Chapter 8 Flashcards
___________ is defined as the unintended, and often sudden, release of stored, residual, or potential energy that will cause harm if contacted.
Hazardous Energy
The integrity of electrical systems is based on their being properly _______, __________ and ___________.
Grounded
Insulated
Circuit Protected
Electricity is always trying to seek the path of _________ to ground.
least resistance
Firefighters attempting to approach compromised electrical equipment may feel a tingling sensation in their feet; this is a danger sign known as _____________.
ground gradient
Treat all downed power lines as ___________.
energized
Keep a safe distance from downed power lines - at least ________.
10 feet
Electrical transmission and distribution substations use large ______ to step down voltage.
transformer
High-tension wires that separate from anchor points can “________” with tremendous force; that is, when the tension is released suddenly, the wire snaps, or whips, in a direction opposite to the tension force.
reel coil
Individual turbine blades can be _________ long, creating a rotational diameter and danger zone of more than _______.
60 - 130 ft.
300 ft.
The tips of a 60 foot long blade are actually traveling at more than ________.
70 mph
Older, internally located transformers may still contain ___________ - a very toxic carcinogen
Poly-Chlorinated Biphenyls
_______ runs are typically located behind interior wall, floor and ceiling coverings.
Romex
________ systems can include backup generators, battery banks, or alternative power supplies, such as solar systems.
UPS
… These batteries are typically on a slow charging system, creating ________ as a by-product.
hydrogen gas
Solar energy is used in two ways:
Electrical generation
thermal heating
Solar electrical generation system,s include an array of ______ panels that collect light energy from the sun to stimulate electrons in a silicon crystal or film.
photovoltaic
PV systems include an additional roof dead load of _____ per square foot.
3 - 5 pounds
A standard 3-foot by 40foot PV panel weighs approximately ______ pounds.
40
Solar thermal panels can be distinguished from PV panels by the ______ that is connected to the panel.
piping
Solar heating systems have an additional roof dead load of _____ per square foot.
5 - 8 pounds
The most important utility to control is _______>
gas
The most common utility gases are ______ and _________.
propane
natural gas (methane)
Pressurized systems use either _______ (liquids) or _________ (air/gases) as a medium to achieve power or force.
hydraulics
pneumatics
Bright orange conduit or cable can indicate high-voltage power (up to _____ volts and _____ amps) is used in the drivetrain of a vehicle
700
125
_________ conduits or cables can indicate medium-voltage drivetrains (less than high-voltage systems but more than typical 12 or 24-volt systems)
Bright Blue
CNG labels are standardized as a ____ diamond with the words “CNG”, “LNG” within the diamond.
blue
Propane-powered vehicles should have a _______ diamond with “Propane” or “LPG” within.
Black
Of all the weather considerations affecting firefighting operations, _____ is by far the most important.
wind
Wind is created as air masses attempt to reach ___________.
equilibrium
A falling _______ can indicate an approaching storm and subsequent wind.
barometer
Lower _______ means increased fire spread.
humidity
In especially dry environments, firefighters become ________ quickly from breathing as well as sweating.
dehydrated
This is the area where no responders are allowed to enter, regardless of PPE, due to dangerous conditions.
no-entry zone
This area immediately surround a hazardous area and can be considered an IDLH environment requiring appropriate PPE.
hot zone
This area surrounds a hot zone and is where personnel, equipment, and apparatus are operating in support of an operation.
warm zone
This area surrounding the warm zone is used for an incident command post, support-agency interfacing, and staging of personnel and equipment.
cold zone
Decontamination processes and RIT stand are typically found in the ________.
warm zone
It is best to be conservative and add at least _____% to the collapse height.
50
PUVCE acronym
Percussive Unconfined Vapor Cloud Explosion
_______ safeguards ensure that electricity remains off and valves, switches, and other initiating devices remain in an off or closed position.
Lock-Out/Tag-Out
