Utility Emergencies Flashcards
If any doubt concerning your ability to manage a incident involving gases or leaks request
HAZMAT Unit
Methane has a vapor density of __ making it _____ than air
.55. Lighter
A note of caution is that natural gas in transmission pipelines and rail cars is _____ odorized, with ______
Not, Mercaptan
The flammable range for methane is _ % to __%
5% to 15%
ignition temperature for natural gas is about ______
1200 degreees
Markers show the pipeline’s approximate location
Not its exact location
When shutting off the gas at the appliance, the shut off valve will be a quarter turn,
just prior to the regulator and appliance
outside gas leaks and other outside gas emergencies, engine companies shall position the apparatus
prior to and upwind
general rule for apparatus positioning is no closer than ___
For the first arriving unit and a minimum distance of __
100 feet
300 feet
During gas emergencies the second engine should stage at ____ outside the hot zone
The hydrant
Gas line over ___inches in diametershould be upgraded to an HAZMAT event
2 inches
During a outside gas leak what is dispatched
1 engine
1 truck or rescue
Ensure who should be called enroute to a gas emergency
Gas Company
If gas is leaking prior to a shut off and no gas is entering any structure the best course of action is
No action
fire department personnel shall ensure no persons enter a trench deeper than ___ that is not shored
5 Feet
To protect the utility company workers, units should position upwind with a ______ and a _____
20 LB dry chemical
Charged hose line
All non-essential personnel, including firefighters and civilians, shall be kept out of the hot zone. The DOT Emergency Response Guide (ERG) suggests an evacuation distance ____
330 ft
Gas lines are buried around ___ below the surface
24”
Gas lines have a _____ _____ ____ over them for gas company can detect them.
Yellow coated wire
If a gas line is on fire the best procedure is to _____
Protect exposures
If a gas meter is on fire the best place to shut off is the ______
Curb valve
Consideration must be given to a potential ignition source being an auxiliary generator. If the power to a structure is shut off at the electric panel this action may cause the generator to operat
Secure the generator prior to operating the electric panel.
After a pipelines delivers gas to an occupancy, use of a regulator reduces the pressure of the gad between __ to ___ psi to between __ / __ psi before gas passes through the occupancy gas meter
40 and 200 psi
1/2 psi and 1/4
What are the two types of gas meters ____ and ____
Outside and inside
All inside or enclosed gas installations are required to have the regulator vented to the outside via piping and must be within _ of the vent on an inside wall
5 feet
When the gas meter is involved, and access to the meter shut off cannot be accessed, the best place to shut off the gas is at the
Curb
Propane has an expansion ratio of
270:1
Carbon Monoxide Emergencies dispatch
1 engine company
1 EMS unit
CO alarm
10-35
35-100
100 or greater
Inform occupants to have a technician check appliances
Ventilate structure and see if occupants need medical attention
Evacuate structure and full PPE and SCBA
Ground transformer
After power is removed it is recommended to extinguish any remaining fire with
dry chemical or CO2 extinguishers,
When attempting to control gas service to an occupancy firefighters may control gas at the _____ ____ valve
Curb box
Do not attempt to shut off gas in manholes or street box
A vent pipe indicates what?
Interior gas meter
Battalion 404 from E423, E424 is staged at the corner of Little River TPKE and Guinea Rd. We have a crew of 3 performing RECON, side Alpha of the Delta exposure. The structure a a is a 2 story SFD, nothing evident
Conduct lap
LEL operations
0-10%
10-25%
25% or greater
Investigate
Investigate with SCBA
Evacuate
When operating in an IDLH on a gas leak, member should use a ______ and ______ to protect personnel in the hot zone
Dry chemical extinguisher
Hose line
While investigating one fire fighter should remain by the engine and the other firefighter should bring _________ and AMD devices
Dry chemical extinguisher and AMD
When personnel determine that fire is gas-fed, who shall be notified
Command and request for utilities to shut down
First due engine on a inside or outside gas leak is to identify a hydrant ___ ft from incident address
300
Tactics
When a propane tank vents and product is burning personnel should ____ the tank
Cool
Electricity has tow basic properties
Voltage and current
Ground transformer fire
Once power has been removed personnel should consider using ______ or _______
Dry chem or CO2 extinguisher
If fire department turns off sprinkler system in a commercial building who must be notified
Fire inspection officer or fire Marshall office
A regulator reduces the pressure of the gas from between ___ and ____ psi between 1/2 and 1/4
40 and 200
Most commercial and all residential appliances use gas pressure of ___ and ___
1/2 and 1/4
During the size up, unit officers should complete _____ of the structure
360 lap
10-25% LEL
Continue to investigate utilizing an SCBA
When members working in the hot zone, what must be used for protection
Dry chemical extinguisher and hose line
If personnel encounter a smell of natural gas with no gas appliances personnel should check ____ for odors from HVAC units rooftop lines
Rooftop
When personal determine that a structure fire is gas fed…who shall be notified ______and what should shall be regulated
Command
Shut down a gas line
Propane tank,
Person should ____ the tank
Cool
CO alarm
Personnel should refrain from ______
Ventilation
Occupancy should be evaluated if CO reading reach above
100 PPm
If fire department turn off sprinkler system in a commercial building, who shall be notified
Fire inspection department or fire marshal office
FYI: the occupancy may need to have a fire watch until system can be restored
Where is the safest place for the fire department to lock out power.
Electrical panel
If firefighters have to access interstitial space in a structure who shall be contacted ______ _____
Building engineer
If a ground transformer is on fire, fire department personnel shall wait until power is shut off by utility company and remaining fire should be extinguished with ______ or ______
CO2 or Dry chem
