Test 120 exam questions on Aircraft General Knowledge - Instrumentation for ATPL

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1 - The rate-of-turn is the: Yaw rate in a turn Aircraft speed in a turn Change-of-heading rate of the aircraft Pitch rate in a turn

2 - In the event of a conflict, the TCAS 2 (Traffic Collision alert and Avoidance System) presents warnings to the crew such as: 'Too low terrain' 'Turn left' or 'Turn right' 'Glide Slope' 'Climb' or 'Descent'

3 - The parameter that determines the relationship between EAS and TAS is: Pressure altitude. Mach number. OAT. Density altitude.

4 - In the northern hemisphere, during the take-off run in an easterly direction, a direct reading magnetic compass indicates: No apparent turn. An apparent turn to approximately the heading 100°. An apparent turn to the south. An apparent turn to the north.

5 - The purpose of an airplane automatic trim system is to trim out the hinge moment of the: Elevator(s) Elevator(s), rudder(s) and ailerons. Elevator(s) and rudder(s) Rudder(s)

6 - In the absence of position and instrument errors: IAS = EAS. IAS = CAS. CAS = TAS. CAS = EAS.

7 - In an auto-pilot slaved powered control circuit, the system which ensures synchronisation: Can itself, when it fails, prevent the automatic pilot from being engaged. Is inhibited when the automatic pilot is engaged. Prevents uncommanded surface deflection when the automatic pilot is disengaged. Intervenes only when the automatic pilot has been engaged.

8 - On the ground, during a left turn, the turn indicator indicates: Needle to the left, ball to the left Needle to the left, ball to the right Needle in the middle, ball to the left Needle in the middle, ball to the right

9 - The principle of a laser gyro is based on: A gyroscope associated with a laser compensating for gimballing errors. A gyroscope associated with a laser compensating for apparent wander due to the rotation of the earth. Two rotating cavities provided with mirrors. Frequency difference between two laser beams rotating in opposite direction.

10 - During deceleration following a landing in a northerly direction, a magnetic compass made for the southern hemisphere indicates: An apparent turn to the west. An apparent turn to the east. No apparent turn only on southern latitudes. No apparent turn.

11 - In a steep turn, the northerly turning error on a magnetic compass on the northern hemisphere is: None on a 270° heading in a left turn. None on a 090° heading in a right turn. Equal to 180° on a 090° heading in a right turn. Equal to 180° on a 270° heading in a right turn.

12 - In order to align an inertial reference system (IRS), it is required to insert the local geographical coordinates. This enables the IRS to: Find True North. Compare the longitude it finds with that entered by the operator. Initialize the FMS flight plan. Compare the latitude it finds with that entered by the operator.

13 - Concerning the directional gyro indicator, the latitude at which the apparent wander is equal to 0 is: Latitude 30° The equator The North pole Latitude 45°

14 - Concerning the TCAS (Traffic Collision Avoidance System): In one of the system modes, the warning: 'PULL UP' is generated In one of the system modes, the warning: 'TOO LOW TERRAIN' is generated Resolution Advisory (RA) must not be followed without obtaining clearance from ATC No protection is available against aircraft not equipped with a serviceable SSR transponder

15 - In the northern hemisphere, during deceleration following a landing in a northerly direction, a direct reading magnetic compass indicates: No apparent turn. A heading fluctuating about 360°. An apparent turn to the west. An apparent turn to the east.

16 - Given:E = electromotive force (emf) Tc = cold junction temperature Th = hot junction temperature K = constantThe relationship that applies to a thermocouple is: E = K x Tc2 E = K x Th2 E = K x Tc E = K x Th

17 - Hard iron magnetism in aircraft may be caused by: All answers are correct. A strike of lightning. Magnetic qualities of the cargo or baggage. Steel components, mainly in engines and undercarriage.

