Which is not an anti-ice system?
A. Hot bleed air
B. Strong movements of the rudder
C. Electrical heating
D. Liquid ice protection
Which are the de-icing types?
A. Evaporative, wets and cyclic
B. Movements and heat
C. Evaporative and drys
D. Only cyclic
Who is the last responsible for having the wings free of ice?
A. Flight engineer
B. Pilot in command
C. Air hostesses
D. De-icing Ground Crew
Pneumatic de-icing boots are:
A. A shaped rubber sleeve that conforms to leading edge which is attached.
B. A shaped rubber sleeve that is attached to the leading edge of propellers
C. Devices which can optimize aerodynamic efficiency
D. Devices which its interior is full of glycol
. Which is the main difference between an anti-ice and a de-ice system?
A. There is not any difference
B. De-ice system does not exist.
C. The anti ice system allow ice accretion and when is activated shed the ice or melt the ice, while a de-ice system prevent ice accretion
D. The anti-ice prevent ice accretion while the de-ice eliminates the ice
Which of this statements about the pitot heat is true?
A. The pitot heat is not an esential system in commercial aviation
B. The pitot heat prevents and eliminates the ice accretion does not matter the ambiential conditions
C. Pitot heat is usually part of the anti-ice system in the aircraft
D. Pitot heat usually consists in a electrical resistor.
. How many types of de-icing systems exist?
A. Three: wets, cyclic and regressive.
B. Four: evaporate, cyclic, kinetic and regressive.
C. Three: evaporative, wets and cyclic.
D. Four: wets, cyclic, kinetic and evaporative.
.Which of the following is a type of windshield de-icing?
A. Fluid de-icing
B. Electrical anti-icing
C. Pneumatic System
D. All of them are correct
Advantages of hydraulic system
A. Ability to obtain large forces
B. Force amplification
C. Accurate control
D. All above are right
Disadvantages of hydraulic system
A. Not useful for small forces
B. Temperature range limited
C. Expensive components
Definition of hydraulics
A. Science that studies the equilibrium (Hydrostatic) and dynamics of liquids (Hydrodynamics).
B. Science that studies the possibility of using air in systems.
C. Science that studies the forces involved when an aircraft flies
D. Science that studies how the environment changes when an aircraft flies throughout it.
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. This is the definition of:
A. Newton´s Law
B. Pascal´s Law
C. Bernouigi´s Law
D. Mach´s Law
The F18´s operating pressure is:
A. 3000 psi
B. 4000 psi
C. 2000 psi
D. 1450 psi
Which of the following is not a type of pump?
A. Hand pump
B. Electrically operated pump
C. Engine-driven pump
D. Stealth pump
. Choose the wrong answer: functions of hydraulic accumulators
A. Store energy (high pressure fluid)
B. Provide fluid/pressure in case of emergency/failure of pump
C. Avoid thermal expansion of the fluid
D. Cater for small internal leaks
RAM Air Turbine
A. Is the third turbine you can find in a 727 or DC10
B. Add extra propulsion to the plane if the main engines fail
C. Provides electrical and mechanical power if main resources fail
D. Are specially common in jet fighters and not used in civil airliners
RAM turbines are:
A. To provide electrical and mechanical power if main sources fail
B. Installed inside the engines
C. Useless
D. A kind of turbine engine
Seals:
A. Prevent fluid passing a certain point
B. Keep air and dirt out of the system
C. Both of the above
D. None of the above
Compared to pneumatic systems:
A. Hydraulic control is easier as there are no compressibility effects.
B. Hydraulic systems work continuously, being noisier.
C. Compressors are usually more expensive than pumps.
D. All of the above
. Hydraulic fluids can be:
A. Vegetable-Based
B. Mineral-based
C. Synthetic-based
Electrically operated pumps operate at a pressure of:
A. 2000 – 4500 psi
B. 3050 – 3600 psi
C. 1000 – 2850 psi
D. 2850 – 3050 psi
In closed hydraulic systems:
A. The actuation is slow
B. The hydraulic pressure is the nominal one (maximum) all the time
C. Only one service can be obtained at a time
RESERVOIRS
A. Compensate leaks
B. Act as a thermal regulator
C. Are used normally and in emergencies
D. All of the above are correct
About temperature
A. Pneumatics can work at higher temperature.
B. Pneumatics can work at lower temperature.
C. Hydraulics can work at higher temperature.
D. Pneumatics are not affected by temperature.
Aircraft surfaces must be designed to suffer in flight aerodynamic degradation due to the ice formation
A. Yes, always.
B. Yes, but not during take off.
C. No, never.
D. Yes, but not during landing.
Which of the following are windscreen rain removal systems?
A. Curved and rear-sloping windscreen
B. Windshield wipers
C. Rain repellent: for torrential rain conditions
Which of the following are types of ice?
A. Clear ice
B. Rain ice
C. Rime ice
. A safe flight must take also into account possible weather hazards that might be encountered. These can be of different types:
A. structural (gust, hail impact)
B. ice
C. lightnings
. Mixed ice…
A. Is the Combination of glaze and rime ice
B. Can not occur today
C. Take place in clouds with temperature transitionfrom small to large supercooled water droplets.
D. Options A and C are true
About Rime ice…
A. It is a Transparent air free sheet
B. We can see in flight in dense clouds of small supercooled water droplets
C. It has an opaque white structure due to air trapped between droplets
D. It has an opaque white structure due to the viscosity of the types of droplets
Effects of ice accretion on an aircraft
A. Weight increases
B. Alteration of airfoil shape
C. Loss of control due to freeze in the joints between control surfacesand wings / tailplanes
About frost/Hoar frost…
A. Ice crystals from sublimation when water vapour freezes
B. Ice crystals from condensation when water vapour freezes
C. Black crystaline structure
D. It does form a heavy blanket but roughens the surface increaseaerodynamic performances
