7-Ops-5.2 Hoselines Flashcards
According to the BFES Operations Manual, What does NFPA 1710 recommend regarding flow rates for different occupancies?
a. 500 lpm for all occupancies
b. Different flow rates for different occupancies
c. 1000 lpm for all occupancies
d. No specific recommendations
B
The proper flow rate must be selected to extinguish the fire. NFPA 1710 recommends flow rates for different occupancies.
According to the BFES Operations Manual, What flow rates does BFES utilize for their 45mm attack line?
a. 500 lpm
b. 1000 lpm
c. 565 lpm
d. 1140 lpm
C
BFES utilizes 45mm and 65mm attack lines, each flowing 565 lpm (150 gpm) and 1006 lpm (266 gpm) respectively when supplied proper pressures.
According to the BFES Operations Manual, How much water flow is recommended for a typical 2000 square foot, two-story single-family dwelling without basement or exposures?
a. 500 lpm
b. 1000 lpm
c. 1140 lpm
d. 1892 lpm
C
For a typical 2000 square foot, two-story single-family dwelling home without basement or exposures: Establishment of 1140 lpm (300 gpm) from two handlines.
According to the BFES Operations Manual, For a High-Rise building greater than 75 ft, what is the recommended establishment of flow rates on the fire floor and the floor above?
a. 1140 lpm on the fire floor, 946 lpm on the floor above
b. 1892 lpm on the fire floor, 946 lpm on the floor above
c. 565 lpm on the fire floor, 1006 lpm on the floor above
d. 1006 lpm on the fire floor, 565 lpm on the floor above
B
For a High-Rise building (greater than 75 ft): Establishment of 1892 lpm (500 gpm) from two handlines on the fire floor, and 946 lpm (250 gpm) on the floor above the fire.
According to the BFES Operations Manual, What is the primary tactic recommended for advancing the hose line to the seat of the fire?
a. Exterior attack
b. Ventilation
c. Interior attack
d. Backup line deployment
C
If a firefighter can efficiently advance the hose line to the seat of the fire by going interior that should be the primary tactic chosen. This will give firefighters the greatest chance of finding victims that may have been exiting the structure or are possibly still close to the origin of the fire. This tactic also provides the quickest means of extinguishment
According to the BFES Operations Manual, When flames are visible from the exterior, what may be the quickest way to cool the space?
a. Straight Stream Exterior attack
b. Ventilation
c. Interior attack
d. Backup line deployment
A
If flames are visible from the exterior and advancing the line to the interior may be delayed, a straight stream directed into the opening may be the quickest way to cool the space. The straight stream must be directed at a steep enough angle to hit the ceiling. This will make conditions better on the interior
According to the BFES Operations Manual, What is the working length of hose defined as?
a. 25 feet
b. 50 feet
c. 75 feet
d. 100 feet
B
To make an efficient advancement a ‘working length’ of hose shall be deployed to the appropriate entrance of the structure. A working length of hose is classified as a nozzle and a coupling at the entrance or 50 feet of hose unimpeded by friction points.
According to the BFES Operations Manual, Why is it important for a straight stream to be directed into the opening at a steep angle?
a. To block the exhaust
b. To entrain more air
c. To entrain less air
d. To increase visibility
C
The straight stream must be directed at a steep enough angle to hit the ceiling. This will make conditions better on the interior. It is important to note that this tactic must be as straight of a pattern as possible to entrain the least amount of air and the hose stream shall not be moved in any type of motion as to entrain air.
According to the BFES Operations Manual, When is a backup line meant to be stretched at every fire?
a. Only for high-rise buildings
b. When an exposure is present
c. Every Fire
d. As a backup for ventilation
C
Distinguishing and communicating for a second line for fire attack or a backup line should be precise. A backup line will be stretched at every fire. A backup line is in co-ordination with the initial line.
According to the BFES Operations Manual, What is the purpose of the backup line in coordination with the initial line?
a. Protecting egress of the initial fire attack crew
b. Directing water at the ceiling
c. Blocking the exhaust
d. Assisting in patient removal
A
This line is meant to protect the egress of the initial fire attack crew. Protecting interior stairs with the backup line is a critical consideration for below grade fires, and remaining in the vicinity of the interior stairs can assist in protecting them in situations where crews are advancing above the fire
According to the BFES Operations Manual, How long should the backup line be compared to the initial line?
a. The same length
b. At least one length longer
c. Half the length
d. Twice the length
B
The backup line shall be at least one length longer than the initial line. It will be at least the same size and flow rate, or larger than the initial line (to pass the original nozzle if need be or aid in extinguishing the fire). This line may become a second attack line if the initial line cannot extinguish the fire or is stretched short of the seat of the fire.
According to the BFES Operations Manual, In what situation may the backup line become a second attack line?
a. When flames are not visible
b. If the initial line cannot extinguish the fire
c. Only in high-rise buildings
d. The initial line was stretched short
e. B and D
B
The backup line shall be at least one length longer than the initial line. It will be at least the same size and flow rate, or larger than the initial line (to pass the original nozzle if need be or aid in extinguishing the fire). This line may become a second attack line if the initial line cannot extinguish the fire or is stretched short of the seat of the fire.
According to the BFES Operations Manual, What does calling for a second attack line mean according to the guidance note?
a. A request for ventilation support
b. A request for backup line deployment
c. A request for exposure protection
d. A request for fire attack support
D
Calling for a second attack line is meant for fire attack. If there is an exposure, the second hose line shall be committed there. If the second attack line is needed to support the fire attack of the initial line, it should be deployed appropriately.
According to the BFES Operations Manual, In what situations can the backup line crew assist the initial hoseline crew?
a. Only in high-rise buildings
b. Searching the area of origin
c. Patient removal
d. Both b and c
D
The backup line crew may assist the initial hoseline crew in searching the area of origin, patient removal, or fire attack based on the needs dictated by incident conditions
According to the BFES Operations Manual, When is the second hose line committed if there is an exposure?
a. Always
b. Only when the initial line cannot extinguish the fire
c. Only in high-rise buildings
d. Only when there are visible flames from the exterior
A
. If there is an exposure, the second hose line shall be committed there
