IFSTA 7th ch.14 Exam 2023-2024 Questions and Answers 100% Accurate When firefighters apply water to the hot gas layer in a compartment, it will: - ANSWER-
Reduce the radient 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? - ANSWER-Disruption of thermal layering
In which situation would fuel removal be a likely method of extinguishment. - ANSWER-
Grass fire (ground cover fire)
Closing the valve on a natural gas tank to stop the emission of gaseous fuel would be an example of: - ANSWER-Fuel removal
When a fire fighter controls doors and windows during fire attack, it is an example of: - ANSWER-Oxygen exclusion
Clean agents extinguish fire by: - ANSWER-Interrupting the combustion reaction
If you're positioned to make fire attack, which condition would be important tocommunicate to your supervisor or IC - ANSWER-Smoke that changes from grey to black
Firefighters should ensure that pass devices are on and operating properly: - ANSWER-
Before entering the structure
Which tool or piece of equipment is a member of a fire attack team likely to carry - ANSWER-Hand light
Before entering the building or fire area, the firefighter who is assigned to the nozzle of the attack hose should: - ANSWER-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? - ANSWER-Apply water to hot gas layer but stay outside of the structure
Why is it dangerous to work below the hot gas layer without attempting to cool it? - ANSWER-The smoke contains fuel and can ignite at anytime 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): - ANSWER-Direct attack
If a firefighter aims a solid or straight stream at the ceiling so that water will rain down and extinguish the burning item, he or she is using a(an): - ANSWER-Indirect attack
Why should a firefighter be outside the fire compartment when making an indirect attack
from the interior? - ANSWER-A large volume of steam will be created
If a fire fighter uses a "Z" pattern to apply water to the hot gas layer and then the burning fuels at the floor level, he or she is using a(an): - ANSWER-Combination attack
Which type or fire attack involves applying water from the outside of the structure in order to reduce the potential for flash over and make the environment more survivable for interior attack crew? - ANSWER-Transitional attack
When performing transitional attack a _______ stream may be the best choice because it will not upset the thermal layering as much as other stream patterns. - ANSWER-
Straight stream
Which statement describes a safety guideline for operations at a multistory building? - ANSWER-A firefighter must not use elevators to get to the fire floor (though some department SOPs allow it)
Which is a characteristic if fires in residential basements? - ANSWER-Firefighters working on a floor above the basement fire are at increased risk of floor collapse
Which method of attack would put firefighters at the least risk when fighting a residential
basement fire? - ANSWER-Applying water through an exterior basement window
What is an example of protecting interior exposures? - ANSWER-Closing the door between the fire and unaffected area
In a building that is protected by control mode sprinklers, firefighters need to: - ANSWER-Complete suppression before turning system off
Which action would be taken first when performing suppression operations in a structure protected by automatic sprinklers? - ANSWER-Connect pumper to the FDC
At what point should a firefighter close a sprinkler systems main control valve - ANSWER-Once the fire is under control and the IC gives the order
Which is a characteristic of outside screw and yoke valves - ANSWER-The threaded portion of the screw is visible beyond the yoke when the valve is open
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