Bk 99 - Brush Fire Operations Flashcards

1
Q

Brush ICS Chart:

A
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2
Q

Map Display Symbols:

A
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3
Q

For large scale incidents (Brush), the “_____” card system is a dynamic manual system used to maintain resources status by assignment and location at an incident.

A

T-Card

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4
Q

ICS Resource Tacking “T-Card” Color Coding:

Engines are the color _______

Strike Teams/Tactical Teams are the color ______

A

Engines: Rose

ST/TT: Tan (Blacked out corner on T card indicates ST or TT)

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5
Q

Brush ICS Division and Group Supervisors

The Division Supervisor shall direct the operations of strike teams and other resources within a GEOGRAPHIC AREA.

The Group Supervisor shall supervise FUNCTIONAL or _______ operations which may cross Division geographic boundaries.

A

task oriented operations

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6
Q

A large part of making brush fire strategy and tactics effective is preplanning.

Prior to the start of the brush season all officers need to review their commands to assure that training has taken place in the following areas:

A
  1. Brush Fire Hose Lays
  2. Helicopter Support
  3. Standard Wildland Firefighting Safety Rules
  4. Use of proper Firefighting Protective Clothing and Equipment
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7
Q

Prior to the start of the brush season, officers whose districts contain grass and brush areas should review their districts regarding the following:

A
  1. Brush Inventories
  2. Mountain area roads
  3. Condition of Fire Roads
  4. Canyon Areas
  5. Command Post Locations
  6. Staging Locations
  7. Helispot Locations
  8. Communication “Problem areas”
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8
Q

Our normal first-alarm brush response is based on a “hit it hard and fast” concept.

You can expect to get what resources on the initial dispatch?

A

-5 engines
-1 light force
-2 helicopters (at least one with water-drop capability)
-2 Chief Officers.

If it is a high hazard day, companies will be predeployed.

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9
Q

During a brush response, you should notify responding companies if you “have a loom-up”.

Note the shape, color and angle of the smoke column, as it informs you of ________.

A

wind direction and air stability, and hints at what is burning.

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10
Q

When you arrive at the scene of a brush, you should size up the condition and make an initial on-scene radio report.

Your sizeup report should consist of:

A
  1. EXACT LOCATION OF FIRE: It is a good idea to give map page numbers and cadastral reference in case someone is still looking.
  2. SIZE AND TERRAIN OF FIRE: An acre is an area about 200 feet by 200 feet. Terrain considerations include effect on the fire, hazardous areas, access to the fire, and noticeable barriers to the fire.
  3. MATERIAL BURNING: Light, medium or heavy brush?
  4. WIND DIRECTION AND SPEED: Up-canyon, down-canyon, etc.?
  5. EXPOSURES: Structures and other improvements. Is fire exposing more brush? Is fire threatening more than one slope or canyon?
  6. LIFE HAZARD: Need for police for evacuation, traffic control, etc.
  7. ASSISTANCE NEEDED: If you estimate that the job is too big for the first-alarm assignment, order help.
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11
Q

An acre is an area about ______ feet by _____ feet.

A

200x200ft

Another good rough measurement is that the playing area of a football field is about an acre.

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12
Q

What tactic?

______ attack is one where fire control starts at a point on the perimeter of the fire and works along one or both edges (flanks) toward the head of the fire, extinguishing as you go along.

This is the primary method used by the Los Angeles City Fire Department

A

-Direct attack

We normally use what is called a SCRATCH LINE ATTACK, which means that we work rapidly along the flank, making a control line just wide enough to establish control and then going back and coldtrailing the line later.

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13
Q

Advantages of a “scratch line” attack include:

A

-having a safe area (the burn area) for escape
-keeping the fire as small as possible
-eliminate uncertain elements involved in backfiring ops

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14
Q

Disadvantages of a “scratch line” attack include:

A

-a longer fire line
-more overhaul
-personnel working directly in the heat and smoke.

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15
Q

What tactic?

