Ch 7 Controlling Utilities

Question 1

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

Answer 1

Utilities

Question 2

Many of the utility related calamities in which firefighters have been injured or killed or caused by fueled by _______,________ or ________

Answer 2

Natural gas, LPG, heating oil

Question 3

The most common fuel control problem that truck company personnel face is making sure that the_______ supply to a burning building is secured

Answer 3

Gas

Question 4

Stopping the flow of_______ into a burning building is one of the most common gas control operations that firefighters perform

Answer 4

Natural gas

Question 5

When any LPG tank regardless of size is involved in fire, the possibility of a _______is ever present

Answer 5

Boiling liquid expanding vapor explosion

Question 6

Evacuations should be made at least_____ away from any LPG tank that has the potential for BLEVE

Answer 6

1/2 mile

Question 7

________is sometimes stored in underground tanks that are connected to the heating appliance by copper or aluminum tubing

Answer 7

Heating oil

Question 8

Heating oil tanks are mounted on________ above ground to increase gravity pressure

Answer 8

Stanchions

Question 9

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

Answer 9

600, 1000

Question 10

Perhaps the most dangerous phenomenon associated with oil fired appliances his come only called a__________

Answer 10

White ghost

Question 11

Because the responding fire apparatus could provide a source of ignition, the approach to the area of a reported odor should be from_________

Answer 11

Upwind

Question 12

The DOT ERG 2008 recommends staging anywhere from_____ to _____ feet from the source of both LPG and natural gas leaks

Answer 12

160, 330

Question 13

One of the first arriving units should be assigned to establish a perimeter or _____ around the hazard area and maintain control of that perimeter

Answer 13

Control zone

Question 14

_________. 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

Answer 14

Control zone

Question 15

When monitoring for LPG, readings should be taken close to the_______

Answer 15

Ground

Question 16

Because natural gas is slightly lighter than air, the readings should not be taken near the _______

Answer 16

Ground

Question 17

When sufficient humidity is present, an _______ leak may form a white cloud in air

Answer 17

LPG

Question 18

For truck company personnel, the two most common emergency situations involving electricity are__________ and________

Answer 18

Structure fires, downed electrical wires

Question 19

In many structure fires, one of the most important safety considerations is shutting down______ service to the burning building

Answer 19

Electrical

Question 20

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

Answer 20

Weatherhead

Question 21

Even though banned by the US environmental protection agency for many years, the oil in some older transformers may contain _____, which are known carcinogens

Answer 21

Polychlorinated biphenyls

Question 22

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

Answer 22

One full , poles or towers

Question 23

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 ________

Answer 23

Alternating current detectors, thermal imaging cameras

Question 24

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

Answer 24

240 volts

Question 25

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

Answer 25

Live load

Question 26

On most small residential buildings, a single_______ in the mainline between the water meter and the building controls the water supply

Answer 26

Gate valve

Question 27

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

Answer 27

T-handle

Question 28

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

Answer 28

Thermocouple

Question 29

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

Answer 29

Re-energize

Question 30

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

Answer 30

Upwind

Question 31

The two most common gas control situations that firefighters face are those in ________ in those in which there is a ______

Answer 31

Structure fires, gas leak without fire

Question 32

In any industrial properties, gas meters are located in _______ or and ______ inside the buildings

Answer 32

Underground faults, utility rooms

Question 33

On portable LPG tanks, the control valve is located on the ______, sometimes protected by hinged weatherproof cover

Answer 33

Top of the tank

Question 34

Where multiple tanks are installed side-by-side, the flow from any or all of the tanks may be controlled from a _______location

Answer 34

Central manifold

Question 35

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

Answer 35

Below, downwind

Question 36

Some industrial boilers are fired with ______and a variety of other similar fuels

Answer 36

Pulverized Coal

Question 37

As a combustible liquid, _____ must be preheated before it will burn

Answer 37

Heating oil

Question 38

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 _______

Answer 38

Electricity, steam

Question 39

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

Answer 39

Gate valve

Question 40

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

Answer 40

Crimping the tubing

Question 41

A _______ has a strong odor of fuel oil and is within its explosive range

Answer 41

White ghost

Question 42

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

Answer 42

Block away and Upwind

Question 43

In most cases involving downed electrical wires, firefighters should do nothing more than _______ to all except utility company personnel

Answer 43

Establish a perimeter and deny entry

Question 44

When power from the normal utility source fails, some ______ may start automatically

Answer 44

Emergency generators

Question 45

______ 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

Answer 45

Resistance

Question 46

The two most common situations relating to water control by truck company personnel are in _______ and in buildings with major ______

Answer 46

Structure fires, water leaks without fire

Question 47

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

Answer 47

OS&Y valve

Question 48

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

Answer 48

Sub surface valve