RFD (SCBA)
What indicates a good and bad battery on the RPG?
The RPG lets off three chirps at start up. Green LED light indicates a good battery and red indicates a battery that needs to be replaced.
how much does the voice amp weigh? how long will it last?
The Scott voice amplifier weighs approx 5.9 oz with the 9v battery inside and lasts for about 20hrs of continuous use.
What is an SCBA?
The Self Contained Breathing Apparatus (SCBA) is a respirator intended to provide protection to an individual when entering into, working in, and exiting an unknown, oxygen deficient, or unbreathable toxic environment.
is the UAC a male or female connection? what pressure does the pressure relief valve activate?
The UAC has a Male end capped by a rubber dust protector. The UAC also has a pressure relief valve that lets off any pressure exceeding 4500 PSI.
what is the UAC used for?
The UAC is used to connect to a RIC pack to supply a downed firefighter with a means to connect to a good oxygen source
After the clear resin coat is put on the cylinder what is the last and final process for the cylinder?
The cylinder is sanded and gel coated by hand before being placed under UV lamps for the last bit of the curing process.
what immediately follows the high pressure hose?
The pressure reducer
what protects the valve from damage?
The valve has an electrometric (rubber designed to absorb an impact) bumper on the end to protect the valve from damage.
What is the purpose of the frangible disk in the valve assembly? what is it made out of? when is it rated to burst?
There is also a tridimensional frangible disk made out of rosewood steel. Appears as a nut on the valve, consist of a copper wafer. The frangible disk prevents over pressurization of the cylinder. The disk is rated to burst at 7500 PSI.
what is the pressure at on the pressure reducer assembly when there is flow?
WITH flow = 55 psi @ 400LPM
how do you know when to replace the pak alert batteries?
When the battery needs to be replaced the alarm will chirp every few seconds until the battery is replaced.
what size mask is on the RIC Pack?
XL
What two functions can you use a purge valve for? at what LPM will the purge valve deliver air?
a purge valve which can be used as a defogger or for emergency air. Furthermore, the purge valve delivers air at 125-175 LPM.
What is the purpose of the pressure reducer? what is it made out of?
a. The pressure reducer is made of an aluminum alloy. The pressure reducer is made to reduce the pressure from 4500 psi to a breathable pressure
Cylinders manufactured before July 2001 are to be tested?
every three years
What does the discharge port on the valve assembly prevent?
hole in thread to prevent usage on different systems.
how many components make up the pressure reducer? what are they?
i. High pressure inlet ii. Primary reducer 85-100 psi iii. Secondary reducer 145-165 psi @25% of cylinder iv. Low cylinder transfer valve v. Automatic transfer valve vi. Push to test button vii. Relief valve
what is the mask lens on the AV3000 mask lens made from?
made from a polycarbonate
What is the cylinder valves made of?
made from forged alluminum
what are total wrapped cylinders?
painted yellow, fiber glass wrapped on top and bottom.
How many pounds of tourque and psi can the frangible disc on the valve assembly take?
silver bolt with copper disc. 125lbtorque/ 7500 psi.
After cylinder is deep drawn what is the next process for the cylinder?
the cylinder is wrapped in carbon fiber that has been dipped in resin which gives the cylinder tensile strength.
After the cylinder is wrapped i carbon fiber what is the next process?
the cylinder is wrapped in fiberglass to protect the carbon fiber.
what delivers air from the pressure reducer to the mask mounted regulator?
the low pressure hose
what is the pak alert powered by?
two 9 volt batteries
what is a MMR what is its purpose?
(Mask mounted regulator) provides a passageway for air to flow from the low pressure hose into the face piece for breathing.
What qualifies air as grade D air?
-02 content of 19.5-23.5% -Hydrocarbon condensed content 5mg/m3 of air or less -CO content of 10 ppm or less -CO2 content of 1,000 ppm or less -Lack of a noticeable odor -With a max dew point of -65 degrees Fahrenheit or less
What two testing process do cylinders go through?
