TECHGEN-BNC-MODULE11

TECHGEN-BNC-MODULE11

1. From the cruise, with all the parameters correctly set, if the altitude is reduced, to maintain the same mixture the fuel flow should:

a) remain the same
b) increase
c) increase or decrease, depending on the engine type
d) decrease

2. On an aeroplane, spoilers are:

a) upper wing surface devices, their deflection is symmetrical or asymmetrical.
b) lower wing surface devices, their deflection is always asymmetrical.
c) upper wing surface devices, their deflection is always asymmetrical.
d) lower wing surface devices, their deflection is symmetrical or asymmetrical.

3. If, when the magneto selector switch is set to the OFF position, a piston engine continues to run normally, the most probable cause is that:

a) The grounding wire on a magneto is broken.
b) There is a carbon deposit on the spark plugs electrodes.
c) A wire from the magneto is in contact with a metallic part of the engine.
d) There are local hot points in the engine (probably due to overheating of the cylinder heads).

4. A stage in an axial compressor:

a) has a compression ration in the order of 0.8
b) is made of row of stator blades followed by a rotor disc
c) is made of a rotor disc followed by a row of stator blades
d) has a compression ratio in the order of 2.1

5. The thrust of a turbo-jet, at the selection of full power: 1 - equals the product of the exhaust gas mass flow and the exhaust gas velocity 2 - is obtained by pressure of the exhaust gas on the ambient air 3 - is equivalent to zero mechanical power since the aeroplane is not moving 4 - is independent of the outside air temperature The combination which regroups all of the correct statements is:

a) 4
b) 1,2
c) 1,3
d) 2,3

6. The opening of the doors giving access to the oxygen masks for the passengers is: 1. pneumatic for the gaseous oxygen system, 2. electrical for the chemical oxygen system, 3. pneumatic for the chemical oxygen system, 4. electrical for the gaseous oxygen system. The combination regrouping all the correct statements is:

a) 1, 2
b) 2, 4
c) 2, 3
d) 1, 3

7. On an aircraft landing gear, an under-inflated tyre:

a) will have an increased critical hydroplaning speed
b) will wear at the shoulders
c) will be more subject to viscosity aquaplaning on dry runway
d) it's tread will deteriorate faster

8. The richness of a fuel/air mixture ratio is the:

a) mass of fuel relative to the volume of air.
b) volume of fuel relative to the mass of the volume of air.
c) real mixture ratio relative to the theoretical ratio.
d) volume of fuel relative to the volume of air.

9. On an airplane, the Krueger flaps are:

a) trailing edge flaps close to the wing tip
b) leading edge flaps close to the wing root
c) leading edge flaps close to the wing tip
d) trailing edge flaps close to the wing root

10. A smoke mask is a:

a) mask with flow on request and covers the whole face.
b) mask with flow on request and covers only the nose and the mouth.
c) continuous flow mask and covers the whole face.
d) continuous flow mask and covers only the nose and the mouth.

11. The equipment of an oxygen supply installation must be kept absolutely free of oil or grease traces as:

a) these substances could plug the oxygen masks filters.
b) the oxygen system would be contaminated.
c) these substances catch fire spontaneously in the presence of oxygen under pressure.
d) these substances mixed with oxygen could catch fire in the presence of a spark.

12. The installation and use of on-board oxygen generators is such that: 1 - the smoking ban is imperative when used 2 - in case of accidental drop of the "continuous flow" passenger masks, no crew action is required 3 - no trace of grease must be found in the system assembly 4 - the system's filling adaptors must be greased with non-freezing or graphite grease The combination which regroups all of the correct statements is:

a) 1,4
b) 1,3
c) 2,3
d) 2,4

13. During a power change on an engine equipped with a constant speed propeller, a wrong combination of manifold pressure and RPM values results in excessive pressures in the cylinders. This is the case when one simultaneously selects a ...

a) high manifold pressure and low RPM.
b) high manifold pressure and high RPM.
c) low manifold pressure and high RPM.
d) low manifold pressure and low RPM.

14. The correct statement about rain protection for cockpit windshields is that:

a) rain repellent should never be sprayed onto the windshield unless the rainfall is very heavy
b) the electric de-icing system for cockpit windows is also suitable for rain protection
c) wipers are sufficient under heavy rain conditions to provide adequate view through the cockpit windows.
d) the alcohol de-icing system for cockpit windows is also suitable for rain protection

15. Airliners are equipped with oxygen systems. It can be said that:

a) with setting on "NORMAL", the crew breathes a mixture of oxygen / cabin air.
b) the same circuit is used by the crew and the passengers.
c) the seals must be carefully greased to avoid sparks.
d) the passenger circuit never uses chemically generated oxygen.

