Chapter 4 - Extrication Equipment Flashcards
Rescue personnel typically used either of three types of breathing equipment:
Self-contained Breathing Apparatus (SCBA)
Supplied Air Respirator (SAR)
Air-Purifying Respirator (APRs)
SAR
Air is supplied to the users by high-pressure hoses up to ___ long from a bank of larger air supply cylinders or an air compressor.
300 ft
___ contain an air-purifying filter, canister, or cartridge that removed specific contaminants found in ambient air as the air passes through the air-purifying element.
APRs
What are the 3 types of APRs
Particulate Removing
Vapor-and-Gas Removing
Combination particulate-removing and vapor-and-gas removing
_____ may be powered or nonpowered.
APRs
_____ do not supply oxygen or air from a separate source, and they protect only against specific contaminants at or below certain concentrations.
APRs
_____ should be worn only in controlled atmospheres where the hazards are completely understood and at least ___ % oxygen is present.
APRs
19.5
The three primary limitations of an APR are as follows:
> Limited life of its filters and conisters
Need for constant monitoring of the contaminated atmosphere
Need for a normal oxygen content of the atmosphere before use
Take the following precautions before using APRs or PAPRs
> Know what chemicals/air contaminates are in the air
Know how much of the chemicals/air contaminates are in the air.
Ensure that the oxygen level is between 19.5 and 23.5%
Ensure that atmospheric hazards are not immediately dangerous to life and health (IDLH) conditions
The _______ is a circle around the winch with a radius equal to the length of cable or chainfrom the winch to the load.
Winch Danger Zone
A ______ prevents the drum from overrunning when the winch clutch is disengaged and the cable is being unwound.
Drum Brake
Three disadvantages to adding a crane to a heavy rescue unit are:
> The initial cost of the crane itself
The additional maintenance required
The loss of space for other tools because of the crane’s size
Three common air supply systems on rescue vehicles are:
> Cascade Systems
Breathing Air Compressors
Nonbreathing Air Compressors
_____ are step-up transformers that convert the vehicle’s 12- or 24- volt DC current into 110- or 220- Volt AC current.
Inverters
Also called alternators, _______ are fuel efficient and produce little or no noise during operation.
Inverters
Portable lights generally range from ____ to ___ watts.
300
1,000
Some dedicated lighting units have hydraulically operated booms with banks of lights with capacities ranging from ___ to ____ watts per light.
500
1,500
Overtaxing the power plant will ___, ___, and ___
> Provide poor lighting
May damage the power generating unit
will cause electric tools to not function as designed.
The most common size cable is ___, ___ type.
12-guage
3-wire
Electical cable must be ____, ____, and ____.
Adequately Insulated
Waterproof
Have no exposed wires
The most common size wood cribbing is ____.
4- x 4- inch wood timbers
The length of the pieces of wood cribbing may vary, but __ to __ is average.
18- to 24- inches
Other surfaces of the cribbing should be _______ because the finish can make the wood slippery, especially when wet.
Free of any paint or finish.
Plastic cribbing has the advantage of being ___, __, and ______.
Impervious to oil
gasoline
other substances that can soak into and contaminate wooden cribbing.
The most common application for cribbing in vehicle extrication is called a _____.
Box Crib