Quiz
03. 3. ACGA_L01-L09_2017
Questions in this quiz (24)
11.Efficiency:
pg8- Aa) Ratio between absorbed work and ideally absorbed work for constant maximum reaction
Rmax - Bb) Ratio between absorbed heat and ideally absorbed heat for constant maximum reaction Rmax
- Cc) Work absorbed by the system
- Dd) Heat absorbed by the system
- Aa) Ratio between absorbed work and ideally absorbed work for constant maximum reaction
22.What is the function of the torque link?
pg8- Aa) Ensure the wheel (rotation plane) is perpendicular to the surface
- Bb) Increase the efficiency of the system
- Cc) Increase the work absorbed by the system
- Dd) Allow aircraft to be almost horizontal when parked or ground maneuvering
33. Nose wheels:
A- Makes the fuselage follows the nose
B- Allow aircraft to be almost horizontal when parked or ground maneuvering- AA y B true
- BA y B false
- CA true B false
- DA false B true
44. What is true about shimmy?
- Aa) No shimmy up to 1.4vstall
- Bb) Is lateral oscillation of a wheel around its orientation axis
- Cc) Twin wheels increase the shimmy
- Dd) There aren’t any avoiding methods
55. Where can you keep a retractable gear?
pg8- Aa) In the wing
- Bb) In the fuselage
- Cc) In nacelles behind the engine
- Dd) All of the above are corrects
66. What kind of wheels arrangement are usually used in transport aircrafts?
pg9- Aa) Single main
- Bb) Bicycle
- Cc) Tricycle
- Dd) Multi-bogey
77. What kind of damping systems are used in aircraft?
- Aa) Bungee Cords
- Bb) Spring Steel Leg
- Cc) Torsion bar
- Dd) All of the above are corrects
88. In what kind of damping system the bar absorbs the loading and the energy is dissipated into the fuselage?
pg9- Aa) Bungee Cords
- Bb) Spring Steel Leg
- Cc) Torsion bar
- Dd) In none of the above
91. Which methods to transmit power are used on aircrafts?
pg10- Aa) Electrical methods and mechanical methods
- Bb) Fluid power (Hydraulic and pneumatic methods)
- Cc) Magnetic and friction methods
- Dd) A and B are correct
102. Which one IS NOT an ADVANTAGE of hydraulic systems?
pg10- Aa) Useful for small forces
- Bb) Easy installation
- Cc) Easy control
- Dd) Instantaneous transmission
113. Hydraulic VS Pneumatic Systems. Which one is INCORRECT?
- Aa) POWER RANGE (power of pneumatic system is more limited)
- Bb) ACTUATION SPEED (hydraulic system is faster)
- Cc) WORKING TEMPERATURE (pneumatics can work at higher temperatures)
- Dd) INSTALLATION COST (compressors are more expensive)
124. Pascal ́s Law says:
- Aa) 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
- Bb) 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 - Cc) 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
- Dd) 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
135. Which are the missions of Hydraulic Fluids?
- Aa) Transmissor media of the hydraulic pressure and evacuate heat
- Bb) Lubricate moving parts and seal joints and gaps
- Cc) A and B are correct
- Dd) A and B are incorrect
146. ........................ convert fluid pressure into linear motion
pg10- Aa) Linear actuator
- Bb) Linear selector
- Cc) Rotary selector
- Dd) Spool valve selector
157. Which flow control device prevents backflow?
- Aa) Hydraulic Locks
- Bb) Non-return valves (NRV)
- Cc) Pressure Relief Valves (PRV)
- Dd) Pressure Regulators
168. Which are desired properties of Hydraulic Fluids?
pg11- Aa) Low viscosity, Ressitance to heat, flammable and good lubricant properties
- Bb) High viscosity, Ressitance to heat, flammable and good lubricant properties
- Cc) High viscosity, Ressitance to heat, Non-flammable and bad lubricant properties
- Dc) High viscosity, Ressitance to heat, Non-flammable and good lubricant properties
171.- Which of the next gear configurations is more stable when the aircraft is turning?
- Aa)Trycycle(wheel on te nose)
- Bb)Multi Bugey
- Cc)Quadricycle
- Dd)Tail drabber
182.-What do you have to take into account in order to design the base of the gear?
- Aa)Weight distribution in the plane
- Bb)Aircraft weight whatever is the gravity centre
- Cc)The ground speed at wich the aircraft lands
- Dd)Only the distance of the track
193.-Cuál es una de las ventajas del tren fijo?
pg11- Aa)Construction simplicity
- Bb)Low dynamic resistance during the flight
- Cc)Easy management
- Dd)Construction complexity
204.-¿Wich are the most important factors in order to desing the gear when landing?
pg12- Aa)mass, Vertical velocity at touch down and Forward velocity at touch down
- Bb)deceleration when landing, vertical velocity and forward velocity
- Cc)mass, location of the gravity centre and deceleration
- Dd)Only the weight of the aircraft
215.-How is a Spring Steel Leg ?
- Aa)It uses liquids like liquid springs
- Bb)It uses an elastic material that can whitsatnd torsional loading
- Cc) Flexible tube screwed to the aircraft fusselage and it has a very low maintenance
- Dd) Some bungee cord rings or rubber blocks inside a tubular housing connected to the aircraft structure.
226.-Advantages of the liquid springs?
pg12- Aa) strong fatigue problems and big size
- Bb) Los temperatures of the liquid
- Cc) Construction simplicity
- Dd) Few fatigue problems and small size
237.- The oleo-pneumatic shock absorbers, with unseparated oleos give us:
pg12- Aa) Minimun extensión in flight and complex to manufacture
- Bb) Maximum extension in flight and is easy to manufacture
- Cc) Liquid temperatura rises when landing
- Dd) Rebound is imposible with this shock absorber
248.-Some disadvantages of the liquid springs are:
- Aa) They are very small
- Bb) Temperature change fluid properties and therefore the damping prop and and sock absorbers must be pressurized with the gear extended
- Cc) Sock absorbers must be pressurized without the gear extended
- Dd) They are very fragile
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- AVIÓNICA Quiz on 03. 3. ACGA_L01-L09_2017, created by Ismael Vázquez on 28/03/2018.
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- Ismael Vázquez
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