1 out of every 200 cylinders are stress tested where they are filled and emptied over and over again. Also 1 of every 200 cylinders are burst tested, where they pressurize the cylinder until it fails, usually around 19000 psi.
What defines an IDLH environment?
1-Harmful exposure- Any environment that is oxygen deficient, O2 below 19.5 %, exposure to dust, fumes, mists, vapors chemicals or gases. 2- Hazardous environment- A place where a firefighter can be exposed to physical or mechanical hazards which are likely to cause injury. 3- Hazardous substance- one by which by reason of being explosive, flammable, poisonous, corrosive, oxidizing, irritant, or otherwise harmful.
what does 1 yellow and 1 red light on the HUD mean? (yellow blinks once a second)
1/2 cylinder
what does one red light that blinks 10x a second on the HUD?
1/4 cylinder
How long is the high pressure hose line in the RIC pack?
10' long
How many LPM are allowed through the purge valve?
125-225 LPM in reducer failure or de-fog
At what PSI does the vibra alert activate at?
145PSI
What is the service life of a single cylinder?
15 years
How often do we change batteries in SCBA?
1st of January
How many reducers are in the pressure reducer?
2
where and what batteries are used to operate the HUD?
2 AA batteries at the high pressure reducer.
how much does the caribeener on the drop bag weigh and what is the tensile strength on it?
2.6 oz and a tensile strength
How long of no motion will the PAK alert begin to activate?
20 seconds
How long is the EBSS?
3 feet
How long is your EBBS line?
3 feet
What is the breaking strength on the rope of your drop bag?
3,850lb. breaking strength
What does 1 green and 1 yellow light on the HUD mean?
3/4 of a cylinder
how many minutes are our cylinders rated for? Cubic feet of air?
30 min 45 cubic feet of air
How many parts make up the valve assembly? what are they?
4 parts -hand wheel, frangible disc, discharge port, and dual pressure guage.
How many LPM can the demand valve piston deliver up too?
400 LPM
how many minutes are our ric pack cylinders rated for? Cubic feet of air?
45 min 65 cubic feet of air
What is the rminute rating on the cylinder that hazmat carries? cubic feet of air?
60 min 87 cubic feet of air
What is the inner lining of the cylinder made of?
6061 T6 Aluminum
What type of rope is in the drop bag?
65' of 8mm nylon Static kernmantle rope
How long is the high pressure hose on the SCBA?
9"
How loud is the alarm on the PASS when activated?
95 decibels at a 10 foot distance
What does the MMR mount too?
AV3000 facepiece
what is the air pack made out of and what are some features that go along with it?
Air pack 50 is made from ionized aluminum. It is contoured to fit the users back. The lower portion of the frame has the cylinder hanger bracket. Towards the middle is the side mounting bracket for the pressure regulator. The straps are made from Kevlar and consist of alligator slips and a buckle for the waste strap.
what % of strength comes from the liner and wrap of the cylinder? when would it rupture without the wrap?
Aluminum liner is 20% strength wrap is 80%. Without the wrap rupture @ 900 psi
what pressure are cylinders tested too?
Blaze out @ 5/3 the working psi 7500.
besides the hose that connects the RPG to the RIC/UAC what else connects the two together?
Cabels. . Cables are protected in a steel braided casing that is approx 24inches long. Cables go from RIC/UAC to the RPG.
Who is the SCBA Program manager?
Captain Ward @ station 5
what is Carbon Total wrapped cylinders?
Carbon around the bottle, wrapped with fiber glass and epoxy resin. Appears greyish.
how much does a carbon fiber cylinder weigh?cubic feet of air? what type of air? at what pressure?
Carbon fiber high pressure cylinders weigh 9.4 lbs. Hold 45 cubic feet of type 1 "D" air at 4500 PSI
Who is the SCBA Cylinder Program Manager?
Chief Mckinister
What does 2 green lights on the HUD represent?
Cylinder is full
How often do cylinders need to be hydrostaticly tested?
