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MOD 1 > Exam Question > Flashcards

Exam Question Flashcards

1
Q

What are the things evaluated in the ACGC forum? (5)

A 
Thermal loading
Weight and balance
Space configuration
Antenna location
EMI EMC
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2
Q

For hazard that is categorized as potentially causing total loss of a manned aircraft with a probability occurrence as improbable i.e. probability of occurrence lower than 1, what is the mishap risk cat, and who should be the technical endorsement authority, and the RSAF mishap risk acceptance authority respectively?

A

Medium risk
Technical authority: APWG
RSAF risk Acceptance authority: HAEL & HAO

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3
Q

What are the things that are evaluated at APWG? (3) [wrong answer]

A

EQT
EMI EMC
Structural strength of the modification

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4
Q

How is a mach cone/wave being formed?

A

When the object travels greater than mach 1

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5
Q

How does the control of rotary wing works?

A 
Longitudinal - Cyclic Stick
Lateral - Cyclic Stick
Vertical - Collective Lever
Pitch - Cyclic Stick
Roll - Cyclic Stick
Yaw - Pedals
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6
Q

What are the factors affecting the lift of the wing? (4) [All of the above]

A

angle of attack on the airfoil
wing area
velocity
geometry of airfoil

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7
Q

which control input changes the main rotor blade pitch angle for a conventional helicopter?

A

Collective lever and cyclic stick

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8
Q

What is the main surface affecting the yaw control?

A

Rudder

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9
Q

why do blade need to be twisted?

A

Blade twist is introduced on the main rotor to avoid load variation from root to tip

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10
Q

Where to add the ballast if you want to move the CG of aircraft forward

A

Foward

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11
Q

What are the loads experienced on aircraft in flight? (5)

A 
Bending
Compression
Tension
Torsion
Shear
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12
Q

What is the direction of a spar in wing?

A

In board to out board

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13
Q

What are the primary surfaces of an aircraft structure?

A

Longeron
Bulkhead
Frame
Spars

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14
Q

What are the types of fuselage construction?

A

Semi-monocoque and monocoque

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15
Q

What are disbonds?

A

An area within a bonded interface between two adherents in which an adhesion failure or separation has occurred. [loss of adhesive]

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16
Q

For consistent results to be obtain for aircraft weighing, how is it placed?

A

Placed in rigged position and clean aircraft

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17
Q

Main purpose of a hydraulic system?

A

Act as a force multiplier to actuate the control surface

18
Q

What are the alternate methods to extend the landing gear? (4) (all of the above)

A

Pneumatic extension of LG
Mechanical crank or ratchet system
Mechanical release of Up Locks
Separate hydraulic system power

19
Q

What type of structures are wing spars and longerons?

A

Primary structure

20
Q

What does Titanium 6Al-4V means?

A

6% Aluminium
4% vanadium
Balanced Titanium

21
Q

What is eddy current inspection?

A

Used for surface and near surface
Rough surface*
Non ferrous metal & ferrous metal
Contact of probe is necessary

22
Q

What are the Primary FCS for Fixed-Wing A/C?

A

Pitch - Elevators / Canards
Roll - Ailerons / Flaps
Yaw – Rudder

23
Q

What is the most common material used for f15 airframe?

A 
50% aluminium
34% titanium
8% steel
2% composite
6% others
24
Q

When does temporary repair need to be completed?

A

At the earliest opportunity

25
Q

How is the Life preserver unit inflated?

A

Designed to keep the wearer afloat subsequent to immersion in water
Inflation by CO2 cylinder or oral inflation valve

26
Q

What does cabin pressurisation involve?

A

Sealing the cabin
Supplying air to the cabin
Controlling cabin pressure by regulating the outflow of air
Ensuring the safety, efficiency and comfort of the aircrew

27
Q

What are the heat loads that must be accounted for when designing the air-con system of aircraft? (do not need to account the heat load for engine)

A
  • Ambient conditions outside aircraft
  • Rate of heat release from equipment in the cabin
  • Rate of heat release from the crew in cabin
  • Heat input into aircraft structure resulting from kinetic heating
  • NOT meant to supply cold air to cool the engine exhaust bay
28
Q

In an anti G system, when does the valve open?

A

Automatic and dependent of the G load

29
Q

What is not part of the pressure fuel system?

A

fuel quantity guage does it make up as a component? yes
will cabin regulator make up as a component? No
pressure relief valve? yes

30
Q

what is the function of the flight control system?

A

gives input assistance for the pilot to overcome the enormous aerodynamic forces acting on the flight control surfaces.

31
Q

What are the process that makes up the brayton cycle?

A

isobaric

isentropic

32
Q

To produce optimum thrust, what is the blade angle?

A

3 to 4 deg

33
Q

What is not the method to reduce blade vibration?

A

Putting engine side by side to cancel out the vibration

Frequency Control: Redesign to move the resonance frequency out of the engine’s operating range
Response Control: Introduce damping
Structural Control: Material change to improve vibratory capability

34
Q

What is true about gas turbine engine inlet?

A

The purpose of the inlet is to deliver free-stream air to the face of the engine at conditions acceptable to the engine and with a minimum loss of the stagnation pressure available in the free stream.

Noise attenuation
Radar attenuation (stealth)
Nozzle secondary airflow
Dust / Sand Particle Separation
Airflow bypass to assist in engine starting
35
Q

Which stroke when it reaches top dead when the valve is open?

A

End of Exhaust stroke

36
Q

What is the purpose of shroud at the tip of the blade?

A

To minimise tip loss and provide a damper for vibrations

37
Q

When can approval be sort through staff channel out of modification committee?

A

Flight critical
Safety related
Urgent due to operational requirements

38
Q

What are the modifications that require mod leaflet?

A

Aircraft and Weapon System modification
Trial modification
Preferred part from OEM that requires aircraft modification and are introduced on a fleet-wide basis

39
Q

LTO is approved by who?

A

Comd AELG / CO 80X / CO 81X / CO 50X

40
Q

What is the definition of STI?

A

Special technical instruction for one time maintenance work (non recurring)
Same part number

MOD 1 (12 decks)

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