BA

Question 1

What are the symptoms of heat exhaustion?

Answer 1

Dizziness, lethargy, nausea, abdominal discomfort and/or burning sensation of the skin.

Question 2

What is the function of breathing apparatus?

Answer 2

To enable the wearer to work in an atmosphere that would not otherwise support life.

Question 3

What are the three types of breathing apparatus?

Answer 3

Open circuit demand and positive pressure breathing apparatus.
Filtering equipment - Neg pressure respirators, Pos pressure powered respirators.
Closed Circuit oxygen breathing apparatus.

Question 4

How does Open Circuit Breathing Apparatus work?

Answer 4

Supplies air to the wearer from a static source, mainly a cylinder. Once inhaled and exhaled, the air passes to the atmosphere. This is what ACTFR use.

Question 5

What are the three Cylinder Duration Definitions

Answer 5

Full Definitions, Working Durations, Safety Margin.

Question 6

Define Full Duration

Answer 6

Is the time taken for the pressure in a fully charged cylinder or cylinders to fall to 1Mpa.

Question 7

Define working duration.

Answer 7

Is the time a BA is expected to last from the moment it is started up until the low pressure warning whistle sounds.

Question 8

Define Safety Margin

Answer 8

The time from when the warning whistle sounds until the cylinder is exhausted.

Question 9

How does air get into the blood stream?

Answer 9

Via the aveoli into the blood haemoglobin.

Question 10

At what percentage does carbon dioxide reach to send a signal to the brain to exhale?

Answer 10

4% carbon dioxide

Question 11

What is the composition of the atmosphere before and after exhalation?

Answer 11

Before: nitrogen 78.09%, Oxygen 20.95%, Carbon Dioxide .04%, other gases .92%

After: nitrogen same, Oxygen 17%, Carbon Dioxide 4%, other gases same

Question 12

What are the four types of irrespirable atmosphere?

Answer 12

Oxygen Deficient
Toxic gases and fumes
Smoke
Elevated Temperatures

Question 13

How much more efficient is Carbon Monoxide at combining with the haemoglobin than oxygen?

Answer 13

200 times more efficient

Question 14

What are two ways an oxygen deficient environment is created?

Answer 14

Combustion, which consumes oxygen.
Extinguishing agents, which displace oxygen.

Question 15

What is the difference between a work set and an escape set?

Answer 15

A work set has nominal effective life exceeding 15 minutes.
A escape has a nominal effective life of less than 15 minutes.

Question 16

What are the six components of the face mask?

Answer 16

Speech Transmission Diaphragm
Exhalation Valve
Inner mask
Polycarbonate Visor
Head Harness and Neck Strap
Demand Valve Port

Question 17

What can be done if the demand valve has broken?

Answer 17

The bypass knob can be used to allow air to flow to mask.

Question 18

What is the function of the inner mask?

Answer 18

Reduces CO2 dead space and prevents misting of the visor.

Question 19

In what order do you tighten the facemask?

Answer 19

Bottom, Middle, Top

Question 20

Are what level of Bar will the whistle sound?

Answer 20

55 bar +- 5

Question 21

What does the coloured ring on the cylinder indicate?

Answer 21

Indicates year/month hydrostatic testing was done.

Question 22

What markings will a cylinder have?

Answer 22

Manufactures Mark
Specification Number
Serial Number
Water Capacity
Test Pressure

Question 23

How do you calculate cylinder duration?

Answer 23

(W x B x C) / 40
W = water Capacity
B = Bars
C = Compression Factor .911

Question 24

What does 1 bar equate to?

Answer 24

Regular atmospheric pressure

Question 25

How often is Hydrostatic Stretch Testing done?

Answer 25

Every 5 years in ACTFR

Question 26

At what Bar would you change over a cylinder during pre operational checks?

Answer 26

260 bar

Question 27

How long is the safety margin?

Answer 27

8-10 minutes

Question 28

How long will it take the DSU to be set off by lack of movement?

Answer 28

18 - 23 seconds

Question 29

How many litres of air is there in a cylinder at 300 bar?

Answer 29

1860 Litres

Question 30

When twining, are both cylinders open during use?

Answer 30

Yes

Question 31

If the demand valve hose is damaged, how many litres a minute will leak out?

Answer 31

25 litres per minute

Question 32

What sort of BA system is used by ACTFR?

Answer 32

Open circuit, positive pressure

Question 33

What will the pressure be of the valve the flight mask connects too?

Answer 33

Medium pressure.

Question 34

What are the components of the SCBA Propak?

Answer 34

Harness and Backplate
Cylinder Band and Clamp
Cylinder Connector
Pressure Reducer
Demand Valve and Hose
Face mask
Pressure Gauge and warning whistle
Rescue second mask attachment
Cylinder

Question 35

What is the aim of the primary search?

Answer 35

To conduct a rapid and systematic search of all areas of the structure that the team can search.

Question 36

What is the aim of the secondary search?

Answer 36

Once situation is under control, it confirms possible casualties and helps account for all occupants.

Question 37

What are the six components of the entrapment procedure?

Answer 37

Send radio message to OIC
Activate distress unit or tap
Remain calm and avoid excitement/exertion
If charged branch available, saturate surroundings
Select safest possible place, ideally a wall, pillar or other support.
Remaining calm should reduce usage to 10Lpm
Never remove face mask

Question 38

Define a irrespirable atmosphere.

Answer 38

Is one which cannot safely be breathed.

Question 39

Define a irrespirable atmosphere.

Answer 39

One which cannot safely be breathed.

Question 40

What ACTFR Policy discusses Uniform, PPC, Dress and Deportment?

Answer 40

ACTFR Policy Number OP-11

Question 41

When should a breathing apparatus be worn?

Answer 41

When there is any doubt as to the quality and safety of the working environment.

Question 42

What are the different types of BA Control Equipment?

Answer 42

Tally Tag
Electronic Timer
Stage 1 Control Board
Stage 2 Control Board
Main Control