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UH-72 Lakota - 2022 > AeromednComprehensive test-1 > Flashcards

AeromednComprehensive test-1 Flashcards

1
Q

Self-imposed stressors

A

DEATH: Drugs Exhaustion Alcohol Tobacco Hypoglicemia (diet)

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2
Q

4 types of Hypoxia

A

Hypoxic Hypemic Stagnant Histotoxic

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3
Q

Define Hypoxic hypoxia

A

Insufficient pressure of O2 in the air; e.g. flying at altitude

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4
Q

Four stages of hypoxia

A

Indifferent Compensatory Disturbance Critical

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5
Q

Define Histotoxic hypoxia

A

Interference with the use of O2 by the body tissues; e.g. cyanide poisoning

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6
Q

Define Hypemic hypoxia

A

Reduction in O2 carrying capability of red blood cells; e.g. carbon monoxide

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7
Q

Define Stagnant hypoxia

A

Reduction in blood flow; e.g. positive G maneuvers

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8
Q

Treatment for Spatial disorientation

A

Develop and maintain cross-check Delay intuitive reactions Refer to instrumentsTransfer controls

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9
Q

Somatogravic illusions

A

The leans, Graveyard spin and Coriolis

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10
Q

Most deadly and most unrecoverable Somatogravic illusion

A

Coriolis illusion

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11
Q

Measures to prevent SD include:

A
  1. Never fly without visual reference points 2. Maintain SA 3. Never try to fly both IFR and VRF at the same time 4. Avoid self-imposed stressors (DEATH) 5. Trust your instruments 6. Cockpit management 7. Education/training 8. Instrument profficency 9. Aircraft design
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12
Q

Define Spatial disorientation

A

The inability to determine ones position, attitude and motion relative to the earth or significant objects.

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13
Q

The 3 types of Spatial disorientation

A

Type 1. - Unrecognized Type 2. - Recognized Type 3. - Incapacitating

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14
Q

Most dangerous type of SD

A

Type 1. - unrecognized

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15
Q

Which of the 5 senses is the most important to maintain equilibrium and orientation?

A

Vision

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16
Q

Semicircular canals sense changes in _______ acceleration and react to any changes in ______, ________ and ______ attitude

A

Angular Yaw Roll Pitch

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17
Q

A smoker at sea level is actually at altitude:

A

5000 ft.

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18
Q

At 18.000 ft., the usefull time of consciousness is:

A

20-30 mins

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19
Q

Define Fatigue

A

The state of feeling tired, weary, or sleepy that results from periods of anxiety, exposure, to harsh environment, or loss of sleep.

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20
Q

The 3 types of fatigue

A
  1. Acute 2. Chronic 3. Burnout
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21
Q

Describe chronic fatigue

A

Being mentally and physically tiered over a long period of time.

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22
Q

The 3 characteristics associated with chronic fatigue

A

Depressed mood Irritability poor judgement

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23
Q

The only significant effect of hypxia in the indifferent stage is ______ and_______ and it occurs at what altitude?

A

Acuity Color perception SL-10.000 ft.

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24
Q

Which type of hypoxia does smoking cause?

