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INST-BNC TOTAL THEORY-MODULE6
1.
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) approximately 0°/hour
b) +5°/hour
c) -5°/hour
d) 15°/hour
2.
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) during take-off or missed approach manoeuvre, the aircraft has started to loose altitude.
b) the aircraft experiences an unexpected proximity to terrain, without landing-flap selected.
c) the aircraft experiences an unexpected proximity to the terrain, with landing gear retracted.
d) at too low altitude, the aircraft has an excessive rate of descent.
3.
On a modern transport category airplane, the engagement of the automatic pilot is checked on the display of:
a) the PFD (Primary Flight Display).
b) the ND (Navigation Display).
c) the ECAM (Electronic Centralized Aircraft Monitoring) left screen .
d) the ND (Navigation Display) of the pilot in command.
4.
The position of a Flight Director command bars:
a) only displays information relating to radio-electric deviation.
b) enables the measurement of deviation from a given position.
c) repeats the ADI and HSI information
d) indicates the manoeuvres to execute, to achieve or maintain a flight situation.
5.
Which of the following statements are correct for an aeroplane cruising at FL 60 with a true airspeed (TAS) of 100 kt in standard atmospheric conditions? 1 - The TAS is approximately 10% higher than the IAS. 2 - The difference between the equivalent airspeed (EAS) and the calibrated airspeed (CAS) is negligible. 3 - The speed displayed on the airspeed indicator is a calibrated airspeed (CAS) if the position error and instrument error are zero.
a) 2 and 3 are correct.
b) 1, 2 and 3 are all correct.
c) 1 and 2 are correct.
d) 1 and 3 are correct.
6.
The electronic tachometer sensor is composed of:
a) a notched wheel rotating in front of an electro-magnet.
b) a circular magnet with four poles.
c) the rotor of a single phase A.C. generator.
d) the rotor of a three-phase A.C. generator.
7.
The advantages of a D.C. generator tachometer are: 1- easy transmission of the information. 2- independence of the information relative to the airborne electrical power supply. 3- freedom from any spurious current due to the commutator. The combination regrouping all the correct statements is:
a) 1, 2.
b) 1, 3.
c) 2, 3.
d) 1, 2, 3.
8.
A directional gyro is: 1- a gyroscope free around two axis 2- a gyroscope free around one axis 3- capable of self-orientation around an earth-tied direction 4- incapable of self-orientation around an earth-tied direction The combination which regroups all of the correct statements is: NB: the degree(s) of freedom of a gyro does not take into account its rotor spin axis.
a) 03-Feb
b) 04-Feb
c) 03-Jan
d) 04-Jan
9.
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) l degree-of-freedom in the vertical axis
b) 2 degrees-of-freedom in the vertical axis
c) 1 degree-of-freedom in the horizontal axis
d) 2 degrees-of-freedom in the horizontal axis
10.
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 270° heading in a right turn.
d) equal to 180° on a 090° heading in a right turn.
11.
The angle of attack transmitter placed laterally on the forward part of the fuselage supplies an electrical signal which can indicate the angular position of: 1 - a specific slaved pitot probe ; 2 - a vane detector ; 3 - a conical slotted probe . The combination regrouping all the correct statements is
a) 1, 2.
b) 1, 3.
c) 1, 2, 3.
d) 2, 3.
12.
About a magnetic compass:
a) errors of parallax are due to the oscillation of the compass rose
b) turning error is due to the vertical component of the earth's magnetic field.
c) acceleration errors are due to Schüler oscillations
d) acceleration errors are due to the angle of dip.
13.
A thermocouple can be made of:
a) two metal conductors of different nature fixed together at two points.
b) a single wire coil.
c) a three wire coil.
d) two metal conductors of the same nature fixed together at two points.
14.
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) remains constant.
b) increases.
c) decreases.
d) decreases if the outside temperature is higher than the standard temperature, increases if lower.
15.
The inputs to the GPWS (Ground Proximity Warning System), are: 1- Air Data Computer - (Mach number and Vertical Speed) 2- Radio Altimeter 3- NAV/ILS (Glide Slope) 4- NAV/VOR 5- Flap (position) 6- Weight of the aircraft 7- Landing Gear (position) The combination of correct statement is:
a) 1, 4, 7.
b) 1,2,3,5,7
c) 2, 4, 5, 6.
d) 2, 5, 6.