18 - The magnetic heading can be derived from the true heading by means of a: Map showing the isoclinic lines Deviation correction curve Map showing the isogonal lines Compass swinging curve

19 - Iron and brass are commonly used in bimetallic thermometers, because: They have two different weights. They have two different values of flexional strength. They have two different coefficients of linear expansion. They have two different electrical resistances when the temperature changes.

20 - An air data computer1. supplies the ground speed and the drift (angle)2. determines the total temperature and the true altitude3. receives the static pressure and the total pressure4. supplies the true airspeed to the inertial unit5. determines the Mach number, the outside (static) air temperature The combination regrouping all the correct statements is: 1 and 2 3, 4 and 5 2, 3 and 4 2 and 5

21 - A pilot wishes to turn left on to a southerly heading with 20° bank at a latitude of 20° North. Using a direct reading compass, in order to achieve this he must stop the turn on an approximate heading of: 160° 170° 200° 190°

22 - VNO is the maximum speed: Which must never be exceeded. Not to be exceeded except in still air and with caution. With flaps extended in landing position. At which the flight controls can be fully deflected.

23 - On the display of a TCAS 2 (Traffic alert and Collision Avoidance System), a resolution advisory (RA) is represented by: A white or cyan empty lozenge. A red full square. An amber solid circle. A white or cyan solid lozenge.

24 - The deviation of the magnetic compass is due to the action of: The hard iron pieces influenced by the geomagnetic field The hard iron pieces and the soft iron pieces influenced by the hard iron pieces The hard iron pieces influenced by the mild iron pieces The soft iron pieces influenced by the geomagnetic field

25 - When being engaged, and without selecting a particular mode, an automatic pilot enables: Aeroplane stabilisation with attitude hold or maintaining vertical speed and possibly automatic trim. Aeroplane piloting and guidance functions. All aeroplane piloting and guidance functions except maintaining radio-navigation course lines. A constant speed on track, wings horizontal.

26 - VNE is the maximum speed: Which must never be exceeded With flaps extended in landing position At which the flight controls can be fully deflected Not to be exceeded except in still air and with caution

27 - When the intruding aircraft is equipped with a transponder without altitude reporting capability, the TCAS (Traffic Collision Avoidance System) issues a: 'traffic advisory' and vertical 'resolution advisory'. 'traffic advisory' only. 'traffic advisory', vertical and horizontal 'resolution advisory'. 'traffic advisory' and horizontal 'resolution advisory'.

28 - The Ground Proximity Warning System (GPWS) is a system working according to a height span ranging from: 50 ft to 2 500 ft The ground to 500 ft 30 ft to 5 000 ft The ground to 1 000 ft

29 - When, in flight, the needle of a needle-and-ball indicator is on the left and the ball on the right, the aircraft is: Turning left with not enough bank Turning right with too much bank Turning right with not enough bank Turning left with too much bank

30 - A laser gyro consists of: A laser generating two light waves. Two moving cavities provided with mirrors. 2 electrodes (anode and cathode). A gyro with 2 degrees of freedom.

31 - If an aircraft maintaining a constant CAS and flight level is flying from a cold air mass into warmer air: TAS decreases. Mach number increases. Mach number decreases. TAS increases.

32 - In An Air Data Computer (ADC), aeroplane altitude is calculated from: Measurement of outside air temperature (OAT) The difference between absolute and dynamic pressure at the fuselage Measurement of elapsed time for a radio signal transmitted to the ground surface and back Measurement of absolute barometric pressure from a static source on the fuselage

33 - On a TCAS 2 (Traffic Collision Avoidance System) the preventive 'resolution advisory' (RA) is a 'resolution advisory': That advises the pilot to avoid certain deviations from the current vertical rate but does not require any change to be made to that rate. Asking the pilot to modify the speed of his aircraft. Asking the pilot to modify the heading of his aircraft. Asking the pilot to modify effectively the vertical speed of his aircraft.

