CHAPTER 10 - SCENE LIGHTING Flashcards
Portable device for generating auxiliary electrical power.
Generator
Mechanism that allows a vehicle engine to power equipment such as a pump, winch, or portable tool; it is typically attached to the transmission
Power take off system
Step up transformer that converts a vehicles 12 or 24 volt dc current into 110 or 220 volt av current
Inverter
Describes equipment that is approved for use in flammable atmospheres.
Intrinsically safe
Device designed to protect against electrical shock.
Ground fault circuit interrupter
Electrical generators are the most common power source used by emergency services personnel. True or false?
True
Vehicle mounted generators produce less power than portable units. True or false?
False - they produce more power
Lighting equipment can be divided into three categories. True or false?
False - two: portable and fixed
Fixed lights are used to provide overall lighting of the emergency scene. True or false?
True
All auxiliary electrical equipment must be waterproof, intrinsically safe, and designed for the amount of electrical current it is intended to carry. True or false?
True
Junction boxes provide a connection supplied through multiple inlets from a power source. True or false?
False - they supply multiple outlets from one power source
Vehicle mounted generators produce more power than portable units. True or false?
True
Fixed lights are used to light remote areas of the incident scene. True or false?
False
Only junction boxes and adapters are required to be waterproof; other auxiliary electrical equipment may not need to be. True or false?
False
What is the most common source of power used by emergency services personnel?
Electrical generators
Incident in which trapped victim must be removed from a vehicle or other type of machinery
Extraction
High temp luminous electric discharge across a gap or through a medium such as charred insulation.
Arc
Preventing unwanted movement; accomplished by supporting key places between an object and the ground
Stabilization
Block placed against the outer curve of a tire to prevent the apparatus from rolling; can be wooden, plastic, or metal.
Wheel chock
Wooden or plastic blocks used to stabilize a vehicle extraction or debris following a structural collapse
Cribbing
Device that takes up slack in a seatbelt; prevents the passenger from being thrown forward in the event of a crash.
Pre-tensioner
Post between the front and rear doors on a four-door vehicle, or the door handle end post on a two door car
B post
Two sheets of glass laminated to a sheet of plastic sandwiched between them; the plastic layers make the glass stronger and more shatter resistant
Safety glass
Treated glass that is stronger then plate glass or a single sheet of laminated glass; safer than regular glass because it crumbles into chunks when broken
Tempered glass
Bolt in a vehicle’s door frame that the door latches onto in order to close
Nader pin
Method of automobile construction in which the frame and the body form one integral unit; used in most modern cars
Unibody construction
Steel used in vehicle construction whose exterior has been heat treated,making it harder than the interior metal
Case hardened steel
Collapse that occurs after the initial collapse of a structure; common causes include aftershock, weather conditions, and the movement of structural members
Secondary collapse
Abnormally low body temperature
Hypothermia
Wall like concrete structure across a river or stream that is designed to back up water; allows water to flow over the crest and drop into a lower level
Low head dam
Device used to secure a machines power switches in order to prevent accidental restart of the machine
Lock out/tag out device
Electrical field that radiates outward from where the current enters the ground; it’s intensity dissipates rapidly as the distance increases from the point of entry
Ground gradient