Chapter 17: Positioning Aerial Apparatus Flashcards
Apparatus placement procedures should be developed during __________.
Pre incident planning
During preincident planning for target hazards (high rise, hospitals), personnel should give special consideration to aerial apparatus in terms of _______ to various portions of the occupancy, overhead obstructions, and many other factors that may influence the function of the apparatus.
Access
Went 2 aerials respond to a given location, the first arriving aerial takes the ________ of building, and the second goes to the ________, depending on building access.
Front
Rear or side
Went 2 aerials’s response to a given location, the first aerial’s position is based on the __________, the second aerial apparatus ________.
Present conditions
Stages
__________: The area beneath a wall in which the wall is likely to land if it loses structural integrity.
Collapse zone
The proper distance between the objective and the aerial apparatus is the distance that affords _______, _______, and _________.
Maximum stability
Best climbing angle
Adequate extension
___________ place the maximum amount of stress on an aerial device and reduce its load-carrying capacity.
Long extensions at low angles
The ________ of the fire building affects the distance that the aerial device may be positioned from the building.
Conditions
_________: (1) positioning the apparatus in a location that provides the utmost efficiency for operating on the fire ground. (2) positioning a ladder to reach an object or person.
Spotting
Only as a last alternative should apparatus be placed on _____ surfaces.
Soft
_________: The ground above underground parking structures, utility chases, drainage culverts, basements that extend under sidewalks, or underground transportation systems.
Vaulted surfaces
_________ are good indicators of underground voids.
Manholes
_________ may tend to weaken marginal or otherwise firm paved surfaces.
Extreme heat
One visual indicator of a compromised asphalt surface due to extreme heat is when the asphalt ______, creating a shiny, glass-like surface.
Bleeds
When dealing with grade, position the apparatus with the front tires of the apparatus _________. With the rear tires off the ground, the truck has less resistance to slide downhill. the rear compartments will be more difficult to reach once the apparatus is leveled.
Uphill
_________: loads that involve motion. They include the forces arising from wind, moving vehicles, earthquakes, vibrations, or falling objects, as well as the addition of a moving load force to an aerial device or structure.
Dynamic load
Electricity will arc across a gap as large as ______ feet, and all overhead obstruction wires or cables should be considered hazardous and dangerous
10
Provide _____ feet of clearance between the aerial device and overhead high-voltage lines.
10
Provide ______ feet of clearance for high-voltage transmission lines over 50,000 volts.
50
The apparatus is MOST stable when the aerial device is operated directly over the _________ of the vehicle
Front or rear
An angle ________ to the apparatus is the least stable position.
Perpendicular
For rear-mounted aerial devices, ________ the apparatus is the preferred method, as this maximize the reach to the aerial device.
Backing in
_________ involves turning the tractor has an angle from the trailer.
Jackknifing
Greatest ability occurs when jackknifing is approximately _______ degrees from in-line and the aerial device is extended ______ from this angle.
60
Away
__________ are factors that work against the aerial device’s strength.
Stresses
Stress tends to be greater when the aerial device is __________.
In motion
Stress in aerial devices is increased when the ladder rungs are operated _________ to the ground or when the apparatus is parked on an incline and the aerial device must operate off of the_______ of the apparatus.
Nonparallel
Side
When an apparatus must operate off an incline, reduce the stresses by spotting the turntable _______ from the point of operation.
Downhill
If the truck only has two jacks, then the direction/grade in which it can be stabilized on is fairly limited. The apparatus needs to be facing _______
Uphill
The maximum loading for any unsupported aerial device occurs when operated at angles between ______ degrees from horizontal.
70-80
When positioning on highways, close at least ______ lane next to the incident. Consider parking additional apparatus ______ feet behind the shielding apparatus.
1
150-200
When operating on bridges and multiple apparatuses are responding, do not park or operate all apparatus on the same ______.
Span
On emergency medical incidents, if it is not possible to locate off the street, the driver should position the apparatus to _________.
Shield firefighters from traffic
On structural incidents, ________ must be constantly monitored during operations.
Building stability
On aircraft incidents, the aerial device will be primarily used to _______
Transport firefighters/equipment to upper levels
On aircraft incidents, the aerial device may be used to provide access for the following: (4)
Ventilation
Passenger rescue
Deploying headlines to the interior of the aircraft
Master stream applications
When operating at storage tank fires, the apparatus should never be spotted ________ that surrounds the affected tanks.
Inside the dike
Aerial apparatus placement on the fire ground is critically important because aerial devices and ladders have a __________.
Fixed maximum length
