BA Flashcards

1
Q

Describe the duration and usage SCBA Work Set?

A
  • Effective duration exceeding 15 mins
  • Operate on lung governed demand air
  • Only used in conjunction with full facemask
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2
Q

What carries oxygen around the blood?

A

Haemoglobin

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3
Q

What are 5 heat exhaustion symptoms?
Word for word not MC

A

BLAND

  • Burning sensation on skin
  • Lethargy
  • Abdominal discomfort
  • Nausea
  • Dizziness
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4
Q

What type of BA does ACTF&R use?

A

Open circuit

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5
Q

A breath is initiated at what level of CO2?

A

4%

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6
Q

What exchanges oxygen and CO2 in and out of blood?

A

Alveoli

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7
Q

Describe Stage 1 Control Board?

A
  • Incident is small and unlikely to be protracted
  • Maximum 4 BA wearers
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8
Q

Describe Stage II Control Board?

A

4-12 BA wearers working in risk area

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9
Q

What are the BA Control equipment? (5)
Word for word not MC

A
  • A tally tag for each wearer
  • Electronic timer clocks
  • Stage I Control Board
  • Stage II Control Board
  • Main Control
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10
Q

What are the entrapment procedures? (6)
Word for word not MC

A
  • Send radio signal to Entry Control Officer
  • Activate DSU if fitted
  • Remain calm and avoid exertion to maximise air
  • If charged branch available, saturate any 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 10 lpm
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11
Q

What is the minimum crew for BA?

A

2 people

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12
Q

What are the alarm signals of the DSU?

A

Pre-alarm - 18-23 secs of no motion, 4 red intermittently pulsing LEDs and progressively louder audio

Alarm - 30-35 secs of no motion, 4 red constant flashing LEDs and loud audio alarm

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13
Q

What are 2 things that can cause oxygen deficiency in an atmosphere? Not MC

A
  1. Consumption of O2, eg. combustion
  2. Displacement of O2- chemical agents being introduced to the atmosphere (dry chem, CO2 extinguishers)
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14
Q

What is the formula for calculating cylinder duration?
(In test MC, missing “consumption” answer was “none of the above”)

A

Water capacity x pressure x compression factor over consumption = full duration

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15
Q

If a cylinder is at 150 bar, what is the wording duration?

A

=13.25 minutes.

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16
Q

What pressure line does the rescue set come off?

A

Medium pressure line

17
Q

Define the cylinder durations. (Word for word not MC)

A

Full Duration – the time taken for a fully charged cylinder to go from full to empty.

Working Duration – the time taken from the moment a cylinder is started until the low pressure warning whistle is sounded

Safety Margin – the time taken from when warning whistle starts sounding to the cylinder being completely exhausted

18
Q

What are BA Cylinder markings? (10) (Need to know at least 3, not MC)

A
  • Water capacity
  • Test Date Due
  • Fill Pressure
  • Manufacturer Mark
  • Specification Number
  • Original Tare Mass
  • Serial Number
  • Date of Original Test
  • Approval Number
  • Test Pressure
19
Q

What are the components of the Facemask? (6)
(Need to know 4 not MC)

A
  • Speech Transmission Diaphragm
  • Exhalation Valve
  • Inner mask
  • Polycarbonate Visor
  • Head Harness & Neck Strap
  • Demand Valve Port
20
Q

When does the Warning Whistle sound?

A

55 BAR +-5 BAR

21
Q

What is the purpose of the silicone inner mask? Not MC

A
  • Reduces CO2 dead-space in mask
  • Prevents fogging/ misting in mask
22
Q

What does carbon monoxide do to haemoglobin?

A

Carbon monoxide has 200 times the affinity to haemoglobin, pushing oxygen off haemoglobin travelling through the blood stream

23
Q

Name the components of a Scott Propak (9)
Word for word, need to know all, not MC

A
  • Harness and backplate
  • Cylinder band and clamp
  • Cylinder connector assembly
  • Pressure reducer
  • Demand valve and supply hose
  • Facemask
  • Pressure gauge and warning whistle
  • Rescue second mask attachment
  • Cylinder
24
Q

What are the 2 types of Compressed Air SCBA?

A

WORK SETS - have a nominal effective life exceeding 15mins

ESCAPE SET - nominal effective duration of less than 15mins

25
Q

What is the purpose of Self Contained Breathing Apparatus (SCBA)?
Needs to be word for word not MC

A

The function of breathing apparatus is to enable the wearer to work in an atmosphere that would not otherwise support life

26
Q

What are the symptoms of carbon monoxide?
Word for word not MC

A

Headache

Unconsciousness

Nausea

Dizziness

27
Q

What is the composition of the air we breathe?

A

Nitrogen = 78.09 before inhalation and 78.09 after exhalation

Oxygen = 20.95 before inhalation and 16.96 after exhalation

Carbon dioxide = 0.04 before inhalation and 4.03 after exhalation

28
Q

What are 4 types of irrespirable atmospheres? (Must be word for word, not MC)

A
  • Oxygen deficient
  • Toxic gases and fumes
  • Elevated temperature
  • Smoke
29
Q

For the BA control board what time is the BA clock set to?

30
Q

What does the chemical splash suit protect the wearer from?
Not MC.

A

The suit protects the wearers skin from being exposed to a harmful substance

31
Q

What is the wearer of a BA chem-suit and splash suit protected from? Not MC

A

The wearer is protected inside the suit from liquids, solids or gaseous contaminants.

32
Q

What is the purpose of establishing an Entry Control Point on perimeter of risk area? Word for word not MC

A
  • Control entry and exit of BA wearers
  • Monitor safety of BA wearers
  • Ensure a response to an emergency involving BA wearers
  • Maintain resources that support BA wearers
33
Q

At what time does a BA wearer remove their tally tag from the BA board?

A

When they leave the warm zone.

34
Q

Can the BA Chemsuit or splash suit be worn by another user at an incident?

35
Q

What happens to a contaminated BA Chemsuit & slash suit after an incident? Not MC word for word.

A

It will be bagged and tagged and transported to the BA section for cleaning and testing. Tag will include firefighters name, number, station, incident number, what the contaminants are, etc.)