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Air NZ Interview > Tech > Flashcards

Tech Flashcards

1
Q

Mcrit

A

Speed at which airflow over the wing becomes sonic

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2
Q

Vortex Generators

A

Re-energise the boundary layer to delay separation

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3
Q

Hot start

A

Too much fuel, not enough air
Engine over-temps

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4
Q

Hung Start

A

Engine fails to reach self-sustaining rpm. Likely due to not enough power from starter
Will likely over-temp when power increased

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5
Q

Wet Start

A

No ignition

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6
Q

Inverter

A

Converts DC to AC

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7
Q

Mach Tuck

A

Centre of pressure moves reward due to shockwave formation.
Nose pitches down

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8
Q

Variable Incidence Tailplane

A

No drag penalty as no trim tab being held deflected
Full elevator deflection remains available

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9
Q

Climb at constant TAS

A

Mach increases

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10
Q

Climb at constant Mach

A

TAS decreases

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11
Q

RAIM Satellite Numbers

A

5 for fault detection
6 for fault detection and exclusion
Barometric aiding reduces both requirements by 1

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12
Q

TCAS

A

Traffic alert and collision avoidance system
TCAS 1: traffic alerts only
TCAS 2: traffic alerts and resolution alerts
Caution area 30-45 seconds
Warning area 25 seconds

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13
Q

Aquaplaning speed formula

A

9 x SQRT (tyre pressure)

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14
Q

Swept wing benefits

A

Higher Mcrit due delayed supersonic flow over wings (reduced acceleration of perpendicular airflow)

Lateral stability

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15
Q

Dangerous Goods Classes

A
  1. Explosives
  2. Gases
  3. Liquids
  4. Solids
  5. Oxidising
  6. Poisons/Toxic
  7. Radioactive
  8. Corrosive
  9. Other
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16
Q

Rectifier Unit

A

Converts AC to DC

17
Q

Transformer

A

Steps AC to a different voltage

18
Q

Machmeter errors

A

Instrument and Pressure
No density error

19
Q

Types of Aquaplaning

A

Dynamic: standing water
Viscous: damp, smooth runway
Reverted Rubber: steam (locked up tyres)

20
Q

EGPWS Modes

A
  1. Excessive descent rate
  2. Excessive terrain closure rate
  3. Altitude loss after take-off
  4. Unsafe terrain clearance (a. Gear b. Flaps c. After takeoff)
  5. Below glide slope
  6. Bank angle
  7. Wind shear protection
  8. Minimums + altitude callouts
21
Q

Diode

A

Controls current flow in one direction

22
Q

Rheostat

A

Controls current flow in circuit

23
Q

Potentiometer

A

Controls voltage in circuit

24
Q

Reasons for spoilers

A
  1. Limitations in aileron size
  2. Reduce risk of aileron reversal
  3. Ailerons lose effectiveness at high speeds (due reversal)
  4. Reduced adverse yaw
  5. Air brakes
  6. Assist lift dumping/braking on landing
25
Q

Supercritical wing

A

Delay the formation of wave drag by delaying formation of upper surface shock wave

26
Q

EPGWS (TAWS) Inputs

A
  1. Radar altimeter
  2. VSI
  3. Glideslope (ILS)
  4. Gear/Flap position
  5. Airspeed
  6. DH setting

Air NZ Interview (10 decks)

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