______ attack is one where the fire officer selects a place where the terrain is favorable for control of the fire. Fuel may be sparse and the land rocky, or a convenient road, ridge, or pre-cut firebreak may be selected to make a stand. The site selected may be some distance from the current fire perimeter and you concede all of the intervening territory to the fire.

A

Indirect Attack

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16
Q

Which tactic (direct or indirect attack) SHOULD NOT be used in heavy fuel, high winds or to stop the fire head?

A

Indirect attack

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17
Q

Advantages of the indirect attack method include the fact that personnel can work in relative comfort and are able to take advantage of favorable terrain, thus perhaps reducing the amount of coldtrailing necessary.

Disadvantages include:

A

safety is difficult to provide for as members are sometimes working in unburned brush and rough terrain (ridges, etc.).

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18
Q

In either the direct or indirect attack, the final fire perimeter must be coldtrailed thoroughly and patrols continued until the fire is dead out.

Most of our smaller fires are controlled with a direct attack and most of our larger fires are controlled with?

A

a combination of direct and indirect methods.

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19
Q

Your initial point of attack should be first to PREVENT LOSS OF LIFE, then to prevent property damage through further extension of the fire (protect exposures), then to confine the fire to its area of origin and then to extinguish it completely.

The most common action for a first-in engine company is to _______.

A

attack the hot flank.

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20
Q

In the fire area, consideration must be given to proper placement of apparatus. It is very important that streets are not blocked.

Consideration must be given to ______ into locations so that apparatus can exit the area if evacuation becomes necessary or to relocate as soon as the fire moves past a given location.

A

Backing

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21
Q

The MINIMUM ACTION to be taken by your company when assigned to PROTECT an immediately exposed structure should include:

A

-surveying the area you are protecting and giving priority of protection

While surveying area to determine which houses need to be protected, check for OPEN windows and doors on the exposed side. When the time comes for action, lay out enough hose to cover the entire structure INCLUDING the roof. Park the apparatus in a SAFE location, lay out a protection line, keep the engine RUNNING. When the fire has passed over, put out spot fires and move on to the next structure.

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22
Q

Structure Protection

The following are ways structures become ignited at brush fires:

A
  1. Flying brands igniting shingle or shake roofs.
  2. Heat or flames trapped beneath the eaves of a roof.
  3. Burning debris blown through ground or attic vents.
  4. Windows broken from exposure to heat and severe drafts.
  5. Doors or windows left open.
  6. Direct exposure from:

a. Brush, trees, shrubbery, dry grass, leaves.

b. Wooden fences (especially the split-stake type).

c. Wood piles, particularly if adjacent to windows or eaves.

d. Combustible rubbish piles.

e. Garden furniture pads and combustible furniture.

f. Motor vehicles

g. Bamboo or woven-reed windbreaks.

h. Combustible decorations or furniture near broken windows.

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23
Q

The following actions should be taken to aid in protecting structures:

A
  1. Close ALL doors and windows. Also, close all drapes, curtains and blinds. LIGHTWEIGHT curtains should be removed.
  2. Connect garden hoses.
  3. Place any available ladders to the roof on side away from fire.
  4. Roll up auto windows. Put the car in the garage, heading out.
  5. LEAVE LIGHTS ON IN STRUCTURE. You will appreciate why if you have to find that house up on the hill after dark or in smoke!
  6. Where possible remove combustible objects that are a direct exposure
  7. Place combustible garden furniture and pads in garage or house. In any event, do not leave them near a structure.
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24
Q

When you are sent to a fire (or moved up) to an area outside your normal radio frequency area, switch over to the new frequency when?

A

When you leave quarters.

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25
Q

The ultimate objective at a brush fire is to contain the fire to a given perimeter by?

A

establishing a fire control line around it

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26
Q

Fire Control Lines

A ______ line is an unfinished preliminary control line made as an EMERGENCY ACTION to check the spread of the fire, and to establish control of the perimeter. This method might be used on a small fire adjacent to the roadway.

