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03. 3. ACGA_L01-L09_2017

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AVIÓNICA Quiz on 03. 3. ACGA_L01-L09_2017, created by Ismael Vázquez on 28/03/2018.
Ismael Vázquez
Quiz by Ismael Vázquez, updated more than 1 year ago
Ismael Vázquez
Created by Ismael Vázquez about 6 years ago
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Resource summary

Question 1

Question
1.Efficiency: pg8
Answer
  • 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

Question 2

Question
2.What is the function of the torque link? pg8
Answer
  • 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

Question 3

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

Question 4

Question
4. What is true about shimmy?
Answer
  • 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

Question 5

Question
5. Where can you keep a retractable gear? pg8
Answer
  • a) In the wing
  • b) In the fuselage
  • c) In nacelles behind the engine
  • d) All of the above are corrects

Question 6

Question
6. What kind of wheels arrangement are usually used in transport aircrafts? pg9
Answer
  • a) Single main
  • b) Bicycle
  • c) Tricycle
  • d) Multi-bogey

Question 7

Question
7. What kind of damping systems are used in aircraft?
Answer
  • a) Bungee Cords
  • b) Spring Steel Leg
  • c) Torsion bar
  • d) All of the above are corrects

Question 8

Question
8. In what kind of damping system the bar absorbs the loading and the energy is dissipated into the fuselage? pg9
Answer
  • a) Bungee Cords
  • b) Spring Steel Leg
  • c) Torsion bar
  • d) In none of the above

Question 9

Question
1. Which methods to transmit power are used on aircrafts? pg10
Answer
  • a) Electrical methods and mechanical methods
  • b) Fluid power (Hydraulic and pneumatic methods)
  • c) Magnetic and friction methods
  • d) A and B are correct

Question 10

Question
2. Which one IS NOT an ADVANTAGE of hydraulic systems? pg10
Answer
  • a) Useful for small forces
  • b) Easy installation
  • c) Easy control
  • d) Instantaneous transmission

Question 11

Question
3. Hydraulic VS Pneumatic Systems. Which one is INCORRECT?
Answer
  • 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)

Question 12

Question
4. Pascal ́s Law says:
Answer
  • 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

Question 13

Question
5. Which are the missions of Hydraulic Fluids?
Answer
  • 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

Question 14

Question
6. ........................ convert fluid pressure into linear motion pg10
Answer
  • a) Linear actuator
  • b) Linear selector
  • c) Rotary selector
  • d) Spool valve selector

Question 15

Question
7. Which flow control device prevents backflow?
Answer
  • a) Hydraulic Locks
  • b) Non-return valves (NRV)
  • c) Pressure Relief Valves (PRV)
  • d) Pressure Regulators

Question 16

Question
8. Which are desired properties of Hydraulic Fluids? pg11
Answer
  • 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

Question 17

Question
1.- Which of the next gear configurations is more stable when the aircraft is turning?
Answer
  • a)Trycycle(wheel on te nose)
  • b)Multi Bugey
  • c)Quadricycle
  • d)Tail drabber

Question 18

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

Question 19

Question
3.-Cuál es una de las ventajas del tren fijo? pg11
Answer
  • a)Construction simplicity
  • b)Low dynamic resistance during the flight
  • c)Easy management
  • d)Construction complexity

Question 20

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

Question 21

Question
5.-How is a Spring Steel Leg ?
Answer
  • 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.

Question 22

Question
6.-Advantages of the liquid springs? pg12
Answer
  • a) strong fatigue problems and big size
  • b) Los temperatures of the liquid
  • c) Construction simplicity
  • d) Few fatigue problems and small size

Question 23

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

Question 24

Question
8.-Some disadvantages of the liquid springs are:
Answer
  • 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
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