Download IFSTA 7th Edition - Chapter 11: Tactical ventilation 69 Review Questions With Answers and more Exams Safety and Fire Engineering in PDF only on Docsity!
IFSTA 7th Edition - Chapter 11: Tactical
ventilation 69 Review Questions With
Answers
When ventilating metal roofs which type of roof can be sliced open with an axe, carbide tip chain saw, or rotary saw and peeled back? (519) - โ โ Thin metal roofs
What is the purpose of a trench cut? (520) - โ โ Create a defensible line ahead of the fire's spread
For what situation would an incident commander order a trench cut? (520) - โ โ The main fire is too large to extinguish
Horizontal ventilation can be employed effectively in a basement if the basement: (523) - โ โ Has ground level windows or below ground level windows in wells
What type of nozzles can be used before ventilation to reduce the risks associated with ventilating a windowless basement? (523) - โ โ Piercing nozzles
The feasibility of opening a floor during firefighting depend on how it was constructed and: (523) - โ โ From what material it was constructed
Fires in windowless buildings usually require ________ ventilation for removal of smoke. (523) - โ โ Mechanical
What has an even higher priority in high-rise buildings because they often have more occupants than other structures? (525) - โ โ Life safety
For what type of fires can fire, smoke, and toxic gases spread rapidly through pipe chases, stairways, elevator shafts, and unprotected ducts? (525) - โ โ High-rise fires
The ________ effect occurs when heated smoke and fire gases travel upward and then spread horizontally and stratify. (525) - โ โ Stack
When an enclosed secondary stairwell is used for evacuating occupants, what should be located at the bottom floor to pressurize the stairwell and keep smoke from entering it? (526) - โ โ PPV fans
The Fire Fighter I has the responsibility to: (502) - โ โ Communicate observations about performing ventilation
Which structural element may contribute to roof failure during a fire? (502) - โ โ Lightweight roof trusses
Which is indication of possible roof collapse? (503) - โ โ HVAC units sagging or leaning
What can be used to monitor the impact of ventilation and identify possible ventilation locations? (504) - โ โ Thermal imagers
What ventilation tool would be used to break windows or chop holes through roof decking? (504) - โ โ Axes
Which air movement equipment is used for hydraulic ventilation? (505)
- โ โ Hoselines and nozzles
Mechanical ventilation is designed to: (508) - โ โ Supplement effects of natural ventilation
Which type of ventilation is the most effective for clearing contaminated structures of smoke? (508) - โ โ Mechanical ventilation
Firefighters should continue to wear SCBA and monitor the environment until: (508) - โ โ The atmosphere is confirmed to be safe
Negative-pressure ventilation requires that the opening around the fan: (509) - โ โ Be sealed to prevent outside air from being drawn in around the fan
Positive-pressure attack is only effective if the location of the fire is known and: (510) - โ โ The appropriate exhaust-to-intake ratio (greater than 1 to 1) can be achieved
When performing a positive-pressure attack, the exhaust openings must be located: (510) - โ โ In the fire compartment
What is the goal of positive-pressure ventilation? (511) - โ โ Increase pressure to higher than the exterior of the structure, not higher than the fire can produce
When performing positive-pressure ventilation: (512) - โ โ Firefighters can set up PPV blowers without entering the smoke-filled environment
When performing positive-pressure ventilation in commercial and multistory buildings, a main problem in aboveground operations is
coordinating the: (513) - โ โ Opening and closing doors in stairwells used to ventilate the building
Which type of ventilation may be used in situations where other types of forced ventilation are unavailable? (513) - โ โ Hydraulic ventilation
When performing hydraulic ventilation, set the fog nozzle on a pattern: (513) - โ โ Wide enough to cover the exhaust opening
Which is a disadvantage of hydraulic ventilation? (513) - โ โ Firefighters operating nozzle must remain in heated, hazardous atmosphere throughout operation
Which would be an example of vertical ventilation? (514) - โ โ Cutting a hole in the roof above the fire
What is needed for vertical ventilation to be effective? (514) - โ โ Horizontal inlet opening at or below fire level
Which is an increased risk of performing vertical ventilation? (514) - โ โ Working on peaked and flat roof surfaces
A safety precaution when performing vertical ventilation is to work: (515) - โ โ With the wind at your back or side to protect yourself from heat, smoke, and embers
When performing vertical ventilation, extend ground ladders at least _____ rungs above the edge of the roof or tope of the parapet wall (515) - โ โ Three
Before interior attack, what action will reduce oxygen available to the fire? (495) - โ โ Closing exterior doors and windows
What occurs when fresh air (oxygen) from ventilation is introduced into a room, causing gases to reignite and rapid fire development to occur? (495) - โ โ Flashover
The primary mode of heat transfer from one compartment to another in a structure fire is: (497) - โ โ Convection
Water application to a fire compartment begins to transition the fire from: (498) - โ โ Ventilation-limited to fuel-limited conditions
When coordinating ventilation with search and rescue, ventilation should be delayed until: (499) - โ โ Lines are charged and crews are ready
Which is a reason for ventilation during overhaul? (499) - โ โ Minimizing property damage to the greatest extent possible
Which is a condition specific to tactical ventilation that should be communicated to crew members and/or a supervisor? (500) - โ โ Locations of overhead power lines
Tactical ventilation roof crew members should have a minimum of: (500) - โ โ Two escape locations
Which is an assumption firefighters should make about any structure fire to guide their decisions when ventilating? (500) - โ โ Structure consists of lightweight construction
When wind speeds are 10 mph (15 kph) or faster, firefighters are safest working: (501) - โ โ With the wind at their backs
When ventilation does not release heat and smoke directly above the fire,: (501) - โ โ Some routing of smoke becomes necessary
Nearby structures and vegetation can be ignited if ________ carries hot fire brands or embers aloft. (502) - โ โ Convection
The roof ventilation team leader is responsible for ensuring at least _______ means of egress from the roof. (517) - โ โ Two
Cutting an inspection hole helps determine: (518) - โ โ The location of the fire
Which inspection hole is made by making a single cut in the roof surface using a rotary saw, chain saw, or axe? (518) - โ โ Kerf cut
When ventilating flat roofs, the most common openings are: (518) - โ โ Square and rectangular
When ventilating shingle-covered pitched roofs, always cut the exhaust openings: (519) - โ โ At of very near the highest point of the roof, when possible
