Depressurisation

Question 1

Estimated time of useful consciousness
43000 feet

Answer 1

10 seconds

Question 2

Estimated time of useful consciousness
40,000 feet

Answer 2

15 seconds

Question 3

Estimated time of useful consciousness
35,000 feet

Answer 3

45 seconds

Question 4

Estimated time of useful consciousness
30,000 feet

Answer 4

1 minute

Question 5

Estimated time of useful consciousness
25,000 feet

Answer 5

3 minutes

Question 6

Estimated time of useful consciousness 20,000 feet

Answer 6

10 minutes

Question 7

What people are more likely to suffer from hypoxia

Answer 7

-heart conditions
-respiratory illness
-cold + fatigue
-blood disorders
-use of alcohol drugs, heavy smokers

Question 8

Early signs of hypoxia

Answer 8

-similar to being intoxicated with alcohol
-reduced night vision

Question 9

Mild signs of hypoxia

Answer 9

Breathlessness, sleepiness, difficulty in concentration, indifference, unwarranted self confidence, increased pulse rate

Question 10

Moderate/severe hypoxia

Answer 10

Blue lips + finger tips (cyanosis)
Euphoric
Unconscious
Impaired vision and memory
Headache
Breathlessness
Erratic
Slowed thinking
Acting drunk
Etc

Question 11

Visible indications of hypoxia

Answer 11

Blue lips and fingertips
Laboured breathing

Question 12

Gas expansion, sites for potential trapped gases include:

Answer 12

Ears
Sinuses
Abdomen/intestines
Teeth

Question 13

How can you relieve gas expansion?

Answer 13

Swallow
Yawn
Suck a sweet
Cry
Blow nose
Hold and exhale gently through nose

Question 14

Symptoms of decompression sickness

Answer 14

Joint pains
Chest pains
Blotchy/marbled skin rash
Visual and mental impairment
Dizziness and confusion
Collapse/unconsciousness

Question 15

Oven fire what does ski stand for

Answer 15

Switch of electrical power supply
Keep door closed
Implement basic fire drill

Question 16

Nearest oxygen mask

Answer 16

Don

Question 17

Nearest seat

Answer 17

Occupy

Question 18

Seatbelt

Answer 18

Fasten

Question 19

Com station

Answer 19

Proceed

Question 20

Follow up duties

Answer 20

Carry out

Question 21

Crew oxygen

Answer 21

Use

Question 22

What is explosive depressurisation

Answer 22

May be caused by a collapse of a door or damaged aircraft structure

Question 23

What is sudden depressurisation

Answer 23

Caused by a failure of pressurisation system which leads to obvious loss of cabin pressure

Question 24

What is gradual depressurisation

Answer 24

A slow pressurisation leak or air conditioning failure

Question 25

What may occur during depressurisation

Answer 25

-initial effects of hypoxia -sudden boiling of liquids -pain in ears and sinuses -mist forming in cabin(not smoke) -air becoming cold and thin -need to breath rapidly -disturbance of dust and loose papers -discomfort or pain due to pressure of gasses trapped in the body

Question 26

Should the aircraft altitude reach an unsafe level the following occurs

Answer 26

Psu masks drop Cabin lighting illuminates No smoking and fasten seatbelts Automatic pa instructing passengers how to use oxygen Flight deck manual oxygen deployment switch is activated as a checklist item

Question 27

What is average adult respiratory rate at cabin altitudes of 5000-8000 feet

Answer 27

16-20 times per min