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Flashcards in Exam Deck (47):
1

Define IMSAFE

Illness
Medication
Stress
Alcohol
Fatigue
Eating

2

Why do aircrew require an annual audiometric exam?

Early detection of NIHL

3

Which drugs are allowed to be used to assist with sleep?

Tamazepam
Zolpidem

4

Sunglasses

CR39 - won't shatter
ND15 - absorb colours

5

Emergency actions for toxic fumes exposure in the aircraft?

100% O2, emergency, connection, breathe normally, declare, descend and land ASAP, ventilate cabin

6

Describe the decibel scale

Modified to reflect the ears response to sound
Logarithmic

7

Define resonance

When a body is vibrated by another being vibrated

8

What is NIHL?

Noise induced hearing loss

9

What is the relationship between pressure and volume

Volume of a gas is inversely proportional to the pressure

10

Why is carbon monoxide so dangerous?

Insidious nature
Incapacitating effects

11

What is the difference between the anatomical blind spot and the night blind spot?

Anatomical: no photoreceptive cells where the optic nerve leaves the eye

Night: centre of fovea has no rods, only cones. Rods have lower light stimulation threshold than cones. Must depend on rods in lower than moon light

12

Describe the two components of the vestibular system used for orientation.

Semicircular canals: 3 fluid filled tubes in the inner ear. Right angles. Angular acceleration.

Otolith organs: small sacs. Inner ear, nerve hair cells. Linear acceleration.

13

Which body cavities may have trapped gas problems during descent

Ears
Sinuses

14

4 main symptoms of motion sickness

Pallor
Cold sweating
Nausea
Vomiting

15

State various types of aircraft oxygen systems.

Gaseous, liquid, solid chemical, onboard generators

16

Define the law of gaseous diffusion

Gas molecules will diffuse through a permeable membrane from an area of high pressure to an area of low pressure

17

State the physical effects of a loss of cabin pressure.

Noise
Decrease temperature
Misting
Decrease visibility
Air blast

18

What is auto kinesis?

Illusory movement by a static light viewed in the dark.

Example of a dot

19

Which sensory organs detect angular acceleration?

Semicircular canals

20

State the safety rules relating to oxygen.

Checks for system integrity
Indications of O2 flow and content
Protection from toxic fumes
Emergency system for high altitude

21

4 types of Hypoxia

Hypoxic
Histotoxic
Hypaenic
Stagnant

22

What mechanisms does the body use to maintain 37 degrees in hot weather?

Thermoregulatory systems:

- vasodilatation
- sweating

23

Exposure time for decibels

85 - 8
Every other halves

24

State the physiological effects of a loss of cabin pressure.

Gas expansion
Hypoxia
DCS
Cold

25

Physiological problems with vibration

Hard tracking of objects
Heart rate fluctuations
Increased muscle activity

26

What is the cause of Permanent Threshold Shift

Destruction of hair cells

27

Sources of vibration

Engines
Turbulence
High speed low level flight
High G

28

What are the four types of decompression illness

Bends- joints
Creeps - skin
Staggers - nervous system
Chokes - respiratory

29

Define Active failures

Errors that have immediate impact

30

State the signs and symptoms of toxic fume exposure.

Symptoms: nausea, vomiting, confusion, disorientation, headache

Odour, eye or throat irritation

31

What drugs can be used to manage fatigue?

Caffeine

32

Define vibration

Oscillation of an objects velocity

33

Who can TMUFF aircrew

Health care provider
Authorising officers
Flight commanders
Individuals

34

What are the components of the shell model?

Software - procedures
Hardware - machine
Environment - situation
Liveware- human

35

What does CREEP stand for?

Container
Restraint
Environment
Energy absorption
Post crash factors and escape

36

State the differences between Rods and Cones.

Rods: night, low illumination, imprecise movement, peripheral retina, monochromatic

Cones: day, high illumination, fine details, colour, central retina

37

Define latent failures

Errors before the incident

38

How is the deoxygenated blood returned to the heart

Venus system -

Cavae - one way valves
Muscular action
Reduced pressure from diaphragm

39

How can aircrew protect, improve and maintain their operational night vision?

Training
Clean screens
Dark adapt
100% O2
Protect from light
Scan
Diet
No smoke

40

The false sensation of pitching is an example of what illusion?

Somatogravic illusion

41

What is Henry's law

The amount of gas dissolved in a solution is directly proportional to the partial pressure of that gas over the solution

42

Which body cavities may have trapped gas problems during ascent

Lungs
Teeth
Gastro-intestinal tract

43

Describe the Coriolanus illusion.

sensation of tumbling. Movement of head from plane of rotation. Conflicting information.

44

State the three sensory organs used for orientation.

Vision
Vestibular system
Proprioceptors

45

Describe the leans.

Semicircular canals, otolith inputs, not detected if slower 2degrees per second per second.

46

List the types of aircraft pressurisation systems.

Low-differential systems
High-differential systems
Air conditioning

47

Which sensory organs detect tilt?

Otolith organs