Cylinders are to be hydrostatically tested every 5 years if manufactured after July 2001
What is the process called that makes our cylinders seamless from one piece of alluminum?
Deep Drawn
MMr delivers air at what PSI? why this pressure?
Delivers air a t 15.7 PSI, just above atmospheric pressure which is 14.7.
what is the donning switch's purpose?
Donning switch prevents rapid air loss when cylinder is open and face piece is off of the user
What are hoop wrapped cylinders?
Flat bottom, painted yellow, body is only fiber glass. Oldest in dept
What immediatly follows the UAC?
Following the UAC is a 9 inch High pressure hose. Constructed of a rubber hose covered with a steel jacket covered rubber outer sheath.
where does the remote pressure gauge connect to?
Gauge connected to the RIC/ UAC via a 37"hose that is steel braided
what is the hazards of the compressed air in the cylinders?
Hazards-compressed gas on unprotected skin can enter the blood stream causing air embolism or other tissue damage. Into a body cavity may cause serious or fatal injury
what connects the scba assembly to the cylinder? what does it consist of?
High pressure hose coupling.The coupling consist of a Teflon o ring and a hex fitting for loosening only
what pressure does the low pressure hose supply if the primary reducer is working? if the secondary reducer is working?
Hose supplies 85-110 psi if primary reducer is working and 145-165 if secondary reducer is working
What immediately follows the high pressure hose coupling?
Immediately following the coupling is the Rapid Intervention Crew Universal Air Connection or RIC UAC
After complete assembly how much does a cylinder way and how many cubic feet of air can it hold?
In the end the cylinder will weigh 14 pounds and hold 45 cubic feet.
What is the low pressure hose line on the RIC pack connected too? How long is it? what is it pressure tested too?
It is connected to the rescue mask, it is 6' long and is tested to 250 psi.
when do we inventory our cylinders?
June 1st and december 1st
what are Kevlar total wrapped cylinders?
Kevlar around the bottle, wrapped with fiber glass and epoxy resin. Appears whitish.
what are the straps on the AV3000 made from? what sizes do they come in?
Kevlar, small, medium and large
whats the max working pressure of the low pressure hose? what is it made out of?
Made from a ½ inch neoprene rubber. Max working pressure is 300 psi.
after the fiberglass is applied what is the next process?
Manufacture stickers are applied and then a clear resin covering?
Who manufactures our cylinders?
Manufactured by luxfor and sold to scott.
What is the NFPA standard for open circuit SCBA's?
NFPA 1981
What is the NFPA standard on PASS devices?
NFPA 1982
what is the pressure at on the pressure reducer assembly when there is no flow?
No flow = 70-100 psi
who makes the cylinder valves?
Our cylinder valves are made by Sherwood Valve Company in Columbus, Ohio
When is the pak alert activated
Pre-alert is activated at 20 seconds of motionless response. The beep is omitted at 60-100 deciples. After the pre alert the alarm escalates every three seconds and at 30 seconds of motionless goes into a full alarm
what are the numbers on the neck of the cylinder represent?
RFD inventory number located on the neck of the cylinder. Starts with XX, representing the year the department purchased the cylinder, next three numbers are the number for this cylinder purchased this year.
what are the 4 circumstances where we will wear our scba? what SOP is it?
SOP 3.02 a. The atmosphere is immediately dangerous to life and health (IDLH). b. The atmosphere is potentially an IDLH. c. Atmosphere can rapidly become an IDLH. d. Atmosphere is unknown.
How often does SCOTT recommend to test the RIC cylinders?
Scott recommends test every 2 years
What type of hand wheel is on the valve assembly?
Spring loaded ratchet type
Who fills our air cylinders?
Station 3
Who refills our Cylinders?
Station 3
Who is in charge of fit testing of the AV300?
Station 9A Captain
How many LPM does the EZ flow regulator deliver?
The EZ flow regulator delivers approximately 160 LPM to a peak flow of 500 LPM.
