IFSTA 7TH EDITION CHAPTER 18
EXAMINATION STUDY GUIDE 2026
COMPLETE QUESTIONS AND ANSWERS
◉ When approaching a fire involving a pressurized flammable gas,:.
Answer: there is no angle from which it is safest to approach.
◉ What is a BLEVE?.
Answer: Catastrophic failure of a pressurized vessel
◉ Why are propane tanks an extreme risk to firefighters?.
Answer: The tanks will explode when sufficiently heated.
◉ Which method of foam application involves applying a foam
stream onto an object and allowing the foam to run down the object
onto the surface of the fuel?.
Answer: Bank-Down method
◉ Which type of nozzle produces high quality foam by inducting air
into the foam solution using the Venturi Effect?.
Answer: Foam nozzle
,◉ Which method of foam proportioning involves drawing foam
concentrate through a hose into the water stream using the Venturi
Effect?.
Answer: Eduction
◉ Which type of foam is used to extinguish fires involving flammable
and combustible liquids.
Answer: Class B foam
◉ What is needed to create finished foam?.
Answer: Foam concentrate, water, and aeration
◉ When fire fighting foam extinguishes by _____, it prevents air from
reaching the fuel and prevents release of flammable vapors..
Answer: Smothering
◉ Which method of proportioning water foam uses an external
pump or head pressure to force foam concentrate into the fire
stream at the correct ratio for the water flow.
Answer: injection
, ◉ What would be a first concern at an incident involving
underground pipes containing compressed natural gas or liquefied
petroleum gas?.
Answer: evacuation of area downwind
◉ when pressure vessels contianing gases are exposed to flame
impingement, apply ________ streams from their maximum effective
reach until relief valves close..
Answer: solid streams
◉ which method of proportioning foam uses the pressure energy in
the stream of water to draft foam concentrate into the hose stream.
Answer: Eduction
◉ What flammable gas that is stored in pressurized tanks is also
known as LPG?.
Answer: Propane
◉ Most fire fighting foam concentrates are intended to be mixed
with ________ percent water.
Answer: 94-99.9
◉ A(An) ______ is the most common type of foam proportioner used
in the fire service.
EXAMINATION STUDY GUIDE 2026
COMPLETE QUESTIONS AND ANSWERS
◉ When approaching a fire involving a pressurized flammable gas,:.
Answer: there is no angle from which it is safest to approach.
◉ What is a BLEVE?.
Answer: Catastrophic failure of a pressurized vessel
◉ Why are propane tanks an extreme risk to firefighters?.
Answer: The tanks will explode when sufficiently heated.
◉ Which method of foam application involves applying a foam
stream onto an object and allowing the foam to run down the object
onto the surface of the fuel?.
Answer: Bank-Down method
◉ Which type of nozzle produces high quality foam by inducting air
into the foam solution using the Venturi Effect?.
Answer: Foam nozzle
,◉ Which method of foam proportioning involves drawing foam
concentrate through a hose into the water stream using the Venturi
Effect?.
Answer: Eduction
◉ Which type of foam is used to extinguish fires involving flammable
and combustible liquids.
Answer: Class B foam
◉ What is needed to create finished foam?.
Answer: Foam concentrate, water, and aeration
◉ When fire fighting foam extinguishes by _____, it prevents air from
reaching the fuel and prevents release of flammable vapors..
Answer: Smothering
◉ Which method of proportioning water foam uses an external
pump or head pressure to force foam concentrate into the fire
stream at the correct ratio for the water flow.
Answer: injection
, ◉ What would be a first concern at an incident involving
underground pipes containing compressed natural gas or liquefied
petroleum gas?.
Answer: evacuation of area downwind
◉ when pressure vessels contianing gases are exposed to flame
impingement, apply ________ streams from their maximum effective
reach until relief valves close..
Answer: solid streams
◉ which method of proportioning foam uses the pressure energy in
the stream of water to draft foam concentrate into the hose stream.
Answer: Eduction
◉ What flammable gas that is stored in pressurized tanks is also
known as LPG?.
Answer: Propane
◉ Most fire fighting foam concentrates are intended to be mixed
with ________ percent water.
Answer: 94-99.9
◉ A(An) ______ is the most common type of foam proportioner used
in the fire service.
