Random Academy Questions Flashcards
Open Trust Web
70ft
Metal Gusset Plate
80ft
Why does LAFD carry 750 ft. of 4”?
○ Hydrants are spaced at most 600 feet away in low density residential, and if each stick of hose can range from 40-50 feet, then 15 sticks of hose at 50’ would be 750’ but if the stick was 40’, you could still reach 600’.
○ Captain Randy Beech, engine 52 laid out the whole bed, didn’t have enough supply line. He wrote letters to get more hose on the engines and cited division 9 of the fire code, low density to get more than 600’ of hose on the engines
○ Another reason for 600’. If you lay a big fire where you have the long distance hydrant spacing and you use up 600’, you still have 100’ which is needed to supply a ladder pipe plus 50’ in reserve for a burst section
What type of roof is the roof prop where we do up and over?
Conventional Gable
What is the acronym for lightweight convention roofs?
○ Wooden I-beam
○ Open web
○ Open web bar joist
○ Metal gusset plate
○ Panelized
○ Concrete
High rise buildings are how many feet tall?
Highest occupied space is 75’ from the entrance
Who do skylights every 8 feet usually indicate?
Panelized roof
What are the 5 different cutting operations we use on the panelized roof?
○ Louver off main beam (Defensive)
○ Louver off a purlin (Defensive)
○ Offensive louver (Offensive)
○ Peel back (Offensive)
○ Drop cut (Offensive)
Laminated beams will normally run in which direction?
○ The length of the longest part of the building
○ Can span all the way up to 100 feet in length
What are the blue strands in the halyard rope?
○ Dacron
○ Used for grip strength throughout the rope, as well as identifying the rope
What size is the halyard on the 35’ extension?
⅝”
What size is the halyard on the 20’ extension?
⅜”
How long are the sections of the 12x?
7 feet sections
How long are the sections of the 14x?
9 feet sections
How many layers of varnish do ladders need?
minimum 3
What kind of hydrants are at the airport
Subsurface (green or yellow indicator)
What kind of hydrants do we have
○ Purple: reclaimed
○ Red: high pressure
○ Yellow: normal pressure
■ Sizes: 2.5, 4, 4x4, 2.5x4
What is the heat rating of the CAIRNES 1044 Helmet?
500 degrees for 5 mins OR 15 seconds of direct flame impingement
Rung spacing on the aerial ladder
14”
First stage regulator takes SCBA pressure down to?
115 PSI
What is the actual size of a 2x4?
1 ½” x 3 ½”
USAR Stations
3, 5, 27, 88, 89, 85
Hazmat Stations
21, 48, 87, 95
How much damage can the aerial withstand before it is out of service?
1/16” by 1”
What does “URM” Stand for?
Unreinforced masonry
Plywood sizing
⅜”, ⅝”, ½”, 1”
GRAB LIVES?
Gauge, Radio, Activate pass, Breathing, Low, Illuminate, Volume, Exit, Shield, Airway
Cut teeth and drive teeth on a Chainsaw?
33 cut teeth and 66 drive teeth (the start of the chain is shown by two cut teeth facing the same direction. Normal orientation is alternating on each side)
4 Types of Maps Carried on Engines, Trucks, & Rescues?
800’ Cadastral, 1200’ Cadastral, Thomas Guide, First in District Map
What are the handlines PSI and GPM?
1” = 10-40gpm @100 psi
1&½(red) =125gpm @75 psi
1&¾ (yellow)=200gpm @75 psi
2&½ (green) = 325 gpm @50 psi
How much hose do we bring to a car fire per LAFD policy?
100 feet minimum of 1&½ line
Top 3 tool choices for sounding on a roof?
1.) D–handle rubbish hook
2.) D-handle pike pole
3.) Ax
How many feet is a belay line?
300 feet
What are the four sections of the aerial ladder?
base—>inner—>outer—>fly
How many pike poles are carried on the truck?
6
- 2 (6’ poles)
- 2 (12’ poles )
- 2(16’ poles )
What is the general maintenance for an ax?
Boiled linseed oil (wood handles), Metal polish and steel wool (axe head), neatsfoot oil (applied by hand or gloved hand for scabbard), milled bastard file for sharpening (approx 60 degrees, in between butter knife and razor )
150’ Drop-bag chord diameter?
5/16” dacron braided line
What is the belay line in a two line rope system rated at?
10,000 lbs
What are the LAFD carabiners rated at?
9,000 lbs
What lengths are the blue, yellow and red webbing used for a 2 line rope system?
Blue= 5 feet, yellow= 12 feet, red= 20 feet (Bring,Your,Rope)
What are the components that make up a high rise hose pack?
