INST-SB-MODULE6

INST-SB-MODULE6

1. The electronic tachometer sensor is composed of:

a) a notched wheel rotating in front of an electro-magnet.
b) the rotor of a three-phase A.C. generator.
c) the rotor of a single phase A.C. generator.
d) a circular magnet with four poles.

2. The purpose of the altitude alert system is to generate a visual and aural warning to the pilot when the:

a) airplane altitude differs from a selected altitude.
b) airplane altitude is equal to the decision altitude.
c) proximity to the ground becomes dangerous.
d) altimeter setting differs from the standard setting above the transition altitude.

3. If an aircraft is flying (with flaps and landing gear retracted) in proximity to terrain and its GPWS (Ground Proximity Warning System) get activated, because it is detecting that the aeroplane has an excessive rate of descent, the system provides the following aural warning signals:

a) "SINK RATE, SINK RATE" followed by "WHOOP WHOOP PULL UP" (twice)
b) "TOO LOW, TERRAIN" (twice) followed by "TOO LOW GEAR" (twice)
c) "TERRAIN, TERRAIN" followed by "WHOOP WHOOP PULL UP" (twice)
d) "DON'T SINK, DON'T SINK"

4. If the GPWS (Ground Proximity Warning System) activates, and alerts the pilot with an aural warning "DON'T SINK" (twice times), it is because:

a) the aircraft experiences an unexpected proximity to terrain, without landing-flap selected.
b) at too low altitude, the aircraft has an excessive rate of descent.
c) during take-off or missed approach manoeuvre, the aircraft has started to loose altitude.
d) the aircraft experiences an unexpected proximity to the terrain, with landing gear retracted.

5. An aeroplane is in steady cruise at flight level 270. The auto-throttle maintains a constant calibrated airspeed. If the static air temperature increases, the Mach number:

a) decreases.
b) increases.
c) remains constant.
d) decreases if the outside temperature is higher than the standard temperature, increases if lower.

6. An aeroplane is in steady cruise at flight level 270. The auto-throttle maintains a constant calibrated airspeed. If the static air temperature decreases, the Mach number:

a) decreases.
b) remains constant.
c) increases.
d) increases if the outside temperature is higher than the standard temperature, decreases if lower.

7. An aeroplane is in a steady climb. The auto-throttle maintains a constant Mach number. If the total temperature remains constant, the calibrated airspeed:

a) remains constant.
b) decreases if the static temperature is lower than the standard temperature, increases if higher.
c) increases.
d) decreases.

8. An aeroplane is in steady descent. The auto-throttle maintains a constant calibrated airspeed. If the total temperature remains constant, the Mach number:

a) decreases.
b) increases.
c) increases if the static temperature is lower than the standard temperature, decreases if higher.
d) remains constant.

9. An aeroplane is in steady climb. The auto-throttle maintains a constant calibrated airspeed. If the total temperature remains constant, the Mach number:

a) increases.
b) decreases if the static temperature is lower than the standard temperature.
c) decreases.
d) remains constant.

10. The vertical speed indicator (VSI) is fed by:

a) dynamic pressure
b) total pressure
c) differential pressure
d) static pressure

11. The altimeter is supplied with:

a) static pressure.
b) total pressure.
c) dynamic pressure.
d) differential pressure.

12. When being engaged, and without selecting a particular mode, an automatic pilot enables:

a) aeroplane piloting and guidance functions.
b) a constant speed on track, wings horizontal.
c) aeroplane stabilisation with attitude hold or maintaining vertical speed and possibly automatic trim.
d) all aeroplane piloting and guidance functions except maintaining radio-navigation course lines.

13. An autopilot system:

a) must provide at least aircraft guidance functions.
b) may provide automatic take off functions.
c) must provide at least aircraft stabilisation functions.
d) must provide automatic take off functions.

14. An aircraft flies steadily on a heading 270°. The flight director is engaged in the heading select mode (HDG SEL), heading 270° selected. If a new heading 360° is selected, the vertical trend bar:

a) deviates to the right and will be centred as soon as you roll the aircraft to the bank angle calculated by the flight director.
b) deviates to its right stop as long as the aeroplane is more than 10° off the new selected heading.
c) deviates to the right and remains in that position until the aircraft has reached heading 360°.
d) disappears, the new heading selection has deactivated the HDG mode.

15. Alarms are standardised and follow a code of colours. Those requiring action but not immediately, are signalled by the colour:

a) flashing red
b) red
c) green
d) amber

16. About a magnetic compass:

a) errors of parallax are due to the oscillation of the compass rose
b) acceleration errors are due to the angle of dip.
c) acceleration errors are due to Schüler oscillations
d) turning error is due to the vertical component of the earth's magnetic field.

17. A stall warning system is based on a measure of:

a) groundspeed.
b) angle of attack.
c) airspeed.
d) attitude.