34 - Some of the FMS have a navigation mode called Dead Reckoning mode (DR), computing airspeed, heading, wind data ground speed and time. This mode is: A navigation mode used to monitor the FMS position. An operating mode used to intercept radials To or From a flight plan waypoint. The normal navigation mode for FMS which do not use Inertial navigation Systems INS to compute the aircraft position. A back up navigation mode to compute a FMS position when the other navigation sensors are no longer operating.

35 - The response time of a vertical speed detector may be decreased by adding a: Return spring Bimetallic strip Second calibrated port Correction based on an accelerometer sensor.

36 - The probe used to measure the air intake pressure of a gas turbine engine powerplant is: An aneroid capsule. A bellows sensor. A Bourdon tube. A differential capsule.

37 - The gyromagnetic compass torque motor: Causes the directional gyro unit to precess Is fed by the flux valve Feeds the error detector system Causes the heading indicator to precess

38 - Given:Zp = pressure altitude Zd = density altitudeTAS can be obtained from the following data: EAS and Zp. EAS and Zd. CAS and Zp. CAS and Zd.

39 - Which of the statements about computer architecture are correct or incorrect? 1) The software part includes the programs that make up the operating system (OS). 2) The hardware part includes the physical components of the computer. 1) is correct, 2) is correct 1) is incorrect, 2) is correct 1) is incorrect, 2) is incorrect 1) is correct, 2) is incorrect

40 - On the display of a TCAS II (Traffic alert and Collision Avoidance System), a proximate traffic is represented by: A white or cyan solid lozenge. An amber solid circle. A red full square. A white or cyan empty lozenge.

41 - The 'Bourdon tube' is used to measure: Quantity. Temperature. A flow rate. Pressure.

42 - An aneroid capsule:1 - measures differential pressure 2 - measures absolute pressure3 - is used for low pressure measurement4 - is used for very high pressure measurementThe combination regrouping all the correct statements is: 2, 4. 1, 3. 1, 4. 2, 3.

43 - When an aircraft has turned 360 degrees with a constant attitude and bank, the pilot observes the following on a classic artificial horizon: Attitude and bank correct Too much nose-up and bank too high Too much nose-up and bank correct Too much nose-up and bank too low

44 - The altimeter consists of one or several aneroid capsules located in a sealed casing. The pressures in the aneroid capsule (i) and casing (ii) are respectively: (i) static pressure at time t (ii) static pressure at time t - dt (i) total pressure (ii) static pressure (i) vacuum (or a very low pressure) (ii) static pressure (i) static pressure (ii) total pressure

45 - The altimeter of your aircraft indicates 11000 ft with a subscale-setting of 1013,25 mb. QNH is 1023 hPa. OAT is +3°C. The pressure altitude of the aircraft is: 11740 ft. 10260 ft. The pressure altitude of the aircraft is: 11740 ft. 10260 ft. 11000 ft. 670 hPa.

46 - A thermocouple type thermometer consists of: Two metal conductors of different type connected at two points. A single-wire metal winding. A Wheatstone bridge connected to a voltage indicator. Two metal conductors of the same type connected at two points.

47 - The most common sensors interfacing a FMS to compute the aircraft position along the flight plan are:1- MLS2- GPS3- VOR4- IRSThe combination which regroups all of the correct statements is: 1, 2. 1, 2, 4. 2, 3, 4. 1, 4.

48 - With EAS and pressure altitude (Zp), we can deduce: TAS. CAS and TAS. CAS. IAS.

49 - The Mach trim system allows to: Search for the ideal CG location by transferring the fuel into the horizontal stabilizer. Increase the longitudinal static stability of the aircraft by changing the horizontal stabilizer according to the Mach number. Interlock the operation of the stick shaker at the oncoming of the high speed stall. Trim the pitch-up tendency at a high Mach number.

50 - Heading information from the gyromagnetic compass flux gate is transmitted to the: Heading indicator. Erecting system. Amplifier. Error detector.