A

Scratch Line

(A scratch line is only an aid in quick control of the fire and will have to be coldtrailed as soon as possible.)

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27
Q

Fire Control Lines

A ______ line is a firebreak that is wide enough for PERMANENT control that can be used in a direct or indirect attack. This type of line can be constructed by personnel with tools or tractors.

A

Control Line

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28
Q

When does Patrolling a fire control line begin?

A

must begin as soon as the line is established and must continue until the fire is “dead out”

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29
Q

The use of the 1¾” hose as a brush FIREFIGHTING line IS NOT recommended.

This is due to:

A

-high gpm nozzle flows
-nozzle reaction
-kinking at low pressures
-possible thermal damage to the hose jacket.

(Consideration should be given to using 1¾”, or larger diameter hose as SUPPLY lines between the apparatus and fire control line anchor point, if the distance is excessive thus minimizing friction loss.)

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30
Q

Methods of Brush Hose EXTENSION:

A

-Hose Rolls (for STEEP terrain and HEAVY brush)

-Bucket Brigade (pass equipment up line)

-Wet Line/Dry Line Method (drag dry line up control line for extension)

-Continuous Line Method (Line added at the apparatus, works better going DOWNHILL)

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31
Q

Pulling Hose with Helicopters

Sling load capabilities of a helicopter is approximately _____ lbs.

A

750 lbs

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32
Q

When a fire occurs in an area remote from a water source, the Incident Commander must decide whether to:

A

set up a WATER RELAY operation or have apparatus SHUTTLE water to the fire

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33
Q

Water Relay

When a relay is required for an initial commitment, the first-in company officer automatically becomes the ______ officer.

A

Relay Officer

(If a relay is needed after companies have been committed, an available BATTALION CHIEF may be assigned as the relay officer.)

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34
Q

Water Relay Operations

The relay officer should order the number of engines needed to complete the relay. Apparatus should lay hose “CARAVAN STYLE”

Estimate one apparatus per _____ mile PLUS one extra triple for the hydrant.

A

1/10th

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35
Q

_______ will permit water to be picked up from streams, lakes, swimming pools, and other sources of water.

This appliance may be utilized where the distance from, or the height above, the water source makes it impractical to draft with hard suction hoses.

A

Siphon Ejectors

(Siphon Ejectors are referenced by the SIZE of the INLET hose dimension)

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36
Q

COLDTRAILING is the same as OVERHAULING at a structure fire. Water alone is not sufficient, HAND TOOLS must be extensively used.

A well constructed coldtrail is HALF IN and HALF OUT of the BURN and a portion is scraped down to mineral earth (dirt).

What is the recommended width of the trail?

A

BETWEEN the SAME HEIGHT as the brush and TWICE the HEIGHT of the brush, depending on the terrain, wind, etc

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37
Q

Coldtrailing

In order to prevent burning or smoldering objects such as cactus, pineapples, logs etc. from rolling downhill past the fireline, it is necessary to trench below them.

A trench should never be LESS THAN ____ foot wide and _____ foot deep.

A

1ft wide by 1ft deep minimum

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38
Q

The worst thing for a shovel blade is paint due to mud and dirt sticking to the paint.

If you must paint your shovels, spray a thin coat of ________. It wears off almost immediately.

A

Aluminum paint

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39
Q

Coldtrailing Team

1st member cuts heavy limbs/brush
2nd member throws cut items into burn
3rd member scrapes trail to dirt.

The last man is the Captain. What is his job?

A

Inspect and guarantee that the coldtrail is secure.

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40
Q

Coldtrailing on a slope is easiest if done from the top down, but it is BEST if it is done from _____ to ______.