16. When in flight, a piston engine is stopped and the propeller blade pitch angle is near 90Â°, the propeller is said to be...

a) feathered.
b) transparent.
c) at zero drag.
d) windmilling.

17. A scissor is a component found on landing gears. Its function is to:

a) create the wheel pitch on bogie gears.
b) make the body gears pivot when the nose wheel is turned through more than 20Â°.
c) prevent any rotation of the oleo strut in the undercarriage shock absorber.
d) transform the translational movement of the rudder pedals into the rotational movement of the nose wheel.

18. The frequency of the current provided by an alternator depends on...

a) the strength of the excitation current
b) its rotation speed
c) its load
d) its phase balance

19. Spark plug fouling is more likely to happen if:

a) the aircraft climbs without mixture adjustment.
b) power is increased too abruptly.
c) the engine runs at the authorized maximum continuous power for too long.
d) the aircraft descends without a mixture adjustment.

20. When a bimetallic strip is used as a switch in a fire detection loop, a fire alarm is triggered after a delay. The purpose of this delay is to:

a) wait for the triggering of the second fire detection loop in order to confirm the fire
b) delay the triggering of the fire extinguishers and increase their efficiency
c) allow temperatures to equalise
d) avoid false alarms in case of vibrations

21. In case of smoke in the cockpit, the crew oxygen regulator must be set to:

a) emergency.
b) 100%
c) on demand.
d) normal.

22. Compared to a tyre fitted with an inner tube, a tubeless tyre presents the following characteristics: 1 - high heating 2 - valve fragility 3 - lower risk of bursting 4 - better adjustment to wheels The combination containing all the correct statements is:

a) 1, 2, 3, 4.
b) 2, 4.
c) 3, 4.
d) 2, 3.

23. With engine fire alarm activated, the extinguisher discharge:

a) is automatic after a delay to allow the pilot to stop the engine
b) is the pilot's task
c) is automatic and immediate
d) does not need the engine to be stopped

24. The use of igniters is necessary on a turbo-jet: 1 - throughout the operating range of the engine 2 - for accelerations 3 - for ground starts 4 - for in-flight relights 5 - during turbulence in flight 6 - under heavy precipitation or in icing conditions The combination which regroups all of the correct statements is:

a) 3 - 4 - 5 - 6
b) 3
c) 1
d) 2-3-4

25. On a modern aeroplane, to avoid the risk of tyre burst from overheating, due for example to prolonged braking during an aborted take-off, there is:

a) the "Emergency Burst" function of the anti-skid system which adapts braking to the tyre temperature.
b) a pressure relief valve situated in the filler valve.
c) a hollow bolt screwed into the wheel which melts at a given temperature (thermal fuse) and deflates the tyre.
d) water injection triggered at a fixed temperature in order to lower tyre temperature.

26. In a turbo-jet, the purpose of the turbine is to ...

a) clear the burnt gases, the expansion of which provide the thrust
b) drive the compressor by using part of the energy from the exhaust gases
c) drive devices like pumps, regulator, generator.
d) compress the air in order to provide a better charge of the combustion chamber

27. In very cold weather, the pilot notices during startup, a slightly higher than normal oil pressure. This higher pressure:

a) requires an oil change.
b) is abnormal but does not require the engine to be shut down.
c) is normal, if it decreases after startup.
d) is abnormal and requires the engine to be shut down.

28. A passenger emergency mask is a:

a) mask with flow on request and cannot be used if there is smoke in the cabin.
b) continuous flow mask and cannot be used if there is smoke in the cabin.
c) mask with flow on request and can be used if there is smoke.
d) continuous flow mask and can be used if there is smoke in the cabin.

29. With a piston engine, when detonation is recognised, you:

a) Reduce manifold pressure and enrich the mixture
b) Reduce manifold pressure and lean the mixture
c) Increase manifold pressure and lean the mixture
d) Increase manifold pressure and enrich the mixture

30. Using compressor bleed air to power systems:

a) has no influence on aircraft performance
b) increases aircraft performance
c) is limited to the phases of take-off and landing
d) decreases aircraft performance

31. The control of free turbine engines on turboprops, is accomplished by: - a propeller control lever used to select: 1 - propeller RPM 2 - turbine temperature 3 - turbine RPM - a fuel control lever used to select: 4 - propeller RPM 5 - torque 6 - turbine temperature The combination which regroups all of the correct statements is:

a) 1,3,5
b) 1,5,6
c) 2,4,5
d) 3,4,6

32. Evacuation slide inflation is ensured by:

a) a pressurized gas canister combined with the slide itself.
b) a manual pump, used when needed by the cabin crew.
c) pressurized air from the air conditioning system.
d) the aircraft's general pneumatic circuit.

