Human Factors Flashcards

1
Q

What does retina have? And what do they do?

A

Cones and rods

Cons - bright light

Rods - night vision

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2
Q

What us rhe technique to see objects clearky wt night

A

Look 5-10 degrees off of their centre

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3
Q

How long for eyes to adapt to the dark?

A

30 mins

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4
Q

What is autokinesis

A

If you look at a single point of light for a while, it can appear to move

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5
Q

What is false horizon

A

Occurs when natural horizon is obscured

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6
Q

What kind of approach will narrow, wide and snow coveredrunway produce?

A

Narrow - lower approach

Wide - higher approach

Snow covered - lower approach

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7
Q

What effect does fog have on pitch

A

Can cause illusiion of pitching up

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8
Q

What is flicker vertigo and what does it cause and how to prevent?

A

Happens due to flashing lights

Nausea or unconsciousness

Avoid looking at light source through propellor

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9
Q

What is vestibular disorientation

A

When vestibular system sends misleading signals to brain

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10
Q

What is coriolis illusion

A

When during turn, you turn head too much

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11
Q

What is graveyard spiral

A

Loss of altitude in turn can give imprsssion of level descent thus wanting to tighten the turn

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12
Q

What is leans

A

Abrupt recovery from a bank makes your brain think that it banked in other direction

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13
Q

What is somatogravic illusion

A

Rapid acceleration can produce climb effect in brain

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14
Q

What is inversion illusion

A

Abrupt change from climb to straight forward can cause backward tumbling effect

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15
Q

What is oxygen attached to in your body?

A

Hemoglobin

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16
Q

What is Hypoxia

A

It is when tissues in the body don’t recieve enough oxygen

17
Q

What are the types of hypoxia

A

Hypoxic, hypemic, stagnant and histotoxic

18
Q

When does hypoxic hypoxia occur?

A

Decrease of oxygen molecules at sufficient pressure

Can be fast in rapid decompression at high altitude

Can be fast in at low altitudes

19
Q

What is time or useful consciousness

A

Time you have at any given altitude following an oxygen loss

20
Q

What is hypemic hypoxia

A

When your blood is not able to carry sufficient oxygen

Can happen due to different diseases

21
Q

What is the most common type of hypemic hypoxia

A

Carbon monoxide poisoning

22
Q

What is stagnant hypoxia

A

When body fails to circulate blood effectively

Maybe due to heart attack or excess G force

23
Q

Histotoxic Hypoxia

A

Inability of cells to use oxygen

Can be caused due to narcotics

24
Q

What part is for oxygen in FAR

A

91.211

25
Q

What are oxygen requirements at different altitudes

A

Till 12500 - no requirement

12,500 - 14,000 - oxygen for flt time more than 30 mins at this altitude

14,000 - 15,000 - oxygen for all crew members

Above 15,000 - oxygen for all occupants

26
Q

Types of oxygen masks

A

Continuous flow, demand and pressure demand

27
Q

What kind of oxygen to be used

A

Aviator’s breathing oxygen

28
Q

When dies hyperventilations occur?

A

When breathing rate increases too much

29
Q

Common symptoms of hyperventilation

A

Headache, euphoria, drowsiness

30
Q

What tube in ear to equalise pressure

A

Eustachian tube

31
Q

What is valsalva maneuvrr

A

Pinching nose and let aie out forcibly

32
Q

What are bends

A

Nitrogen forms bubbles in the tissues and blood

33
Q

Recommended waiting time and for what altitude

A

8000 ft 24 hrs

12 hrs if non controlled

34
Q

What is Alcohol blood content and wait time

A

0.04% 8hrs