A

Bottom to top (better eye contact with ground)

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41
Q

Coldtrailing checklist:

A
  1. All smoldering material along the fire edge and into the burn is extinguished.
  2. All special threats such as logs, stumps low hanging limbs, pineapples, etc. have been eliminated as threats.
  3. You have looked for and removed all burning roots that are near the line.
  4. You have remained alert for embers or sparks in the unburned area across the line
  5. You have taken the line down to mineral earth.
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42
Q

Helicopter water tank filling

The ______ assumes responsibility for, and is the ultimate authority regarding the safe operation of a helicopter during any flight or ground activity

A

Helicopter Pilot

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43
Q

Helispot - Initial engine company actions

The Company Officer of the engine assigned the responsibility of establishing a helispot shall insure the following actions are taken (prior to helicopter arrival):

A
  1. Conduct a survey of the helispot location
  2. Transmit necessary info to first arriving helicopter pilot (wind direction, landing pad area, ect.)
  3. Establish helicopter water supply hose lay
  4. Assign personnel to key helispot positions
44
Q

Equipment needed for helispot filling operations:

A

-gated wye with 2-1/2” hose for Kam-Lok connection
-1-1/2” safety/protection line (also for dust abatement)
-dry chem (placed at wye)

45
Q

Helicopter Filling Safety

To prevent injury when connecting and disconnecting fill devices, KEEP FOOT ON SKID AT ALL TIMES. As the helicopter is filled with water its weight increases, causing the helicopter skids to spread up to ____ inches towards the outside.

A

6 inches

46
Q

Helicopter filling Safety

Minimum PPE’s that Shall be worn?

A

-Eye protection
-Ear protection
-Helmet with chin strap tight under chin

47
Q

Cal-OSHA requires that all members, who are actively engaged in wildland firefighting operations, be provided with the following protective clothing and equipment:

A
  1. Helmet
  2. Goggles
  3. Brush Jacket
  4. Nomex work pants or wool trousers.
  5. Gloves, suitable to the hazard encountered.
  6. Safety boots
  7. Fire shelter

In addition, LAFD policy requires the protective hood to be carried for additional protection, if needed.

48
Q

It has been noted in prolonged wildland firefighting operations that the greatest number of injuries occur from?

A

fatigue due to heat.

49
Q

Danger signs to watch out for in canyon bottoms are:

A
  1. Spot fires on the far side away from the main body of the fire. This is a sign that the fuel on the far side is pre-heating. The entire canyon could burst into flame without warning.
  2. Fire whirlwinds in the canyon bottom indicating unstable air.
50
Q

In a recent analysis, there were 4 common denominators found at brush fires where firefighters were killed:

A
  1. Relatively small fires or in seemingly “quiet” sectors of large fires.
  2. Relatively light fuels, such as grass weeds or very light brush.
  3. An unexpected shift in the wind direction or wind speed occurred.
  4. Deaths occurred when the fire ran uphill, trapping firefighters.
51
Q

A fire that burns down from a ridge to a canyon may be affected in a variety of ways: by the change in terrain; drafts; fuel moisture, etc.

One or all of the following may occur:

A
  1. The fire may go out.
  2. The fire may jump to the opposite canyon wall and create new heads.
  3. The fire may swirl about and spot both up and down canyon on the floor.
  4. The fire may fish-hook on one or both sides of its head and burn back towards the ridge.
  5. A blowup may occur on the canyon floor due to preheating.
52
Q

Chances of a canyon-bottom blow-up are fairly remote if the canyon is _____ yards or more wide.

In a narrow V-shaped canyon, a blow-up can spell disaster to any firefighters located there.

A

200 yards

53
Q

When you are working, always have your apparatus positioned for a quick exit. Back in if you cannot drive out. Keep the roads open

Do not park in the following locations:

A

-saddles
-at the tops of draws and chimneys
-above dense fuel masses
-in front of a running fire

54
Q

The fire shelter saves lives by reflecting RADIANT HEAT.

The foil will reflect _____ percent of a flame front’s radiant heat.

A

95%

55
Q

The two most important actions during entrapment are:

A

-staying under your shelter
-protecting airway, lungs, and skin by lying prone, face to ground.

