Fire Suppression ACTUAL QUESTIONS
AND CORRECT ANSWERS
When firefighters apply water to the hot gas layer in a compartment, it will: (670) [4.3.10]
a. increase the potential for flashover.
b. increase the radiant heat flux from the upper layer.
c. reduce the radiant heat flux from the upper layer.
d. push fire into adjacent rooms. - CORRECT ANSWERS✅✅c. reduce the radiant heat flux
from the upper layer.
What can happen if excess steam is produced inside the structure as a result of applying water
on the fire? (670) [4.3.10]
a. Disruption of the thermal layering
b. Increase in the potential for backdraft or flashover
c. Transition from fuel-limited to ventilation-limited conditions
d. Pyrolysis process speeds up - CORRECT ANSWERS✅✅a. Disruption of the thermal
layering
In which situation would fuel removal be a likely method of extinguishment? (670) [4.3.19]
a. Fire in an apartment building
b. Fire in a one-story house
c. Grass fire
d. Warehouse fire - CORRECT ANSWERS✅✅c. Grass fire
Closing the valve on a natural gas tank to stop the emission of gaseous fuel would be an
example of: (670) [4.310]
a. fuel removal.
b. oxygen exclusion.
c. chemical flame inhibition.
d. temperature reduction. - CORRECT ANSWERS✅✅a. fuel removal.
,When a firefighter controls doors and windows during fire attack, it is an example of: (671)
[4.310, 4.3.11]
a. chemical flame inhibition.
b. temperature reduction.
c. fuel removal.
d. oxygen exclusion. - CORRECT ANSWERS✅✅d. oxygen exclusion.
Clean agents extinguish fire by: (672) [4.3.10]
a. removing oxygen from the compartment.
b. removing the burning fuel.
c. cooling the burning material.
d. Interrupting the combustion reaction. - CORRECT ANSWERS✅✅d. Interrupting the
combustion reaction.
If you are positioned to make fire attack, which condition would be important to
communicate to your supervisor or the Incident Commander? (673) [4.3.10]
a. Smoke that changes from gray to black
b. All team members' PASS devices are functioning
c. Amount of radiant heat felt by firefighters
d. Presence of bystanders at the perimeter - CORRECT ANSWERS✅✅a. Smoke that
changes from gray to black
Firefighters should ensure that PASS devices are on and operating properly: (674) [4.3.10]
a. before entering the structure.
b. once they reach the seat of the fire.
c. before applying water to the fire.
d. once they reach their "point of no return." - CORRECT ANSWERS✅✅a. before entering
the structure.
Which tool or piece of equipment is a member of a fire attack team likely to carry? (674)
[4.3.10]
a. Salvage cover
, b. PPV fan
c. Power saw
d. Hand light - CORRECT ANSWERS✅✅d. Hand light
Before entering the building or fire area, the firefighter who is assigned to the nozzle of the
attack hose should: (674) [4.3.8, 4.3.10]
a. open the nozzle fully to check for adequate flow.
b. wait to call for water until the entry door is propped open.
c. open the nozzle fully once he or she reaches the fire compartment.
d. wait to call for water until they are several steps inside the structure. - CORRECT
ANSWERS✅✅a. open the nozzle fully to check for adequate flow.
What should the attack team do if they open the door to a structure and observe a low neutral
plane and turbulent smoke? (676) [4.3.10]
a. Apply water to the hot gas layer, but stay outside the structure
b. Apply water to the hot gas layer while advancing to the seat of the fire
c. Close the door and use a different entrance to the structure
d. Perform negative pressure ventilation to remove smoke from the compartment -
CORRECT ANSWERS✅✅a. Apply water to the hot gas layer, but stay outside the structure
Why is it dangerous to work below the hot gas layer without attempting to cool it? (677)
[4.3.10]
a. The hot gas layer can break open windows, creating ventilation issues.
b. The hotter the gas layer is, the more toxic the fumes are.
c. The smoke contains fuel, and it may ignite at any time.
d. The hot gas layer will continue to raise and cause damage to the ceiling and floors above. -
CORRECT ANSWERS✅✅c. The smoke contains fuel, and it may ignite at any time.
If a firefighter aims a solid stream at an item that is on fire and applies water until the item is
no longer burning, he or she is using a(an): (677) [4.3.8, 4.3.10]
a. direct attack.
b. indirect attack.
