BA Flashcards
Duration of SCBA work set?
Effective duration exceeding 15mins
What carries oxygen around the blood?
Haemoglobin
5 symptoms of heat exhaustion?
Burning sensation on skin
Lethargy
Abdominal discomfort
Nausea
Dizziness
What type of BA does ACTFR use?
Open circuit
A breath is initiated at what level of C02?
4%
What exchanges oxygen and CO2 in and out of blood?
Alveoli
Describe stage 1 control board?
Incident is small and unlikely to be protracted
Maximum 4 BA wearers
Describe stage 2 control board,
4-12 BA wearers working in risk area
What are BA control equipment?
Tally tag for each wearer
Electronic timer clocks
Stage 1 control board
Stage 2 control board
Main control
What are the entrapment procedures?
Send radio signal to entry control officer
Activate DSU if fitted
Remain calm and avoid exertion to maximise air
If charged branch available, saturate combustible material to avoid spread of fire
Find safe space near wall, pillar or structural support where a rescuer can locate you
Air consumed should not exceed 10L/M
What is the minimal crew for BA?
2 people
What are the alarm signals of the DSU?
Pre alarm 18-23 seconds of no motion
4 red intermittently pulsing LEDs
Progressively louder audio
Least are 2 thing that can cause oxygen deficiency in an atmosphere?
Consumption of O2- combustion
Displacement of O2- chemical agents being introduced to atmosphere
If a cylinder is at 150 bar what is the working duration?
13.25 minutes
What pressure line does the rescue set come off?
The medium pressure line
Define Cylinder durations?
Full duration- the time for a fully charged cylinder to empty
Working duration- the time taken from cylinder is started until the low pressure warning whistle is sounded
Saftey margin- The time taken from when warning whistle starts sounding to the cylinder being completely exhausted
What are BA cylinder markings?
Water capacity
Test date due
Fill pressure
Manufacturers mark
Specification number
Original tare mass
Serial number
Date of original test
Approval number
Test pressure
What are the components of the face mask?
Speech transmission diaphragm
Exhalation valve
Inner mask
Polycarbonate visor
Head harness and neck strap
Demand Valve port
When does the warning whistle sound?
55 bar give +- 5 bar
What is the purpose of the silicone inner mask?
Reduces CO2 dead space in mask
Prevents fogging/misting in mask
What does carbon monoxide do to haemoglobin?
Carbon monoxide has 200 times the affinity to haemoglobin pushing oxygen off haemoglobin travelling through blood stream
Components of a Scott propak?
Harness and backplate
Cylinder band and clamp
Cylinder connector assembly
Pressure reducer
Demand valve and supply hose
Face mask
Pressure gauge and warning whistle
Rescue second mask attachment
Cylinder
What are the two types of compressed air SCBA?
Work sets exceeding 15 minutes
Escape sets less than 15 minutes
What is the purpose of the self contained breathing apparatus?
The function of the breathing apparatus is to enable the wearer to work in an atmosphere that would not otherwise support life