56
Q

Deploying Fire Shelter

If you anticipate entrapment, NEVER WET YOURSELF DOWN. Wet clothing conducts heat _____ times faster than dry clothing, making skin burns more likely.

A

5x

57
Q

Shelter Deployment

Deployment sites should be free of fuels. Begin scraping away what fuels there are. Clear an area ____ by ____ feet (or larger, time permitting) down to mineral soil.

A

4x8ft

58
Q

Shelter Deployment

Enter the shelter so feet are pointing?

A

in the direction of the oncoming flames.

59
Q

Shelter Deployment

Flame fronts can generate winds of 50 mph or more; shelters must be held down firmly.

Keep your nose to the ground, approximately a ____-inch layer of cooler, cleaner air can be found at ground level.

A

6 inch

60
Q

Shelter Deployment

The shelter is designed for one person and sharing increases the risk of injury.

If sharing a shelter is unavoidable, how shall members share the shelter?

A

Lie face to face, noses to ground

61
Q

During prolonged entrapment, temperatures within the fire shelter can range from ____ to _____ degrees F.

Studies indicate by taking short, shallow breaths through the _____, air as hot as 400 degrees can be inhaled at LOW humidity for brief periods of time. This demonstrates the importance of keeping humidity low.

A

150 to 200 degrees

Nose

62
Q

When shall the fire shelter be inspected?

A

-monthly

-after being carried by members in the field.

63
Q

Inspecting fire shelters

______ is the most common type of shelter damage. If aluminum particles have turned the clear vinyl bag gray, remove the shelter from service.

A

Abrasion

64
Q

Inspecting Fire Shelters

Inspect the fire shelter for tears along folded edges. Tears are most likely to occur at the two ends where all the sharp edges come together.

Remove shelters from service when tears exceed _____ long.

A

one inch

65
Q

Inspecting Fire Shelters

Shelters with dents or punctures in the foil over 1 inch wide or with ____ inch or more of foil missing shall be removed from service.

A

1/2”

66
Q

The wildland fire environment consists of what three major components?

A

-topography (less variable)
-fuels
-weather (most variable)

67
Q

The elements of weather that will affect fire behavior are?

A

1) wind speed and direction
2) relative humidity
3) temperature
4) atmospheric stability
5) precipitation.

(In some areas of the Country, the occurrence of lightning is a sixth important factor, although, in Southern California, this is not a major concern)

68
Q

Wind

It is estimated that doubling the wind velocity will approximately _______ the rate of fire spread.

A

quadruple

69
Q

The most severe weather condition for brush fires in our area is a dry ______ wind, called a SANTA ANA, which blows from the NORTH.

Santa Anas usually last 2-3 DAYS and are hazardous due to their extreme DRYNESS and VERY HIGH VELOCITIES of WIND.

Santa Anas are most common in the COOL MONTHS of ______ through ______.

A

Foehn wind

September through April

70
Q

Fire Weather

Stable air vs Unstable air:

A

STABLE AIR = Predictable fire behavior
Stable air can be recognized by:
-POOR VISIBILITY at low levels (smog, fog)
-STRATUS-type CLOUDS
-STEADY winds
-smoke columns that DRIFT APART after limited rise.

UNSTABLE AIR = UNPREDICTABLE fire behavior
Unstable air can be identified by:
-vertically-developing CUMULUS clouds
-TALL smoke columns
-dust devils
-CLEAR air
-GUSTY winds

71
Q

Local, diurnal air movement at a fire scene is of great importance to firefighters.

If the air is relatively calm, it will flow up slopes, up-canyons in the DAYTIME from about _____ hours until ______ hours early evening.

A

1000hrs to 1300hrs

(Then it will slow and begin flowing down-slope, down canyons at night.)

72
Q

The presence of WHIRLWINDS or DUST DEVILS is a good indicator that conditions are HIGHLY UNSTABLE and favorable for __________.

A

UPSLOPE convective winds and erratic, or extreme fire behavior.