A

Hypemic hypoxia

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25
Prevention methods for hypoxic hypoxia
1. Limit time at altitude 2. Pressurzed cabin 3. minimize self-imposed stressors 4. 100% O2
26
Define hypoxia
State of oxygen deficiency in the blood cells and tissues sufficient to cause impairment of function.
27
Define tranlating tendency
The tendency of a single rotor helicopter with a counterclockwise rotating rotor system to drift laterally to the right while at a hover
28
What causes Translating tendency
Thrust produced by the tail rotor to compensate for main rotor torque.
29
Translating tendency compensation
1. Rigging of the flight control system2. Tilting of the mast3. Stabilization augmentation systems4. Left cyclic input by the pilot
30
Define Dissymmetry of lift
Unequal lift between advancing and retreating halves of the rotor disk caused by the different wind flow velocity across each half
31
Relative wind velocity of advancing blade is blade speed ____ airspeed
Plus
32
Relative wind velocity of retreating blade is blade speed ____ airspeed
Minus
33
Main rotor method to overcome dissymmetry of lift
Flapping
34
When blade flapping has compensated for dissymmetry of lift, the rotor disk is tilted to the rear is called?
Blowback
35
What can the pilot do to compensate for dissymmetry of lift?
Cyclic feathering
36
Effective tranlational lift (ETL) definition
The Rotor dick outruns the recirculation of old vortices and begins to work in relatively undisturbed air
37
Airspeed for ETL
16-24 kts
38
ETL causes relative wind to become more horizontal, resulting in:
1. More vertical lift component 2. Less induced drag 3. Increased angle of attack
39
Define Settling with power
A condition of powered flight in which the helicopter settles in it's own downwash
40
What conditions must exist simultaneously for sttling with power to occur
1. Vertical or near vertical descent rate of at least 300 ft/min depending upon: - Gross weight- Rotor RPM- Density altitude 2. 20% - 100% of available engine power with insufficient power remaining to arrest the descent 3. Sow forward airspeed, less than ETL
41
Settling with power recovery
Increase airspeed with forward cyclicReduce collective pitch as altitude permits
42
Define Dynamic rollover
A helicopters susceptibility to a lateral rolling tendency
43
Dynamic rollover conditions
Pivot pointRolling motionExceed critical angle
44
Physical factors for dynamic rollover
- Main rotor thrust - CG - Tail rotor thrust - Crosswind component - Ground surface - Sloped landing area - Low fuel condition
45
Human factors
- Inattention - Inexperience - Inappropriate control input - Failure to take timely corrective action - Loss of visual reference
46
Recovery of dynamic rollover
A smooth moderate collective reduction
47
Primary factor for retreating blade stall
Excessive airspeed
48
Contributing factors for retreating blade stall
1. High gross weight 2. High DA3. High "G" maneuvers 4. Low rotor RPM5. Turbulence
49
Symptoms of retreating blade stall
1. Abnormal vibrations 2. Pitch-up of nose 3. Tendency to roll toward the stalled (left) side 4. Loss of control (if corrective action is not applied)
50
Corrective actions for retreating blade stall
1. Reduce collective pitch 2. Regain aircraft control 3. Reduce airspeed 4. Increase rotor RPM to normal operating range 5. Minimize maneuvering 6. Descent to a lower altitude.
51
Explain why hovering OGE requires more power than hovering IGE
Induced flow velocity is increased, causing a decrease in AOA. A higher blade pitch angle is required to maintain the same AOA as in IGE hover. The increased pitch angle also creates more drag. More power to hover OGE than IGE is required by this increased pitch angle and drag
52
Weight and balance requirements:
The PC will ensure— (1) The accuracy of computations on the DD Form 365–4 (Weight and Balance Clearance Form F–Transport/ Tactical). (2) That a completed DD Form 365–4 is aboard the aircraft to verify that the weight and center-of-gravity will remain within allowable limits for the entire flight. Several DD Forms 365–4 completed for other loadings also may be used to satisfy this requirement. In this case, the actual loading being verified must clearly be within the extremes of the loading shown on the DD Forms 365–4 used for verification.
53
What are the oxygen requirements in: 10.000 - 12.000 ft? 12.000 - 14.000 ft? +14.000 ft?
1 hour without extra oxygen 30 minutes without extra oxygen Oxygen required
54
For how long can you fly over a layer of fog?
30 minutes
55
Destination weather must be above minima for _____ after ETA
ETA + 1 hr
56
Weather forecast void time:
1 hour 30 min
57
True course definition
Measured from true north clockwise to the proposed path.
58
Magnetic Heading definition
Measured clockwise to magnetic north nose of aircraft to proposed course
59
DD 175-1 is what?
flight weather briefing
60
DD 175 is what?
Flight plan
61
What is DVFR? And when should you state DVFR on your flight plan?
When crossing the air defense identification zone
62
To be current in an aircraft you have to fly at least every:
60 days
63
Weight and balance must be recomputed every ____ day, but for FT Rucker it is every _____ day
90 , 365

UH-72 Lakota - 2022 (42 decks)

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