Ch 7 Controlling Utilities Flashcards
At working structure fires, securing a burning buildings ______ is one of the best ways in which to protect firefighters and Occupants who may be trapped inside
Utilities
Many of the utility related calamities in which firefighters have been injured or killed or caused by fueled by _______,________ or ________
Natural gas, LPG, heating oil
The most common fuel control problem that truck company personnel face is making sure that the_______ supply to a burning building is secured
Gas
Stopping the flow of_______ into a burning building is one of the most common gas control operations that firefighters perform
Natural gas
When any LPG tank regardless of size is involved in fire, the possibility of a _______is ever present
Boiling liquid expanding vapor explosion
Evacuations should be made at least_____ away from any LPG tank that has the potential for BLEVE
1/2 mile
________is sometimes stored in underground tanks that are connected to the heating appliance by copper or aluminum tubing
Heating oil
Heating oil tanks are mounted on________ above ground to increase gravity pressure
Stanchions
Some industrial heaters or boilers use steam or air atomizers, but much residential units use mechanical atomizers. Considering that the oil pressure required for maximum efficiency ranges from ______to________psi
600, 1000
Perhaps the most dangerous phenomenon associated with oil fired appliances his come only called a__________
White ghost
Because the responding fire apparatus could provide a source of ignition, the approach to the area of a reported odor should be from_________
Upwind
The DOT ERG 2008 recommends staging anywhere from_____ to _____ feet from the source of both LPG and natural gas leaks
160, 330
One of the first arriving units should be assigned to establish a perimeter or _____ around the hazard area and maintain control of that perimeter
Control zone
_________. System of barriers surrounding designated areas at emergency scenes intended to limit the number of persons exposed to the hazard in to facilitate it’s mitigation
Control zone
When monitoring for LPG, readings should be taken close to the_______
Ground
Because natural gas is slightly lighter than air, the readings should not be taken near the _______
Ground
When sufficient humidity is present, an _______ leak may form a white cloud in air
LPG
For truck company personnel, the two most common emergency situations involving electricity are__________ and________
Structure fires, downed electrical wires
In many structure fires, one of the most important safety considerations is shutting down______ service to the burning building
Electrical
Where power is distributed to the neighborhood through overhead wires from the power grid, the buildings main electrical panel is usually located directly below the ______ where power from a pole mounted transformer enters the building
Weatherhead
Even though banned by the US environmental protection agency for many years, the oil in some older transformers may contain _____, which are known carcinogens
Polychlorinated biphenyls
A common error is to establish a perimeter that is too small. The recommended isolation distance is the equal to ______ span between the adjacent ____________ in all directions from a break in a wire or the point of contact with the ground
One full , poles or towers
If a downed wire is obscured by building debris, smoke, or darkness, firefighters may need to use various forms of technology to identify the hazard area. Two of the most useful devices available to fire departments are________ and ________
Alternating current detectors, thermal imaging cameras
When power from the normal utility source fails, some emergency generators may start automatically. If these units are not disconnected from the system, the powerlines can be re-energized with ______from the generators
240 volts
Allowing sprinklers to continue discharging water after the fire has been controlled also adds to the______ of the building and may Unnecessarily increase property damage
Live load
On most small residential buildings, a single_______ in the mainline between the water meter and the building controls the water supply
Gate valve
In an even larger buildings and complexes, the water supply is controlled by a large sub surface valve in the street adjacent to the front of the property. A large ______ water key may be needed to operate this Valve
T-handle
Water collecting in a seldom use basement or cellar can short out the buildings electrical system and or extinguish the pilot lights in gas fired furnaces and water heaters. If these gas powered units are old enough, they may not have the _______ controlled gas shut off valves found on newer units
Thermocouple
Because power outages often results from very temporary causes, such as a tree limb being blown against a wire by Highwind, most electrical distribution systems are programmed to automatically _________ a few seconds after the circuit breaker in the substation trips
Re-energize
If the call is reported gas leak without fire, the universal priorities dictate that the responding units approach the scene from _____and stage a safe distance away
Upwind
The two most common gas control situations that firefighters face are those in ________ in those in which there is a ______
Structure fires, gas leak without fire
In any industrial properties, gas meters are located in _______ or and ______ inside the buildings
Underground faults, utility rooms
On portable LPG tanks, the control valve is located on the ______, sometimes protected by hinged weatherproof cover
Top of the tank
Where multiple tanks are installed side-by-side, the flow from any or all of the tanks may be controlled from a _______location
Central manifold
Because LPG is heavier than air, leaking gas will tend to stay close to the ground and collect in depressions, basements, underground vaults and or other low areas. Therefore, if there is an LPG leak without fire, firefighters should eliminate sources of ignition located ______ and ______from the leak source
Below, downwind
Some industrial boilers are fired with ______and a variety of other similar fuels
Pulverized Coal
As a combustible liquid, _____ must be preheated before it will burn
Heating oil
As a combustible liquid, heating oil must be preheated before it will burn. The preheating process may increase the risk to firefighters because this is usually done with either ______or _______
Electricity, steam
If a fuel oil tank is not threatened by or involved in fire, The flow of oil can be stopped at the tank by closing the ______where the tubing connects to the tank
Gate valve
If a fuel oil tank is not threatened by or involved in fire, the flow of oil can be stopped at the tank by closing the gate valve where the tubing connects to the tank. If the valve is in operable for any reason, _______ can stop the flow of oil
Crimping the tubing
A _______ has a strong odor of fuel oil and is within its explosive range
White ghost
Depending upon the size and location of the leak, wind speed and direction, toography, and local SOPs, apparatus should be staged as much as a ______ from the leak
Block away and Upwind
In most cases involving downed electrical wires, firefighters should do nothing more than _______ to all except utility company personnel
Establish a perimeter and deny entry
When power from the normal utility source fails, some ______ may start automatically
Emergency generators
______ occurs when an uninsulated conductor is in contact with the ground or there is a kink in or damage to a conductor, insulated or not
Resistance
The two most common situations relating to water control by truck company personnel are in _______ and in buildings with major ______
Structure fires, water leaks without fire
Unlike the commercial systems, the valve controlling the water supply to residential sprinklers may either be a small ______ or the same type of gate valve as is used to control the domestic water supply
OS&Y valve
On larger multiple residential and other buildings, the water supply is controlled by a _____ often found in the sidewalk between the Water main and the building
Sub surface valve