73
Q

Firefighters must be acutely aware of the conditions that precede thunderstorm winds, for when they occur, erratic and dangerous fire behavior can be expected.

Thunderstorm winds are the UPDRAFTS that are found in and beneath growing _____ clouds.

________ are in the last stages of full thunderstorm development, and cold air outflow from decaying thunderstorm clouds.

A

cumulus clouds

Downdrafts

74
Q

Atmospheric stability is defined as _________.

A

The resistance of the atmosphere to vertical motion.

(UNSTABLE air encourages vertical movement of the air and increases fire activity. STABLE air discourages vertical movement of the air and decreases fire activity.)

75
Q

Atmospheric Stability

Common indicators of unstable air are:

A

-cumulus clouds that develop to great altitudes
-smoke that rises to great heights
-dust devils
-good visibility
-gusty, erratic winds.

76
Q

The most important fire behavior factor dealing with topography is?

A

-Steepness of slope

(changes in slope have direct and profound effects on fire behavior)

77
Q

Topography

The position of a slope is important because this influences the TYPES and LOADING of FUELS and their AVAILABILITY.

South and west facing slopes characteristics:

A

-have the greatest number of fires
-cure out earlier in the year
-typically smaller and drier light flashy fuels
-average relative humidity is low
-have the longest fire season
-most exposure to sun

78
Q

Topography

The position of a slope is important because this influences the types and loading of fuels and their availability.

NORTH facing slopes characteristics:

A

-heaviest fuels
-highest fuel moisture
-lowest average temperature
-lowest rate of fire spread
-lowest fire starts

79
Q

Fuels

Our fuels can be classified in what three basic categories?

A
  1. Grasses and weeds (Light Fuels)
  2. Coastal sage scrub (Moderate Fuels)
  3. Mixed chaparral (Heavy Fuels)

(Small diameter dead fuels are the PRIMARY fuels that carry a fire at its flaming front.)

80
Q

______ content is generally considered the MOST important influence on FLAMMABILITY of wildland FUELS.

A

Moisture content

81
Q

Most of the brush fires in the City of Los Angeles occur in what type of fuel complex?

A

Coastal Sage Scrub (Moderate Fuels)
-mainly non-woody brush species

82
Q

The Brush Clearance Program is administrated by the Brush Clearance Unit of the Fire Prevention Bureau. Each year, on APRIL 1st, an information letter is mass-mailed to the owners of property in the Mountain Fire District and the Mount Washington. The letter explains the City’s brush clearance requirements, the responsibility of the property owner to maintain their property in a safe condition, and asks property owners to clear the hazardous brush before _____ 1st.

A

May 1st

83
Q

During the month of May, a Brush Task Force, consisting of volunteers from the Bureau of Fire Suppression, inspect all properties in the Mountain Fire District, Buffer Zones, El Sereno and Mt. Washington. Additionally, El Sereno and Baldwin Hills are inspected by local fire station personnel.

During this inspection process, all hazards encountered are cited using a “Notice of Noncompliance”. Property owners are given _____ days to comply with the notice.

A

15 days

84
Q

Much of the Incident Command System, as we know it today came from the original planning groups of _______.

A

FIRESCOPE

85
Q

Bulldozers

While building a line in heavy fuels, a bulldozer operator will usually construct a “safety island” about every _____ feet along the line.

This island may be used by ground personnel to deploy fire shelters in the event they are over run by a fire and will be _____ feet in diameter.

A

600ft

100ft

86
Q

Staging is a location where incident personnel and equipment are assigned on a ____ minute available status.

A

3 minute

87
Q

The wind speeds quoted in weather forecasts are wind speeds measured at ______ feet above the surface in light fuels, or _______ feet above the mean cover height in heavier or taller fuels.

A

20 ft for both answers

88
Q

Wind Eddies:

A

-Friction at the surface causes the wind to swirl and eddy on the lee side of obstructions, thus producing erratic fire behavior.