2 hose packs of 100’ each (two 50’sections)
■ 2” Single jacket rubber nitrile hose
■ 1 ½” couplings
■ TFT complete spray nozzle with 1 ½” coupling and
w or w/o pistol grip (yellow - 200 gpm @ 75psi)
■ Second bundle 2 ½” to 1 ½” gated wye
■ 4 hose straps for each bundle
What is unique about the fabric make up of our SCBA backpack
○ Nano cell ripstop tech
■ Designed to separate each “cell” to create a
water repellent effect.
■ Helps with keeping the pack dry
■ Helps with the overall weight of the SCBA
backpack harness
How many full turns does it take to shut-off water from the main to a hydrant
○ 18-26 full turns
○ 98% of the time it’s clockwise
○ 2% is counter clockwise
What is the difference between a PIV & OSY?
○ The PIV will shut off/control the sprinkler system
within a building while the OSY will shut off/control
the main water supply for the entire complex
○ PIV has an indication on it that either says “open” or
“shut” indicating if it is on or off. ○ OS&Y is big and
ugly, usually hidden from public view and is found at
big commercial buildings or apartments
What kind of chain saws does the LAFD use?
Stihl 038 Magnum chainsaw
What are the two ways to engage the chain brake on a chainsaw?
Mechanical and automatic
How can the user engage the chain brake mechanically?
By pushing the hand guard forward with the left hand, it is used for moving from place to place.
What are the two ways the chain brake can be automatically engaged on a chainsaw?
○ During chainsaw kick back, causing left hand to strike handguard. This occurs within 1/10 of a second.
○ Some saws are equipped with an inertia operated chain brake that automatically engages when a violent movement occurs (I.e. falling and dropping saw)
How long can our radios be continuously turned on and when are we required to replace the battery? Pg.12, volume 2, 4-7 comms
○ Each portable radio should have two batteries and
should be changed during morning relief
○ The battery should also be changed:
■ After continuous use in excess of 3 hours
■ The radio LCD indicates “Low Battery”
■ Audible “chirp” sounds when radio is turned on
When do Diamond, Carbide or Combination blades on a rotary saw need to be replaced?
When any damage is present on the blade
When do abrasive blades need to be changed on a rotary saw?
○ 14”-12” = in service, 12”-9”= training only <9”= out of service
○ When blade becomes unusable, write F-175 then tag blade with a piece of tape that reads “unsafe”
How many parts per million of CO are considered deadly?
4000 ppm
What 5 gasses do the gas meters carried on engines and trucks read?
Oxygen (O2), Carbon Monoxide (CO), Carbon Dioxide (CO2), Methane and Hydrogen Sulfide
Where do the chock blocks go when chalking a truck?
On the front tires
How many feet of extension cord are on the fly wheel on the truck?
200ft
What is an indication of a “pre-1943” building from the exterior?
An outside standpipe (riser) with a fire escape. After 1943 all risers were moved inside of highrise buildings
What are two types of highrise hose packs we can use at the LAFD?
Standard (Double stack) or the Gasner/Cleveland (single stack)
What does an LAFD truck need in order to be considered “in service”?
1.) holmatro power tools 2.) ventilation/forcible entry tools 3.) 256 feet of ladders
What are the steps to maintaining a 24’straight ladder?
○ Use 60-120 grit sandpaper, and a ladder scraper for removing the varnish
○ Once factory varnish is gone we will use Marine-O-war spar varnish to give the ladder UV protection (let 1st coat sit 12-24 hours)
○ Use steel wool or sandpaper to score the ladder to make it more adhesive for the next layer of varnish to stick
○ When maintaining ladders stay away from RA towels because the fibers may ruin the grain of the ladder
○ Metal yellow paint will be used on the shoes to prevent oxidation
What does “grit” mean when using sandpaper?
The smaller the number the more abrasive the sandpaper is, the bigger the number the
What are the names of the 4 bureaus
South
Central
West
Valley
What battalions are in the South Bureau
6
13
18
What battalions are in the Central Bureau
1
2
11
What battalions are in the West bureau
4
5
9
What battalions are in the Valley Bureau
10
12
14
15
17
What is the estimated population of Los Angeles
4 million
NFPA 1851
Sandard on Selection, Care, and Maintenance of Protective Ensambles for Structural Fire Fighting and Proximity Fire Fighting PPE
NFPA 1852
Standard on Selection, Care, and Maintenance of Open-Circuit Self Contained Breathing Apparatus NFPA 1952
What is the busiest fire station in LAFD
Statinon 9