51 - An inertial reference and navigation system is a "strapdown" system when: The gyroscopes and accelerometers are part of the unit's fixture to the aircraft structure. Gyros and accelerometers need satellite information input to obtain a vertical reference. Gyros and accelerometers are mounted on a stabilised platform in the aircraft. Only the gyros, and not the accelerometers, are part of the unit's fixture to the aircraft structure.

52 - A "close traffic advisory" is displayed on the display device of the TCAS II (Traffic Collision Avoidance System) by: A blue or white empty lozenge. A yellow full circle. A red full square. A blue or white full lozenge.

53 - During deceleration following a landing in an easterly direction, a magnetic compass made for the southern hemisphere indicates: A heading fluctuating about 090°. An apparent turn to the north. No apparent turn. An apparent turn to the south.

54 - To indicate a temperature, a thermocouple requires: Direct current Battery power Alternating current No power supply

55 - While inertial platform system is operating on board an aircraft, it is necessary to use a device with the following characteristics, in order to keep the vertical line with a pendulous system: Without damping and a period of about 84 minutes Without damping and a period of about 84 seconds With damping and a period of about 84 minutes. With damping and a period of 84 seconds

56 - Considering a stabilised platform inertial system: 1) The rate gyros and the accelerometers are mounted on the same platform. 2) The rate gyros and the accelerometers are mounted on two separated platforms. 3) The principle of operation requires at least 2 rate gyros. 4) The principle of operation requires at least 2 accelerometers.The combination that regroups all of the correct statements is: 2, 4 2, 3 1, 4 1, 3

57 - The TCAS II has inputs from the radio altimeter in order to: Determine the relative height of the intruder. Stop the TCAS operation below 2.500 ft AGL. Gradually inhibit the resolution advisories (RAs) when getting closer to the ground. To alert the crew from a dangerous proximity of the ground.

58 - Flight Director Information supplied by an FD computer is presented in the form of command bars on the following instrument: RMI Radio Magnetic Indicator. BDHI Bearing Distance Heading Indicator. HSI Horizontal Situation Indicator. ADI Attitude Director Indicator.

59 - Indication of Mach number is obtained from: An ordinary airspeed indicator scaled for Mach numbers instead of knots A kind of echo sound comparing velocity of sound with indicated speed Indicated speed and altitude using a speed indicator equipped with an altimeter type aneroid Indicated speed (IAS) compared with true air speed (TAS) from the air data computer

60 - A pilot wishes to turn right through 90° on to North at rate 2 at latitude of 40 North using a direct reading compass. In order to achieve this the turn should be stopped on an indicated heading of approximately: 360° 330° 010° 030°

61 - Without any external action, the axis of a free gyroscope is fixed with reference to: The earth. The apparent vertical. The aircraft. Space.

62 - The upper antenna of the TCAS II is: Omni-directional because it is merged with the transponder antenna. Directional because it is merged with the transponder antenna. Directional to improve the surveillance of intruders. Omni-directional to improve the surveillance of intruders.

63 - A ring laser gyro can measure: Rotation in all directions. Accelerations about its sensitive axis. Accelerations in all direction. Rotation about its sensitive axis.

64 - 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: Remains constant. Increases if the outside temperature is higher than the standard temperature, decreases if lower. Decreases. Increases.

65 - During the approach, the radio altimeter indicates 950 ft. This is: The relative height of the aircraft above airport level (AAL). The height of the pilot eyes with regard to the ground. The relative height of the aircraft with regard to the runway. The height of the lowest wheels with regard to the ground.

66 - The limits of the yellow scale of an airspeed indicator are: VLO for the lower limit and VNE for the upper limit VNO for the lower limit and VNE for the upper limit VFE for the lower limit and VNE for the upper limit VLE for the lower limit and VNE for the upper limit

67 - In a directional gyro, gimballing errors are due to: The vertical component of the earth's magnetic field An apparent weight and an apparent vertical The aircraft's movement over the earth A banked attitude

68 - The transmitter of RPM indicator may consist of:1- a magnetic sensor supplying an induced AC voltage 2- a DC generator supplying a DC voltage3- a single-phase AC generator supplying an AC voltage4- a three-phase AC generator supplying a three-phase voltage The combination regrouping all the correct statements is: 1,2,3,4 1,2,3 1,4 2,3,4

69 - Calibrated Air Speed (CAS) is obtained from Indicated Air Speed (IAS) by correcting for the: Position and instrument errors. Position and density errors. Density error. Instrument error.