16.
During a category III automatic approach, the position signals in the vertical plane under 200 ft are based on:
a) a radio altimeter.
b) an altimeter set to the QNH.
c) an altimeter set to the QFE.
d) an altimeter set to 1013 hPa.
17.
The altimeter is supplied with:
a) differential pressure.
b) static pressure.
c) dynamic pressure.
d) total pressure.
18.
The automatic pitch trim: 1 - ensures the aeroplane is properly trimmed when the autopilot is engaged. 2 - permits the elevator to always be in neutral position with respect to horizontal stabiliser; 3 - ensures the aeroplane is properly trimmed when the autopilot is disengaged. The combination regrouping all the correct statements is
a) 1, 2.
b) 1, 2, 3.
c) 2, 3.
d) 1, 3.
19.
A stall warning system is based on a measure of:
a) attitude.
b) groundspeed.
c) aerodynamic incidence.
d) airspeed.
20.
The advantages of an electrical induction tachometer are: 1- the display is not sensitive to line resistance 2- the measurement is independent of aircraft power supply 3- the measurement is independent of temperature variations 4- the option to use without restriction several indicators connected in parallel to a single transmitter The combination regrouping all the correct statements is:
a) 1, 2, 3, 4.
b) 1, 3, 4.
c) 2, 3, 4.
d) 1, 2, 4.
21.
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) disappears, the new heading selection has deactivated the HDG mode.
b) deviates to the right and remains in that position until the aircraft has reached heading 360°.
c) deviates to its right stop as long as the aeroplane is more than 10° off the new selected heading.
d) deviates to the right and will be centred as soon as you roll the aircraft to the bank angle calculated by the flight director.
22.
The stall warning system of a large transport airplane includes: 1- an angle of attack sensor 2- a computer 3- a transmitter originating from the anemometer 4- an independent pitot probe 5- a transmitter of the flap/slat position indicating system The combination regrouping all the correct statements is:
a) 1, 2, 5.
b) 1, 4.
c) 1, 2, 4.
d) 1, 2, 4, 5.
23.
A flight director comprises a channel for: A. the attitude, B. the bank control, C. the pitch control, D. the speed. The combination regrouping all the correct statements is:
a) C, D.
b) A, B.
c) B, C.
d) A, D.
24.
The Mach trim system allows to:
a) interlock the operation of the stick shaker at the oncoming of the high speed stall.
b) search for the ideal C.G. location by transferring the fuel into the horizontal stabilizer.
c) trim the pitch-up tendency at a high Mach number.
d) increase the longitudinal static stability of the aircraft by changing the horizontal stabilizer according to the Mach number.
25.
The vertical speed indicator (VSI) is fed by:
a) dynamic pressure
b) total pressure
c) differential pressure
d) static pressure
26.
Torque can be determined by measuring the:
a) quantity of light passing through a rack-wheel attached to a transmission shaft.
b) oil pressure at the fixed crown of an epicycloidal reducer of the main engine gearbox.
c) phase difference between 2 impulse tachometers attached to a transmission shaft.
d) frequency of an impulse tachometer attached to a transmission shaft.
27.
The auto-throttles enables to hold: 1 - a true airspeed; 2 - a Mach number; 3 - an indicated airspeed; 4 - a N1 thrust. The combination regrouping all the correct statements is:
a) 2, 3, 4.
b) 1, 2, 3.
c) 1, 2, 3, 4.
d) 1, 2, 4.
28.
The purpose of the altitude alert system is to generate a visual and aural warning to the pilot when the:
a) airplane altitude is equal to the decision altitude.
b) altimeter setting differs from the standard setting above the transition altitude.
c) proximity to the ground becomes dangerous.
d) airplane altitude differs from a selected altitude.
29.
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.
30.
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) increases.
b) remains constant.
c) decreases.
d) decreases if the static temperature is lower than the standard temperature, increases if higher.
31.
The parameters taken into account by the flight director computer in the altitude holding mode (ALT HOLD) are: 1. altitude deviation 2. roll 3. bank attitude 4. pitch attitude The combination regrouping all the correct statements is:
a) 1, 4.
b) 1, 2.
c) 1
d) 1, 3.
32.
