Ch8 Flashcards
Defined as the unintended, and often sudden, release of stored, residual, or potential energy that will cause harm if contacted
Hazardous energy
The unit of measure for volume of current flow
Ampere(amps)
The completeness of a current circuit; the ability of electricity to pass unbroken from one point to the next
Continuity
The measure of the ability of a material to pass electrical current
Conductivity
The presence of electrical current within a material or component
Energized
The position or portion of an electrical circuit that is at zero potential with respect to earth. The point of electrical return for an electrical circuit
Ground
A device that will break continuity in a circuit when grounding occurs before the current returned to the distribution source
Ground fault interruption GFI
Or event of creating a point for electrical current to return to zero potential
Grounding
The unit of measure for resistance of electrical current.
Ohm
The degree that a material holds or impedes the flow of electrical current
Resistance
The release of electrical energy that has accumulated on and insulated body. Static is a stationary charge looking for a ground
Static discharge
The force that causes the flow of electricity
Voltage/bolt
The unit of measure for electrical force or potential
Volt
A unit of measure for the amount of energy a specific appliance uses
Watt
Tell-tale signs of electrical problems, shock potential:
Tingling or static sensations around the face or hands which indicate__potential for___through air.
Arcing
Static discharge
Tell-tale signs of electrical problems, shock potential:
Tingling sensations and feet, which indicate____and_____
Ground gradient
And
Step potential
Keep a safe distance from down powerlines, at least?
10feet
Incident operations involving electrical grid equipment are numerous and specialized tactics should not be attempted without consultation with the?
Electrical power authority
Wind turbine:
Individual blades can be__to__feet long, creating a rotational diameter and danger zone of more than 300 feet
60-130ft
Wind turbine:
The tips of a 60 foot long later actually traveling more than?
70 mph
Fire in a large wind turbine is best watched from the perimeter of a substantial collapse zone. True or false?
True
Knob and tube wiring may be found in buildings built before?
1930
Emergency responders working in or around UPS rooms need to exercise extreme caution because of the presence of____power created by the batteries
Direct current DC
There is typically no ground fault protection with Direct current power. True or false?
True.
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Solar energy is used primarily in two ways:
Electrical generation and thermal heating
What’s the roof dead load for photovoltaic panels?
3-5lbs per square ft
What’s the roof dead load for solar thermal panels?
5-8 lbs per square ft
Firefighters who have seen a propane tank BLEVE undoubtedly agree that the most important utility to control is?
Gas
Close containers of various products may become_____when heated by fire or hot smoke
“Pressure vessels”
Failure of the container can cause the container to become?
An unguided missile
Bright orange conduit or cable can indicate that high-voltage power up to__volts and__amps is used in the drivetrain of a vehicle
700 volts
125 amps
Bright blue conduits or cables can indicate ____________drivetrains, less than high-voltage systems but more than typical 12 or 24 V systems
Medium voltage
___Is a dynamic, complex, and often misunderstood force that fire fighters must contend with
Weather
Of all the weather considerations affecting firefighting operations,___is by far the most important
Wind
Prevailing wind
Jet stream
The diurnal wind
Day/night effect
Very light, sail shaped cloud formations found high aloft
Lenticular clouds
Latin for rain cloud
Cumulonimbus
Humidity:
Lower humidity means ?
Increased fire spread
From the isos perspective, temperature needs to be evaluated relative to its effect on FF exposure. ________ is critical.
Acclimation
Often forgotten in the list of hazardous energy forms are ?
Animals and medical facilities
This is an area where no first responders are allowed to enter, regardless of PPE. Some call this an “exclusionary zone”
No entry zone
This area immediately surrounds a hazardous area and can be considered an immediately dangerous to life and health IDLH environment requiring appropriate PPE l, accountability procedures, and a STANDBY RIC
Hot zone
This area is used for incident command post, support agency interfacing, and staging of personnel and equipment.
Cold zone
*PPE is dearest needed in the cold zone
This zone is where personnel, equipment, and apparatus are operating in support of an operation. Decontamination processes and RIC standby are TYPICALLY FOUND IN THIS AREA
Warm zone
- surrounds the hot zone
Defining the different control zones addresses the severity component of ?
Avoidance
Define PUVCE “poov-see”
Percussive unconfined vapor cloud explosion
Judgement regarding control zone distance:
The height of something that may collapse. It is best to be conservative and add at least ?
50% to the collapse height
Judgement regarding control zone distance:
The length of cable or wire and the direction of recoil when it releases. Add ______.
25%
Define LOTO
Lock out/tag-out
______safeguards ensures that electricity remains off and valves, switches, and other initiating devices remain in an off or closed position.
LOTO
LOCKOUT TAGOUT
A diligent ISO will also ensure that any local isolation switches are also turned off.
The LOTO procedure may take place hundreds of feet away, but the actual machinery/entrapment will have an isolation switch(stop button) within arms length.
True or false?
True.
_______hazards are the greatest threat from electricity
Shock
The primary method for reducing electrical shock threats is to ?
Shut off the electricity where possible
Winds above _______mph can cause extreme fire behavior according to the latest studies
10-20mph
P121
What color tape for the hot zone?
Red
What color tape for the no entry zone?
Red/white diagonal stripe
What color tape for the warm zone?
Yellow
What color tape for the cold zone?
Green tape
