1. Which of these statements is false? pg36
a) The pressurized air from the engine is enough for power pneumatic systems.
b) At ground APUs (Auxiliary Power Units) are used to provide pressurized air and electricity.
c) Jet engines use bleed air from compressor.
d) Reciprocating engines use bleed air from the turbocharger.
2. Has gas turbine pressure dependence on the shaft speed? pg36
a) Yes, it has a strong dependence.
b) No, gas turbine pressure depends on the compression ratio of the compressor.
c) a) and there must exist an engine bleed air control system.
d) b) apart from the compression ratio it depends on the outside temperature too.
3. The types of engine bleed systems are:
a) Intermediate and High pressure mixed systems.
b) Low and High pressure mixed system.
c) High isolated pressure system.
d) a) and b) are true.
4. Wich of these statements is true?
a) The pneumatic power has no return line
b) There’re no leakages and it’s easy to handle high pressures.
c) It’s the most common system to operate landing gears.
d) The pneumatic power systems need more tubing and valves than hydraulic systems.
5. The pneumatic systems are usually used to: ph36
a) Operate landing gears
b) Move alerions.
c) Pressurize hydraulics reservoirs.
d) Operate the brakes.
6. Pneumatic systems in Harrier aircrafts are used to: pg36
a) Operate the landing gear
b) Increase the speed during a conventional take off.
c) Give roll and pitch stability
d) Reduce the speed during a conventional landing.
7. Why does not the civil VTOL like the wing tips with pneumatic air to provide stability? pg36
a) Esthetically it’s not attractive.
b) They harm the aerodynamic.
c) They are not effective.
d) Because if the compressor fails, the aircraft lose the roll and pitch stability.
8. The air bleed system provides air to: pg37
a) Pressurisation system
b) Brake system
c) Alerions system
d) Cockpit temperature system.
1. Which of them are pumps pg37
a) Fuel transfer pumps.
b) Fuel booster pumps
c) Ejector pumps.
d) All of them.
2. What a suction valve is used ? pg37
a) During take off.
b) During landing.
c) If booster pumps fail.
d) During taxing.
3. Types of fuel level sensors: pg37
a) Float level sensor, Zener diode level sensor.
b) Ultrasonic sensor, optical level sensor, Capacitance sensor.
c) A and B are correct.
d) A and B are incorrect.
4. Which is the disadvantage of float level sensor:
a) It is expensive.
b) The float arm may stick or jam.
c) It is difficult to build.
d) The materials are too heavy.
5. If an emergency or malfunction after takeoff happens: pg37
a) The system jettison a large portion of the fuel to reduce weight rapidly.
b) The system maintains the fuel.
c) The system jettison all the fuel.
d) The system breaks.
6. What types of air refueling exit? pg38
a) Pats and boom.
b) Pods and boom.
c) Pats and baskets.
d) Pods and baskets.
7. What types of fuel tanks exist? pg38
a) Rigid tanks, flexible tanks, integral tanks.
b) Rigid tanks, adaptable tanks.
c) Rigid tanks, soft tanks.
d) Inside tanks, outside tanks.
8. What surge tanks do? pg38
a) Prevent the overflow while fuelling.
b) Allow expansion due to temperature changes.
c) Any of them.
d) Both of them.