18. When the auto-pilot is engaged; the role of the automatic trim is to:

a) react to altitude changes in Altitude Hold mode
b) relieve the pressure on the control column and return, the aircraft in-trim at A.P. disconnect
c) synchronize the longitudinal loop
d) relieve the A.P. servo motor and return the aircraft in-trim at A.P. disconnect

19. Torque can be determined by measuring the:

a) quantity of light passing through a rack-wheel attached to a transmission shaft.
b) phase difference between 2 impulse tachometers attached to a transmission shaft.
c) frequency of an impulse tachometer attached to a transmission shaft.
d) oil pressure at the fixed crown of an epicycloidal reducer of the main engine gearbox.

20. For an aircraft flying a true track of 360° between the 5°S and 5°N parallels, the precession error of the directional gyro due to apparent drift is equal to:

a) 15°/hour
b) approximately 0°/hour
c) -5°/hour
d) +5°/hour

21. The engine instrument utilising an aneroid pressure diaphragm is the:

a) fuel pressure gauge.
b) oil temperature gauge.
c) manifold pressure gauge.
d) oil pressure gauge.

22. Heading information from the gyromagnetic compass flux gate is transmitted to the:

a) error detector.
b) amplifier.
c) erecting system.
d) heading indicator.

23. The position of a Flight Director command bars:

a) only displays information relating to radio-electric deviation.
b) indicates the manoeuvres to execute, to achieve or maintain a flight situation.
c) repeats the ADI and HSI information
d) enables the measurement of deviation from a given position.

24. In a steep turn, the northerly turning error on a magnetic compass on the northern hemisphere is:

a) none on a 090° heading in a right turn.
b) none on a 270° heading in a left turn.
c) equal to 180° on a 090° heading in a right turn.
d) equal to 180° on a 270° heading in a right turn.

25. The maximum directional gyro error due to the earth rotation is:

a) 15°/hour
b) 180°/hour
c) 90°/hour
d) 5°/hour

26. In an auto-pilot slaved powered control circuit, the system which ensures synchronisation:

a) can itself, when it fails, prevent the automatic pilot from being engaged.
b) intervenes only when the automatic pilot has been engaged.
c) is inhibited when the automatic pilot is engaged.
d) prevents uncommanded surface deflection when the automatic pilot is disengaged.

27. Heading information given by a gyro platform, is given by a gyro with: NB: the degree(s) of freedom of a gyro does not take into account its rotor spin axis.

a) 2 degrees-of-freedom in the vertical axis
b) l degree-of-freedom in the vertical axis
c) 1 degree-of-freedom in the horizontal axis
d) 2 degrees-of-freedom in the horizontal axis

28. A thermocouple can be made of:

a) a three wire coil.
b) two metal conductors of the same nature fixed together at two points.
c) two metal conductors of different nature fixed together at a single point.
d) a single wire coil.

29. An aircraft takes-off on a runway with an alignment of 045°; the compass is made for the northern hemisphere. During rolling take-off, the compass indicates:

a) a value above 045° in the northern hemisphere.
b) a value above 045° in the southern hemisphere.
c) a value below 045°.
d) 045°.

30. During an acceleration phase at constant attitude, the control system of the artificial horizon results in the horizon bar indicating a:

a) constant attitude
b) nose-down followed by a nose-up attitude
c) nose-up attitude
d) nose-down attitude

31. To permit turbine exit temperatures to be measured, gas turbines are equipped with thermometers which work on the following principle:

a) liquid expansion
b) gas pressure
c) bi-metallic strip
d) thermocouple

32. Among the systematic errors of the "directional gyro", the error due to the earth rotation make the north reference turn in the horizontal plane. At a mean latitude of 45°N, this reference turns by...

a) 10.5°/hour to the right.
b) 15°/hour to the right.
c) 7.5°/hour to the left.
d) 7.5°/hour to the right.

33. A turn indicator is an instrument which indicates rate of turn. Rate of turn depends upon:
1: bank angle
2: aeroplane speed
3: aeroplane weight
The combination regrouping the correct statements is:

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

34. The operating principle of the vertical speed indicator (VSI) is based on the measurement of the rate of change of:

a) Dynamic pressure
b) Static pressure
c) Kinetic pressure
d) Total pressure

35. The heading read on the dial of a directional gyro is subject to errors, one of which is due to the movement of the aircraft. This error...

a) is at its greatest value when the aircraft follows a meridional track
b) is, in spite of this, insignificant and may be neglected
c) is dependent on the ground speed of the aircraft, its true track and the latitude of the flight
d) shows itself by an apparent rotation of the horizontal axis of the gyroscope which seems to turn at 15° per hour to the right in the northern hemisphere

36. A "Bourdon Tube" is used in:

a) vibration detectors
b) turbine temperature probes
c) smoke detectors
d) pressure sensors

37. A gravity erector system is used to correct the errors on:

a) a directional gyro.
b) an artificial horizon.
c) a turn indicator.
d) a gyromagnetic compass.

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