Ismael Vázquez
Quiz por , criado more than 1 year ago

AVIÓNICA Quiz sobre 03. 3. ACGA_L01-L09_2017, criado por Ismael Vázquez em 28-03-2018.

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Ismael Vázquez
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03. 3. ACGA_L01-L09_2017

Questão 1 de 24

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1.Efficiency:
pg8

Selecione uma das seguintes:

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

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

  • c) Work absorbed by the system

  • d) Heat absorbed by the system

Explicação

Questão 2 de 24

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2.What is the function of the torque link?
pg8

Selecione uma das seguintes:

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

  • b) Increase the efficiency of the system

  • c) Increase the work absorbed by the system

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

Explicação

Questão 3 de 24

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3. Nose wheels:
A- Makes the fuselage follows the nose
B- Allow aircraft to be almost horizontal when parked or ground maneuvering

Selecione uma das seguintes:

  • A y B true

  • A y B false

  • A true B false

  • A false B true

Explicação

Questão 4 de 24

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4. What is true about shimmy?

Selecione uma das seguintes:

  • a) No shimmy up to 1.4vstall

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

  • c) Twin wheels increase the shimmy

  • d) There aren’t any avoiding methods

Explicação

Questão 5 de 24

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5. Where can you keep a retractable gear?
pg8

Selecione uma das seguintes:

  • a) In the wing

  • b) In the fuselage

  • c) In nacelles behind the engine

  • d) All of the above are corrects

Explicação

Questão 6 de 24

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6. What kind of wheels arrangement are usually used in transport aircrafts?
pg9

Selecione uma das seguintes:

  • a) Single main

  • b) Bicycle

  • c) Tricycle

  • d) Multi-bogey

Explicação

Questão 7 de 24

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7. What kind of damping systems are used in aircraft?

Selecione uma das seguintes:

  • a) Bungee Cords

  • b) Spring Steel Leg

  • c) Torsion bar

  • d) All of the above are corrects

Explicação

Questão 8 de 24

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8. In what kind of damping system the bar absorbs the loading and the energy is dissipated into the fuselage?
pg9

Selecione uma das seguintes:

  • a) Bungee Cords

  • b) Spring Steel Leg

  • c) Torsion bar

  • d) In none of the above

Explicação

Questão 9 de 24

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1. Which methods to transmit power are used on aircrafts?
pg10

Selecione uma das seguintes:

  • a) Electrical methods and mechanical methods

  • b) Fluid power (Hydraulic and pneumatic methods)

  • c) Magnetic and friction methods

  • d) A and B are correct

Explicação

Questão 10 de 24

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2. Which one IS NOT an ADVANTAGE of hydraulic systems?
pg10

Selecione uma das seguintes:

  • a) Useful for small forces

  • b) Easy installation

  • c) Easy control

  • d) Instantaneous transmission

Explicação

Questão 11 de 24

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3. Hydraulic VS Pneumatic Systems. Which one is INCORRECT?

Selecione uma das seguintes:

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

  • b) ACTUATION SPEED (hydraulic system is faster)

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

  • d) INSTALLATION COST (compressors are more expensive)

Explicação

Questão 12 de 24

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4. Pascal ́s Law says:

Selecione uma das seguintes:

  • 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

  • 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

  • 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

  • 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

Explicação

Questão 13 de 24

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5. Which are the missions of Hydraulic Fluids?

Selecione uma das seguintes:

  • a) Transmissor media of the hydraulic pressure and evacuate heat

  • b) Lubricate moving parts and seal joints and gaps

  • c) A and B are correct

  • d) A and B are incorrect

Explicação

Questão 14 de 24

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6. ........................ convert fluid pressure into linear motion
pg10

Selecione uma das seguintes:

  • a) Linear actuator

  • b) Linear selector

  • c) Rotary selector

  • d) Spool valve selector

Explicação

Questão 15 de 24

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7. Which flow control device prevents backflow?

Selecione uma das seguintes:

  • a) Hydraulic Locks

  • b) Non-return valves (NRV)

  • c) Pressure Relief Valves (PRV)

  • d) Pressure Regulators

Explicação

Questão 16 de 24

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8. Which are desired properties of Hydraulic Fluids?
pg11

Selecione uma das seguintes:

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

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

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

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

Explicação

Questão 17 de 24

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1.- Which of the next gear configurations is more stable when the aircraft is turning?

Selecione uma das seguintes:

  • a)Trycycle(wheel on te nose)

  • b)Multi Bugey

  • c)Quadricycle

  • d)Tail drabber

Explicação

Questão 18 de 24

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2.-What do you have to take into account in order to design the base of the gear?

Selecione uma das seguintes:

  • a)Weight distribution in the plane

  • b)Aircraft weight whatever is the gravity centre

  • c)The ground speed at wich the aircraft lands

  • d)Only the distance of the track

Explicação

Questão 19 de 24

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3.-Cuál es una de las ventajas del tren fijo?
pg11

Selecione uma das seguintes:

  • a)Construction simplicity

  • b)Low dynamic resistance during the flight

  • c)Easy management

  • d)Construction complexity

Explicação

Questão 20 de 24

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4.-¿Wich are the most important factors in order to desing the gear when landing?
pg12

Selecione uma das seguintes:

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

  • b)deceleration when landing, vertical velocity and forward velocity

  • c)mass, location of the gravity centre and deceleration

  • d)Only the weight of the aircraft

Explicação

Questão 21 de 24

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5.-How is a Spring Steel Leg ?

Selecione uma das seguintes:

  • a)It uses liquids like liquid springs

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

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

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

Explicação

Questão 22 de 24

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6.-Advantages of the liquid springs?
pg12

Selecione uma das seguintes:

  • a) strong fatigue problems and big size

  • b) Los temperatures of the liquid

  • c) Construction simplicity

  • d) Few fatigue problems and small size

Explicação

Questão 23 de 24

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7.- The oleo-pneumatic shock absorbers, with unseparated oleos give us:
pg12

Selecione uma das seguintes:

  • a) Minimun extensión in flight and complex to manufacture

  • b) Maximum extension in flight and is easy to manufacture

  • c) Liquid temperatura rises when landing

  • d) Rebound is imposible with this shock absorber

Explicação

Questão 24 de 24

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8.-Some disadvantages of the liquid springs are:

Selecione uma das seguintes:

  • a) They are very small

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

  • c) Sock absorbers must be pressurized without the gear extended

  • d) They are very fragile

Explicação