During the ground run take-off phase, the auto-throttles allow to:
a) maintain V2 under 1,500 ft.
b) hold and maintain the Mach number.
c) hold IAS.
d) hold N1.
33.
In an auto-pilot slaved powered control circuit, the system which ensures synchronisation:
a) prevents uncommanded surface deflection when the automatic pilot is disengaged.
b) can itself, when it fails, prevent the automatic pilot from being engaged.
c) intervenes only when the automatic pilot has been engaged.
d) is inhibited when the automatic pilot is engaged.
34.
A "Bourdon Tube" is used in:
a) vibration detectors
b) smoke detectors
c) turbine temperature probes
d) pressure sensors
35.
The maximum directional gyro error due to the earth rotation is:
a) 180°/hour
b) 15°/hour
c) 5°/hour
d) 90°/hour
36.
The disadvantages of a single-phase A.C. generator tachometer are: 1- the presence of spurious signals due to a D.C. generator commutator 2- the importance of line resistance on the information value 3- the influence of temperature on the tachometer information The combination regrouping all the correct statements is:
a) 1, 3.
b) 1, 2.
c) 2
d) 1, 2, 3.
37.
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) "TERRAIN, TERRAIN" followed by "WHOOP WHOOP PULL UP" (twice)
b) "TOO LOW, TERRAIN" (twice) followed by "TOO LOW GEAR" (twice)
c) "DON'T SINK, DON'T SINK"
d) "SINK RATE, SINK RATE" followed by "WHOOP WHOOP PULL UP" (twice)
38.
Alarms are standardised and follow a code of colours. Those requiring action but not immediately, are signalled by the colour:
a) green
b) red
c) amber
d) flashing red
39.
When the auto-pilot is engaged; the role of the automatic trim is to:
a) relieve the A.P. servo motor and return the aircraft in-trim at A.P. disconnect
b) react to altitude changes in Altitude Hold mode
c) synchronize the longitudinal loop
d) relieve the pressure on the control column and return, the aircraft in-trim at A.P. disconnect
40.
An autopilot system:
a) must provide at least aircraft guidance functions.
b) must provide automatic take off functions.
c) may provide automatic take off functions.
d) must provide at least aircraft stabilisation functions.
41.
When being engaged, and without selecting a particular mode, an automatic pilot enables:
a) aeroplane stabilisation with attitude hold or maintaining vertical speed and possibly automatic trim.
b) all aeroplane piloting and guidance functions except maintaining radio-navigation course lines.
c) aeroplane piloting and guidance functions.
d) a constant speed on track, wings horizontal.
42.
The sequence of the automatic landing comprises several phases (from final approach to touch-down) actuated by:
a) the radio altimeter.
b) the DME (Distance Measuring Equipment) of the ILS (Instrument Landing System).
c) the altimeter set to the QNH.
d) the distance left before the touch down zone.
43.
The advantages of single-phase A.C. generator tachometer are: 1- the suppression of spurious signals due to a D.C. generator commutator 2- the importance of line resistance on the information value 3- the independence of the information in relation to the airborne electrical power supply 4- the ease of transmission of the information The combination regrouping all the correct statements is:
a) 2, 4.
b) 1, 3.
c) 2, 3, 4.
d) 1, 2, 3, 4.
44.
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
45.
Heading information from the gyromagnetic compass flux gate is transmitted to the:
a) amplifier.
b) erecting system.
c) error detector.
d) heading indicator.
46.
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 dependent on the ground speed of the aircraft, its true track and the average latitude of the flight
b) is at its greatest value when the aircraft follows a meridional track
c) is, in spite of this, insignificant and may be neglected
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
47.
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) remains constant.
b) increases if the outside temperature is higher than the standard temperature, decreases if lower.
c) decreases.
d) increases.
48.
An aeroplane is in steady climb. The auto-throttle maintains a constant calibrated airspeed. If the total temperature remains constant, the Mach number:
a) decreases.
b) increases.
c) decreases if the static temperature is lower than the standard temperature.
d) remains constant.
49.
A gravity erector system is used to correct the errors on:
a) an artificial horizon.
b) a gyromagnetic compass.
c) a turn indicator.
d) a directional gyro.
50.
Among the following engine instruments, the one operating with an aneroid pressure diaphragm is the:
a) oil pressure gauge.
b) manifold pressure gauge.
c) oil thermometer.
d) fuel pressure gauge.
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