70 - For the same TAS, when pressure altitude decreases below the tropopause: Mach number remains constant. The difference between surrounding conditions and ISA must be known to deduce the Mach number variation. Mach number increases. Mach number decreases.

71 - When engaged in the lateral navigation mode (LNAV) the autopilot uses: The FMS active (TO) waypoint coordinates. The FMS computation of the aircraft position and the FMS active (TO) waypoint bearing. The FMS roll or heading command. The FMS path angle command.

72 - The Ground Proximity Warning System (GPWS) generates the following sound signal or signals when the aircraft is sinking after a take-off or a go-around: DON'T SINK always followed by WHOOP WHOOP PULL UP WHOOP WHOOP PULL UP repetitive only DON'T SINK followed by WHOOP WHOOP PULL UP if the sink rate overshoots a second level DON'T SINK repetitive only

73 - The Primary Flight Display (PFD) displays information dedicated to: Piloting. Systems. Engines and alarms. Weather situation.

74 - In a turn at a constant angle of bank, the turn indicator reading is: Independent to the aircraft true airspeed Proportional to the aircraft true airspeed Proportional to the aircraft weight Inversely proportional to the aircraft true airspeed

75 - The yaw damper system sends a motion order to the rudder if the yawing rate of the aircraft: Is > 1 only. Is not constant. Is constant. Is > 0 only.

76 - Due to the rotation of the Earth, the apparent drift of a horizontal free gyroscope at a latitude of 45°N is: 2° per hour to the right. 15° per hour to the left. 11° per hour to the right. 7,5° per hour to the left.

77 - In order to align an IRS, it is required to insert the local geographical coordinates. This enables the IRS to:1 - compare the computed latitude with the one entered by the pilot 2 - compare the computed longitude with the one entered by the pilot 3 - know the longitudeThe combination that regoups all of the correct statements is: 2, 3. 1, 2. 1, 2, 3. 1, 3.

78 - When flying in warm air (warmer than standard atmosphere), indicated altitude is: Lower than the true altitude. Equal to the standard altitude. The same as the true altitude. Higher than the true altitude.

79 - The purpose of the vibrating device of an altimeter is to: Inform the crew of a failure of the instrument Reduce the effect of friction in the linkages Reduce the hysteresis effect Allow damping of the measurement in the unit

80 - Given:Pt = total pressure Ps = static pressure Dynamic pressure is: (Pt - Ps) / Ps (Pt - Ps) / Pt Pt / Ps Pt - Ps

81 - The operating principle of the vertical speed indicator (VSI) is based on the measurement of the rate of change of: Dynamic pressure Static pressure Kinetic pressure Total pressure

82 - The block diagram of an auto-pilot is shown in the annex.For each control channel (pitch, roll and yaw) the piloting law is the relationship between the deflection of the control surface commanded by the computer (BETA c) and the:

Pilot command E. Aircraft response S. Offset EPSILON at the computer input. Real deflection of the control surface (BETA control surface feedback).

83 - Torque can be determined by measuring the computed: Oil pressure at the fixed crown of an epicycloidal reducer of the main engine gearbox. Phase difference between 2 impulse tachometers attached to a transmission shaft. Frequency of an impulse tachometer attached to a transmission shaft. Quantity of light passing through a rack-wheel attached to a transmission shaft.

