Chapter 11: Commercial/ Heavy Vehicle Disentanglement Flashcards Preview

Principles of Vehicle Extrication > Chapter 11: Commercial/ Heavy Vehicle Disentanglement > Flashcards

Flashcards in Chapter 11: Commercial/ Heavy Vehicle Disentanglement Deck (22)
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When accessing and egressing vehicles, personnel should watch out for sharp objects such as broken glass or jagged metals. These items should be ____.

identified, covered, and/or removed from the vehicle.


To build a platform for access to large vehicle, rescuers should first ____. Resources such as _____ are then used to ____ and create a solid work platform.

* build two boxes 4 to 6 feet aport and up to the height required to access the vehicle.
* long timbers, ladders, or backboards then bridge the two crib boxes


If operating the exterior or interior door handle does not open a door, it sometimes helps to ____

operate both handles simultaneously


Heavy truck doors usually ____ collision beams

do not contain


Side and rear windows on medium and heavy trucks are typically ____

tempered glass


On trucks with air ride seats, rescuers should ____ prior to attempting displacement.

release the air from the seat


Rescuers should consider gaining access through the floor of a bus ____

as a last resort.


Rescuers can often quickly create an avenue of access to the center pivot arm control and operate the door in the normal manner in one of the following ways:

* Remove the windshield so that a rescuer can reach through the opening and manually operate the control
* Reach in through the drivers side window with a pike pole to operate the control.


To force center opening bus doors rescuers should:

Insert a spreader between the two overlapping seals about halfway up the door and force each half to its respective side.


To remove a bus windshield, rescuers should ____

cut and remove the rubber mounting gasket.


Many buses have a small access hatch that rescuers can reach through to open a window from the inside. This hatch is usually ____. On commercial busses, it is ____

* level with the bottom of the last window on the passenger side of the bus.
* located directly outside the restroom.


Prior to performing any cutting operations to create openings through the side wall of a bus, rescuers should ____

use the horizontal coping on the exterior sidewall as a guide to identify the seat and floor levels on the bus.


The heaviest beams in bus construction are located ____

on the floor, where the seats bolt to the wall, and above and below the window.


Rescuers should remove ____ before opening a sidewall of a bus.

the seats


The best tool to cut through the structural components in the sidewall of a bus is __

a reciprocating saw with a 6-inch metal cutting blade will produce a smooth cut through all layers of material at one time, and with little chance of igniting any flammable vapors in the air.


Pneumatic Chisel tool designed to operate at air pressures between ____ and ____ psi; during periods or normal consumption, it will use about ____ to ____ cubic feet of air per minute. It's useful for extrication work.

* 100 and 150
* 4 to 5 cubic feet


When enlarging the opening created by the rear exit door of a bus rescuers where should the cuts begin?

At natural openings such as windows or doors.


Bus floors consist of:

a heavy frame to support the entire bus, plus sheet metal, plywood, a vinyl or rubber floor covering, and beams and other framework as close as 9 inches apart.


Rescuers will likely only attempt through the floor access on side resting or roof resting buses, what dangers are unique to this operation.

the fuel tank, which is mounted under the vehicle, will be inverted and probably leaking fuel near the cutting area. This makes the risk of a flash fire high.


When a bus driver is trapped by the steering wheel, what options do rescuers have for extrication?

* Pneumatically operated seats may have the air controls operated releasing air and freeing the driver.
* Cutting the steering wheel spokes or ring (the quickest method of freeing the victim is to cut the wheel with the cutters)
* Unbolt the seat from the floor (partition behind the driver may need to be moved)
* Tilt the steering wheel away from the victim
* Rescuers may want to pull the steering column up and away from the driver like in passenger vehicle extrication. This is not recommended due to the tilting steering wheel that can break sending the steering column pivoting into his or her torso.


When removing bus seats by cutting, rescuers should ____

cut the legs as close to the floor as possible and tape or cover the sharp stubs with duct tape.


The rescue device best suited to lift a bus off a victim is ____

a pneumatic lifting bag