AND CORRECT ANSWERS
When firefighters apply water to the hot gas layer in a compartment, it will: (670) [4.3.10]
a. increase the potential for flashover.
b. increase the radiant heat flux from the upper layer.
c. reduce the radiant heat flux from the upper layer.
d. push fire into adjacent rooms. - CORRECT ANSWERS✅✅c. reduce the radiant heat flux
from the upper layer.
What can happen if excess steam is produced inside the structure as a result of applying water
on the fire? (670) [4.3.10]
a. Disruption of the thermal layering
b. Increase in the potential for backdraft or flashover
c. Transition from fuel-limited to ventilation-limited conditions
d. Pyrolysis process speeds up - CORRECT ANSWERS✅✅a. Disruption of the thermal
layering
In which situation would fuel removal be a likely method of extinguishment? (670) [4.3.19]
a. Fire in an apartment building
b. Fire in a one-story house
c. Grass fire
d. Warehouse fire - CORRECT ANSWERS✅✅c. Grass fire
Closing the valve on a natural gas tank to stop the emission of gaseous fuel would be an
example of: (670) [4.310]
a. fuel removal.
b. oxygen exclusion.
c. chemical flame inhibition.
d. temperature reduction. - CORRECT ANSWERS✅✅a. fuel removal.
,When a firefighter controls doors and windows during fire attack, it is an example of: (671)
[4.310, 4.3.11]
a. chemical flame inhibition.
b. temperature reduction.
c. fuel removal.
d. oxygen exclusion. - CORRECT ANSWERS✅✅d. oxygen exclusion.
Clean agents extinguish fire by: (672) [4.3.10]
a. removing oxygen from the compartment.
b. removing the burning fuel.
c. cooling the burning material.
d. Interrupting the combustion reaction. - CORRECT ANSWERS✅✅d. Interrupting the
combustion reaction.
If you are positioned to make fire attack, which condition would be important to
communicate to your supervisor or the Incident Commander? (673) [4.3.10]
a. Smoke that changes from gray to black
b. All team members' PASS devices are functioning
c. Amount of radiant heat felt by firefighters
d. Presence of bystanders at the perimeter - CORRECT ANSWERS✅✅a. Smoke that
changes from gray to black
Firefighters should ensure that PASS devices are on and operating properly: (674) [4.3.10]
a. before entering the structure.
b. once they reach the seat of the fire.
c. before applying water to the fire.
d. once they reach their "point of no return." - CORRECT ANSWERS✅✅a. before entering
the structure.
Which tool or piece of equipment is a member of a fire attack team likely to carry? (674)
[4.3.10]
a. Salvage cover
, b. PPV fan
c. Power saw
d. Hand light - CORRECT ANSWERS✅✅d. Hand light
Before entering the building or fire area, the firefighter who is assigned to the nozzle of the
attack hose should: (674) [4.3.8, 4.3.10]
a. open the nozzle fully to check for adequate flow.
b. wait to call for water until the entry door is propped open.
c. open the nozzle fully once he or she reaches the fire compartment.
d. wait to call for water until they are several steps inside the structure. - CORRECT
ANSWERS✅✅a. open the nozzle fully to check for adequate flow.
What should the attack team do if they open the door to a structure and observe a low neutral
plane and turbulent smoke? (676) [4.3.10]
a. Apply water to the hot gas layer, but stay outside the structure
b. Apply water to the hot gas layer while advancing to the seat of the fire
c. Close the door and use a different entrance to the structure
d. Perform negative pressure ventilation to remove smoke from the compartment -
CORRECT ANSWERS✅✅a. Apply water to the hot gas layer, but stay outside the structure
Why is it dangerous to work below the hot gas layer without attempting to cool it? (677)
[4.3.10]
a. The hot gas layer can break open windows, creating ventilation issues.
b. The hotter the gas layer is, the more toxic the fumes are.
c. The smoke contains fuel, and it may ignite at any time.
d. The hot gas layer will continue to raise and cause damage to the ceiling and floors above. -
CORRECT ANSWERS✅✅c. The smoke contains fuel, and it may ignite at any time.
If a firefighter aims a solid stream at an item that is on fire and applies water until the item is
no longer burning, he or she is using a(an): (677) [4.3.8, 4.3.10]
a. direct attack.
b. indirect attack.