84 - Given:Mach number M = 0.70measured impact temperature = - 48 °Cthe recovery factor (Kr) of the temperature probe = 0.85The OAT is: - 68 °C - 45 °C - 51 °C - 65 °C

85 - Electrical requirements for an alumel / chromel indicating system are 3 phase AC for sensor plus 28V DC for gauging Power for gauge lighting only 28V DC for sensor plus power for gauge lighting 3 phase AC for sensor plus 26V AC for gauge lighting

86 - During a category III automatic approach, the position signals in the vertical plane under 200 ft are based on: An altimeter set to the QFE. A radio altimeter. An altimeter set to 1013 hPa. An altimeter set to the QNH.

87 - A "Bourdon tube" is used in: Smoke detectors. Vibration detectors. Turbine temperature probes. Pressure sensors.

88 - The signal transmitted by a radio altimeter is: An amplitude modulated carrier wave. A combination of frequency modulation and pulse modulation. A pulse modulated carrier wave. A frequency modulated carrier wave.

89 - In computer technology, an EPROM: 1) is a read-only memory 2) is a write memory 3) erases its content when power supply is cut off 4) keeps its content when power supply is cut offThe combination re-grouping all the correct statements is: 1, 4 2, 3 1, 3 2, 4

90 - A TCAS 2 (Traffic Collision Avoidance System) provides: A simple intruding airplane proximity warning. The intruder relative position and possibly an indication of a collision avoidance manoeuvre within the vertical plane only. The intruder relative position and possibly an indication of a collision avoidance manoeuvre within the horizontal plane only. The intruder relative position and possibly an indication of a collision avoidance manoeuvre within both the vertical and horizontal planes.

91 - The principle of the TCAS (Traffic Collision Avoidance Systems) is based on the use of: Airborne weather radar system Transponders fitted in the aircraft Air traffic control radar systems F.M.S. (Flight Management System)

92 - When turning into a desired radial, FD bars indicate: 45° angle of bank. 30° angle of bank. Correct attitude to intercept radial. 15° angle of bank.

93 - The operating frequency range of a low altitude radio altimeter is: 5400 MHz or 9400 MHz. 2700 MHz to 2900 MHz. 4200 MHz to 4400 MHz. 5 GHz.

94 - At a low bank angle, the measurement of rate-of-turn actually consists in measuring the: Yaw rate of the aircraft. Angular velocity of the aircraft. Roll rate of the aircraft. Pitch rate of the aircraft.

95 - The fields affecting a magnetic compass originate from:1. magnetic masses2. ferrous metal masses3. non ferrous metal masses4. electrical currentsThe combination regrouping all the correct statements is: 1, 2, 3, 4 1, 2, 3 1, 3, 4 1, 2, 4

96 - On a TCAS2 (Traffic Collision Avoidance System), a corrective 'resolution advisory' (RA) is a 'resolution advisory': Asking the pilot to modify effectively the vertical speed of his aircraft. Asking the pilot to modify the speed of his aircraft. Asking the pilot to modify the heading of his aircraft. Which does not require any action from the pilot but on the contrary asks him not to modify his current vertical speed rate.

97 - Below the tropopause, when descending at constant CAS: Mach number decreases and the velocity of sound increases. Mach number and the velocity of sound decrease. Mach number and the velocity of sound increase. Mach number increases and the velocity of sound decreases.

98 - The CVR (Cockpit Voice Recorder) includes:1. a microphone2. a recorder in compliance with the shock and fire resistance standards3. an independent battery4. a flight data recorderThe combination regrouping all the correct statements is: 1, 2 2, 4 1, 2, 3, 4 1, 4

99 - Lights indicating the possible need for future corrective action must be: Red. Amber. Magenta. Red and white striped.

100 - During deceleration following a landing in a southerly direction, a magnetic compass made for the northern hemisphere indicates: An apparent turn to the east. An apparent turn to the west. No apparent turn. No apparent turn only on northern latitudes.

101 - During the approach, a crew reads on the radio altimeter the value of 650 ft. This is an indication of the true: Height of the lowest wheels with regard to the ground at any time. Altitude of the aircraft. Height of the aircraft with regard to the runway. Height of the aircraft with regard to the ground at any time.