-As wind is channeled up or down canyons, eddies form in bends in the canyons and in the mouths of side canyons branching off the main canyon.

-Strong winds blowing over ridges will eddy on the lee side ridge causing the air to flow back toward the ridge

89
Q

The average speed of up-canyon, daytime winds are about ____ to ____ MPH.

A

10 to 15 mph

90
Q

The average speed of down-canyon, nighttime air flows average ____ to ____ MPH

A

5 to 8 MPH

91
Q

Relative Humidity:

-As a rule of thumb, relative humidity doubles with each ____ degree decrease in temperature

-Conversely, RH is HALVED with each ____ degree increase in temperature.

A

20 degree (both answers)

92
Q

LAFD’s fire weather information is calculated mostly from which fire station location?

A

FS 108

93
Q

The ignition temperature of brush varies between 400 and 700 degrees Fahrenheit.

A practical average temperature is considered to be about _____ degrees Fahrenheit.

A

540 degrees

94
Q

In a rising air mass, the temperature of the air mass drops about _____ degrees with each 1000 feet it increases in altitude.

A

5.5 degrees

(When the temperature drop exceeds 5.5 degrees per 1000 feet elevation, the air is unstable, and encourages the vertical movement of air. This action causes large volumes of air to rush in at the base of the fire to replace air lost in the convection column. This rapid exchange of air can lead to extreme fire behavior.)

95
Q

When DECIDING on a direct or indirect attack or a combination of both, you are beginning to formulate a ________.

A

control plan.

96
Q

With the EXCEPTION of safety, __________ is our prime consideration under any conditions

A

structure protection

97
Q

The basic rule of radio use is to _________.

A

limit conversation to essential messages.

98
Q

In the initial phase of a brush fire when resources are needed quickly, ask MFC to dispatch a specific number of ____________.

A

the closest ENGINE COMPANIES and Chief Officers (1 per 5 companies).

(This will provide companies FASTER THAN asking for STRIKE TEAMS and keep the radio traffic to one central contact at staging.)

99
Q

In selecting tools for coldtrailing, the most overlooked tool is the __________.

A

McCloud

(Working in GRASS, the McCloud is more reliable than a hose line and faster than a shovel. It is a good tool for TRENCHING below stumps, logs and pineapples. It is ideal for SCRATCHING through leaf mold to get to mineral earth.)

100
Q

The minimum clearance between DUAL pads (center to center) for a helicopter water supply operation is ______ feet.

A

150

101
Q

Policy on BACKFIRING at brush or grass fires is as follows:

A
  1. Prior to backfiring, APPROVAL shall be obtained from the IC.
  2. Backfiring brush or grass shall be used as an EXTINGUISHMENT tool in the same mode as brush or grass removal by tractor, hand tool, etc.
  3. Backfiring SHALL NOT be attempted unless all exposed STRUCTURES are PROTECTED or considered at RISKS.

(Exception to the above policy is in DIRECT LIFE THREATENING SITUATIONS)

102
Q

During a water shuttle operation, apparatus should be parked _________.

A

Single File

103
Q

_______ is defined as the MANNER in which fuels IGNITE, flames DEVELOP, and fire SPREADS

A

Fire Behavior

104
Q

It is generally considered that at _____% Relative HUMIDITY, conditions are becoming FAVORABLE for brush fires.

A

30%

105
Q

TEMERATURE is important because of the effect it has on:

A

-humidity and air movement

-preheating fuels

-firefighters

106
Q

Winds affect the intensity, direction, and rate of spread of wildland fires by:

A
  1. ANGLING the flames to PREHEAT fuels by RADIATION.
  2. ANGLING CONVECTION CURRENTS to PREHEAT fuels ahead of the fire.
  3. Providing a fresh and continuous supply of OXYGEN to the fire.
  4. Speeding up MOISTURE EXCHANGE between the air and the fuels.
  5. CARRYING burning embers and firebrands to cause SPOTTING of the fire downwind.
  6. Causing fires to burn ERRATICALLY.