33. The main feature of BCF fire extinguishers is that they:

a) are highly corrosive particularly for aluminium alloys.
b) use the cooling effect created by the venturi during discharge.
c) are electrical conductors.
d) act as flame inhibitors by absorbing the air's oxygen.

34. A piston engine may use a fuel of a different grade than the recommended:

a) provided that the grade is higher
b) provided that the grade is lower
c) provided that it is an aeronautical petrol
d) never

35. The function of the Generator Breaker is to close when the voltage of the:

a) battery is greater than the alternator voltage and to open when the opposite is true
b) alternator is greater than the battery voltage and to open when the opposite is true
c) battery is greater than the generator voltage and to open when the opposite is true
d) generator is greater than battery voltage and to open when the opposite is true

36. The low pressure switch of a hydraulic circuit sets off an alarm if:

a) the reservoir level is at the normal operation limit.
b) there is a leak in the reservoir return line.
c) the pump power accumulator is deflated.
d) the pump output pressure is insufficient.

37. In the propagation of MF waves, the phenomenon of FADING is particularly found:

a) by day, due to the combination of sky and ground waves.
b) by day and when raining.
c) at night and when raining.
d) at night, due to the combination of the sky and ground waves.

38. The resistors R1 and R2 are connected in parallel. The value of the equivalent resistance (Req) so obtained is given by the following formula:

a) Req = R1 + R2
b) Req = R1 x R2
c) 1/Req = 1/(R1 + R2)
d) 1/Req = 1/R1 + 1/R2

39. Concerning the sequential pneumatic impulses used in certain leading edge de-icing devices, one can affirm that: 1 - They prevent ice formation. 2 - They are triggered from the flight deck after icing has become visible. 3 - A cycle lasts more than ten seconds. 4 - There are more than ten cycles per second. The combination which regroups all the correct statements is:

a) 2,3
b) 1.4
c) 1,3
d) 2.4

40. For a fan jet engine, the by-pass ratio is the:

a) internal airflow mass divided by the fuel flow mass
b) internal airflow mass divided by the external airflow mass
c) external airflow mass divided by the internal airflow mass
d) fuel flow mass divided by the internal airflow mass

41. An oxygen regulator has 3 controls: - a power lever: ON/OFF - an "O2" lever: NORMAL/100% - an emergency lever: ON/OFF Among the following statements, the correct proposition is:

a) the EMERGENCY lever on ON enables breathing of pure oxygen at ambient pressure.
b) the "O2" lever on ON enables breathing of the over-pressure oxygen at a constant flow rate.
c) the power lever on ON, and, the "O2" lever on NORMAL allows the oxygen to enter the regulator and enables breathing of a mixture of air/oxygen according to altitude.
d) with the EMERGENCY lever on OFF, in an emergency situation, one cannot use the oxygen mask to breathe.

42. The advantage of mounting the tailplane on top of the vertical stabilizer is:

a) to decrease fuel consumption by creating a tail heavy situation
b) that it does not require a de-icing system
c) to withdraw it from the influence of wing turbulence
d) to a have greater effectiveness at high speed

43. For an aeroplane hydraulic supply circuit, the correct statement is:

a) the reservoir constitutes a reserve of hydraulic fluid maintained under pressure by a pneumatic back pressure (air or nitrogen) and destined to serve as a fluid or pressure reserve.
b) the pumps are always electric due to the high pressures which they must deliver (140 to 210 kg/cmÂ²).
c) the security components comprise the filters, the pressure relief valves, the by-passes, and the fire shut-off valve.
d) the regulation system deals only with emergency operation and is not applied to all hydraulic services but only those considered as essential.

44. The pitch angle of a propeller is the angle between the:

a) propeller reference chord line and the extremity of the propeller.
b) propeller plane of rotation and the relative airflow.
c) reference chord line and the propeller plane of rotation.
d) propeller reference chord line and the relative airflow.

45. On a normally aspirated engine (non turbo-charged), the manifold pressure gauge always indicatesâ€¦

a) a greater value than atmospheric pressure when the engine is running.
b) zero on the ground when the engine is stopped.
c) a lower value than atmospheric pressure when the engine is running.
d) a value equal to the QFE when the engine is at full power on the ground.

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