102 - If the pilot increases the reference pressure using the sub-scale setting knob, the altitude indicated by the altimeter: Decreases if QNH > 1013 hPa. Decreases if QNH < 1013 hPa. Increases. Decreases.

103 - The speed of sound at the sea level in standard atmosphere is: 644 kts 1059 kts 661 kts 332 kts

104 - When climbing at a constant Mach number: CAS decreases. Difference between surrounding conditions and standard atmosphere must be known to deduce the CAS variation. CAS remains constant. CAS increases.

105 - The properties of a gyroscope are: 1 - rigidity in space2 - rigidity on earth 3 - precession4 - Schuler oscillationsThe combination regrouping all the correct statements is: 2, 3. 1, 4. 1, 3. 2, 4.

106 - Given:Zp = pressure altitude Zd = density altitudeCAS can be obtained from the following data: EAS and Zp. TAS and Zd. TAS and Zp. EAS and Zd.

107 - If the outside temperature at 35 000 feet is -40°C, the local speed of sound is: 247 kt. 307 kt. 595 kt. 686 kt.

108 - During the ground run take-off phase, the auto-throttles allow to: Hold IAS. Maintain V2 under 1.500 ft. Hold N1. Hold and maintain the Mach number.

109 - During deceleration following a landing in a westerly direction, a magnetic compass made for the northern hemisphere indicates: A heading fluctuating about 270°. An apparent turn to the north. An apparent turn to the south. No apparent turn.

110 - In an autopilot system, the basic stabilisation modes are: 1) Altitude hold. 2) Pitch attitude hold. 3) Roll attitude hold. 4) IAS hold.The combination regrouping all the correct statements is: 1, 2, 3 2, 3, 4 2, 3 1

111 - At flight level and mach number constant, if OAT decreases, the CAS: Decreases. Increases. Decreases if OAT is lower than standard temperature, increases in the opposite case. Remains constant.

112 - The velocity maximum operating (V.M.O.) is a speed expressed in: Equivalent airspeed (EAS). True airspeed (TAS). Calibrated airspeed (CAS). Computed airspeed (COAS).

113 - The TCAS 2 (Traffic Collision Avoidance System) gives avoidance resolutions: Only in the horizontal plane In horizontal and vertical planes Only in the vertical plane Based on speed control

114 - A three-phase electrical tachometer consists of: A three-phase generator, a synchronous motor and a magnetic tachometer. Three speed probes and a phonic wheel. A speed probe and a phonic wheel. Three associated dynamos.

115 - 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... 7.5°/hour to the right. 15°/hour to the right. 7.5°/hour to the left. 10.5°/hour to the right.

116 - The position of a Flight Director command bars: Repeats the ADI and HSI information Enables the measurement of deviation from a given position. Indicates the manoeuvres to execute, to achieve or maintain a flight situation. Only displays information relating to radio-electric deviation.

117 - If, in the event of a failure, the approach, flare and landing can be completed by the remaining part of the automatic system, such an automatic landing system is considered as: Fail-operational. Fail-hard. Fail-soft. Fail-passive.

118 - The vertical command bar of a flight director: Repeats the position information given by the ILS in the horizontal plane. Repeats the position information given by the ILS in the vertical plane. Gives information about the direction and the amplitude of the corrections to be applied on the control commands. Gives information only about the direction of the corrections to be applied on the bank of the aircraft.

119 - Given the following parameters, in a capacitance fuel gauge, the correct formula is: A = area of platesD = distance between plates E = dielectric permittivity Capacitance = E x A / D Capacitance = E x D x A Capacitance = A x D / E Capacitance = E x D / A

120 - The spin axis of the turn indicator gyro is aligned along the: Lateral axis of the aircraft. Longitudinal axis of flight. Vertical axis of the aircraft. Longitudinal axis of the aircraft.

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Exam simulation Aircraft General Knowledge - Instrumentation ATPL - Airline Transport Pilot license

Exam simulation atpl 120 questions on 120 minutes