1
IFSTA CHAPTER 18 (2025) COMPREHENSIVE
QUESTIONS AND VERIFIED DETAILED SOLUTIONS (
MULTIPLE CHOICES) |100% CORRECT!!
Which is an appropriate safe action to take at an incident involving a BLEVE?
Select one:
a.Apply fire fighting foam at a close range
b.Approach the vessel at the ends of the tank
c.Fight fire from the maximum distance possible
d.Attempt to open the vessel's pressure relief valve - (ANSWER)c.Fight fire from
the maximum distance possible
In order to create high-quality foam:
Select one:
a.foam concentrate, water, and air must be mixed in the correct ratio.
b.a foam nozzle must be used.
c.a fog nozzle must be used.
d.foam solution and water must be premixed and allowed to rest before
application. - (ANSWER)a.foam concentrate, water, and air must be mixed in the
correct ratio.
What action should be taken if a pressurized vessel containing flammable gas is
exposed to flames?
Select one:
a.Apply a fog stream of water
, 2
b.Apply foam using the roll-on method
c.Apply foam using the bank-down method
d.Apply a solid stream of water - (ANSWER)d.Apply a solid stream of water
Which method of foam application would be well suited for a flammable liquid
spill near the exterior wall of a building?
Select one:
a.Spread-over method
b.Rain-down method
c.Roll-on method
d.Bank-down method - (ANSWER)d.Bank-down method
Class B foams are especially effective on:
Select one:
a.hydrocarbon fuels.
b.energized electrical equipment.
c.surfactants.
d.ordinary combustibles. - (ANSWER)a.hydrocarbon fuels.
Class A foam acts as a surfactant, which means that it:
Select one:
a.requires a special type of aeriation tool to be formed.
, 3
b.raises the surface tension of water, creating a more effective extinguishing
agent.
c.requires a special type of nozzle for application.
d.lowers the surface tension of water, allowing better penetration into the fuel. -
(ANSWER)d.lowers the surface tension of water, allowing better penetration into
the fuel.
What is likely to cause poor quality fire fighting foam to be produced?
Select one:
a.Mixing different types of foam concentrates in the same tank
b.Nozzle is too far below the eductor
c.Nozzle is fully opened
d.Hose lay on the eductor side is not long enough - (ANSWER)a.Mixing different
types of foam concentrates in the same tank
What is necessary when applying fire fighting foam?
Select one:
a.A vapor protective suit and SCBA
b.A hazardous materials team standing by
c.Continued, uninterrupted application until extinguishment
d.Intermittent application breaks to allow the foam to settle -
(ANSWER)c.Continued, uninterrupted application until extinguishment
IFSTA CHAPTER 18 (2025) COMPREHENSIVE
QUESTIONS AND VERIFIED DETAILED SOLUTIONS (
MULTIPLE CHOICES) |100% CORRECT!!
Which is an appropriate safe action to take at an incident involving a BLEVE?
Select one:
a.Apply fire fighting foam at a close range
b.Approach the vessel at the ends of the tank
c.Fight fire from the maximum distance possible
d.Attempt to open the vessel's pressure relief valve - (ANSWER)c.Fight fire from
the maximum distance possible
In order to create high-quality foam:
Select one:
a.foam concentrate, water, and air must be mixed in the correct ratio.
b.a foam nozzle must be used.
c.a fog nozzle must be used.
d.foam solution and water must be premixed and allowed to rest before
application. - (ANSWER)a.foam concentrate, water, and air must be mixed in the
correct ratio.
What action should be taken if a pressurized vessel containing flammable gas is
exposed to flames?
Select one:
a.Apply a fog stream of water
, 2
b.Apply foam using the roll-on method
c.Apply foam using the bank-down method
d.Apply a solid stream of water - (ANSWER)d.Apply a solid stream of water
Which method of foam application would be well suited for a flammable liquid
spill near the exterior wall of a building?
Select one:
a.Spread-over method
b.Rain-down method
c.Roll-on method
d.Bank-down method - (ANSWER)d.Bank-down method
Class B foams are especially effective on:
Select one:
a.hydrocarbon fuels.
b.energized electrical equipment.
c.surfactants.
d.ordinary combustibles. - (ANSWER)a.hydrocarbon fuels.
Class A foam acts as a surfactant, which means that it:
Select one:
a.requires a special type of aeriation tool to be formed.
, 3
b.raises the surface tension of water, creating a more effective extinguishing
agent.
c.requires a special type of nozzle for application.
d.lowers the surface tension of water, allowing better penetration into the fuel. -
(ANSWER)d.lowers the surface tension of water, allowing better penetration into
the fuel.
What is likely to cause poor quality fire fighting foam to be produced?
Select one:
a.Mixing different types of foam concentrates in the same tank
b.Nozzle is too far below the eductor
c.Nozzle is fully opened
d.Hose lay on the eductor side is not long enough - (ANSWER)a.Mixing different
types of foam concentrates in the same tank
What is necessary when applying fire fighting foam?
Select one:
a.A vapor protective suit and SCBA
b.A hazardous materials team standing by
c.Continued, uninterrupted application until extinguishment
d.Intermittent application breaks to allow the foam to settle -
(ANSWER)c.Continued, uninterrupted application until extinguishment
