03. 3. ACGA_L01-L09_2017

Question

1.Efficiency: pg8

Answer 1

a) Ratio between absorbed work and ideally absorbed work for constant maximum reaction Rmax

Answer 2

b) Ratio between absorbed heat and ideally absorbed heat for constant maximum reaction Rmax

Answer 3

c) Work absorbed by the system

Answer 4

d) Heat absorbed by the system

Answer 5

a) Ensure the wheel (rotation plane) is perpendicular to the surface

Answer 6

b) Increase the efficiency of the system

Answer 7

c) Increase the work absorbed by the system

Answer 8

d) Allow aircraft to be almost horizontal when parked or ground maneuvering

Answer 9

A y B true

Answer 10

A y B false

Answer 11

A true B false

Answer 12

A false B true

Answer 13

a) No shimmy up to 1.4vstall

Answer 14

b) Is lateral oscillation of a wheel around its orientation axis

Answer 15

c) Twin wheels increase the shimmy

Answer 16

d) There aren’t any avoiding methods

Answer 17

a) In the wing

Answer 18

b) In the fuselage

Answer 19

c) In nacelles behind the engine

Answer 20

d) All of the above are corrects

Answer 21

a) Single main

Answer 22

b) Bicycle

Answer 23

c) Tricycle

Answer 24

d) Multi-bogey

Answer 25

a) Bungee Cords

Answer 26

b) Spring Steel Leg

Answer 27

c) Torsion bar

Answer 28

d) All of the above are corrects

Answer 29

a) Bungee Cords

Answer 30

b) Spring Steel Leg

Answer 31

c) Torsion bar

Answer 32

d) In none of the above

Answer 33

a) Electrical methods and mechanical methods

Answer 34

b) Fluid power (Hydraulic and pneumatic methods)

Answer 35

c) Magnetic and friction methods

Answer 36

d) A and B are correct

Answer 37

a) Useful for small forces

Answer 38

b) Easy installation

Answer 39

c) Easy control

Answer 40

d) Instantaneous transmission

Answer 41

a) POWER RANGE (power of pneumatic system is more limited)

Answer 42

b) ACTUATION SPEED (hydraulic system is faster)

Answer 43

c) WORKING TEMPERATURE (pneumatics can work at higher temperatures)

Answer 44

d) INSTALLATION COST (compressors are more expensive)

Answer 45

a) The pressure exerted anywhere in a confined compressible fluid is transmitted equally in all directions throughout the fluid such that the pressure ratio (initial difference) remains the same

Answer 46

b) The pressure exerted anywhere in a confined incompressible fluid is transmitted equally in all directions throughout the fluid such that the pressure ratio (initial difference) remains the same

Answer 47

c) The pressure exerted anywhere in a confined compressible fluid is transmitted equally in all directions throughout the fluid such that the pressure ratio (initial difference) remains the same

Answer 48

d) The pressure exerted anywhere in a confined incompressible gas is transmitted unequally in all directions throughout the gas such that the pressure ratio (initial difference) remains the same

Answer 49

a) Transmissor media of the hydraulic pressure and evacuate heat

Answer 50

b) Lubricate moving parts and seal joints and gaps

Answer 51

c) A and B are correct

Answer 52

d) A and B are incorrect

Answer 53

a) Linear actuator

Answer 54

b) Linear selector

Answer 55

c) Rotary selector

Answer 56

d) Spool valve selector

Answer 57

a) Hydraulic Locks

Answer 58

b) Non-return valves (NRV)

Answer 59

c) Pressure Relief Valves (PRV)

Answer 60

d) Pressure Regulators

Answer 61

a) Low viscosity, Ressitance to heat, flammable and good lubricant properties

Answer 62

b) High viscosity, Ressitance to heat, flammable and good lubricant properties

Answer 63

c) High viscosity, Ressitance to heat, Non-flammable and bad lubricant properties

Answer 64

c) High viscosity, Ressitance to heat, Non-flammable and good lubricant properties

Answer 65

a)Trycycle(wheel on te nose)

Answer 66

b)Multi Bugey

Answer 67

c)Quadricycle

Answer 68

d)Tail drabber

Answer 69

a)Weight distribution in the plane

Answer 70

b)Aircraft weight whatever is the gravity centre

Answer 71

c)The ground speed at wich the aircraft lands

Answer 72

d)Only the distance of the track

Answer 73

a)Construction simplicity

Answer 74

b)Low dynamic resistance during the flight

Answer 75

c)Easy management

Answer 76

d)Construction complexity

Answer 77

a)mass, Vertical velocity at touch down and Forward velocity at touch down

Answer 78

b)deceleration when landing, vertical velocity and forward velocity

Answer 79

c)mass, location of the gravity centre and deceleration

Answer 80

d)Only the weight of the aircraft

Answer 81

a)It uses liquids like liquid springs

Answer 82

b)It uses an elastic material that can whitsatnd torsional loading

Answer 83

c) Flexible tube screwed to the aircraft fusselage and it has a very low maintenance

Answer 84

d) Some bungee cord rings or rubber blocks inside a tubular housing connected to the aircraft structure.

Answer 85

a) strong fatigue problems and big size

Answer 86

b) Los temperatures of the liquid

Answer 87

c) Construction simplicity

Answer 88

d) Few fatigue problems and small size

Answer 89

a) Minimun extensión in flight and complex to manufacture

Answer 90

b) Maximum extension in flight and is easy to manufacture

Answer 91

c) Liquid temperatura rises when landing

Answer 92

d) Rebound is imposible with this shock absorber

Answer 93

a) They are very small

Answer 94

b) Temperature change fluid properties and therefore the damping prop and and sock absorbers must be pressurized with the gear extended

Answer 95

c) Sock absorbers must be pressurized without the gear extended

Answer 96

d) They are very fragile

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03. 3. ACGA_L01-L09_2017

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