
finished foam.
Answer: foam concentrte, water air
◉ when producing foam, what is required to produce uniform sized
bubbles that provide a longer lasting blanket.
Answer: aeration
◉ which is a disadvantage of foam nozzles.
Answer: limited reach compared to other nozzles
◉ starting and stopping foam application.
Answer: may allow the fire to consume whatever foam blanket has
been established
