Understand > DGAC : A flux valve detects the horizontal component of the earth's magnetic field.1 ?

Question 47-1 : 2 4 1 2 1 2 4 3 4

exemple 147 2, 4. — .the magnetic detector unit flux valve is fixed to the aircraft it feeds the error detector with information about the earth's magnetic field it is made of three soft iron bars this system is very accurate accuracy on the value of the magnetic field indication is less than 0 5° 2, 4.

The direct reading magnetic compass is no more reliable when approaching . 1 ?

Question 47-2 : 1 1 2 3 1 2 1 3

In the northern hemisphere during a take off run in a westerly direction a ?

Question 47-3 : An apparent turn to the north an apparent turn to the south no apparent turn an apparent turn to approximately the heading 255°

exemple 155 an apparent turn to the north. — Acceleration/deceleration errors are false compass indications of a swing to the north or south during speed changes of the airplane this error is most pronounced when flying on a heading of east or west and decreases when flying closer to a north or south heading in a direct north or south heading this error does not occur .in the northern hemisphere the compass swings towards the north during acceleration and towards the south during deceleration in the southern hemisphere this error occurs the other way round when the speed stabilises the error disappears.learn this for northern hemisphere ands . a cceleration gives apparent turn to n orth . d eceleration gives apparent turn to s outh an apparent turn to the north.

In the northern hemisphere during the take off run in an easterly direction a ?

Question 47-4 : An apparent turn to the north an apparent turn to the south no apparent turn an apparent turn to approximately the heading 100°

exemple 159 an apparent turn to the north. — Acceleration/deceleration errors are false compass indications of a swing to the north or south during speed changes of the airplane this error is most pronounced when flying on a heading of east or west and decreases when flying closer to a north or south heading in a direct north or south heading this error does not occur .in the northern hemisphere the compass swings towards the north during acceleration and towards the south during deceleration in the southern hemisphere this error occurs the other way round when the speed stabilises the error disappears.learn this for northern hemisphere ands . a cceleration gives apparent turn to n orth . d eceleration gives apparent turn to s outh an apparent turn to the north.

Which of the following statements about hard and soft iron in relation to ?

Question 47-5 : Hard iron magnetism is of a permanent nature and soft iron is of a non permanent nature both hard and soft hard iron are of a permanent nature both hard and soft iron are of a non permanent nature hard iron is of a non permanent nature and soft iron is of a permanent nature

exemple 163 hard iron magnetism is of a permanent nature and soft iron is of a non-permanent nature. — hard iron magnetism is of a permanent nature and soft iron is of a non-permanent nature.

The turning error of a direct reading magnetic compass ?

Question 47-6 : Increases when the magnetic latitude increases decreases when the magnetic latitude increases does not depend on the magnetic latitude decreases when the magnetic longitude increases

exemple 167 increases when the magnetic latitude increases. — increases when the magnetic latitude increases.

Direct reading magnetic compass errors are ?

Question 47-7 : Due to north change depending on the bank angle and magnetic heading due to the lateral gusts which occur when the aircraft is heading eastward or westward due to schuler oscillations parallax errors due to compass rose oscillations

exemple 171 due to north change, depending on the bank angle and magnetic heading. — due to north change, depending on the bank angle and magnetic heading.

The flux valve of a gyromagnetic compass .1 feeds the error detector.2 feeds ?

Question 47-8 : 1 3 1 2 2 3 3

exemple 175 1, 3. — .the gyro magnetic compass is made up of . a magnetic detector unit flux valve which electrically senses the direction of earth's magnetic field . a gyroscope which points to a fixed point in space regardless of any manoeuvres the aircraft makes . an error detector to sense any difference between the gyro and magnetic headings and apply corrections to the gyro.the magnetic detector unit flux valve feeds the error detector with information about the earth's magnetic field 1, 3.

A flux valve ?

Question 47-9 : Is usually located in the wing tip to avoid as much as possible magnetic disturbances of the airplane is a symetrical system located in each wingtip giving an average information less disturbed by the airplane structure is located in the wing tip to avoid vibrations is located along the fuselage aligned with airplane axis

exemple 179 is usually located in the wing tip, to avoid as much as possible magnetic disturbances of the airplane. — is usually located in the wing tip, to avoid as much as possible magnetic disturbances of the airplane.

An electromagnet is a type of magnet in which ?

Question 47-10 : The magnetic field is produced by the flow of an electric current the magnetic field is permanent no electric force is required a solenoid wire is coiled over permanent magnet

exemple 183 the magnetic field is produced by the flow of an electric current. — Revised ecqb03 july 2016 the magnetic field is produced by the flow of an electric current.

The inclination of the earth magnetic field at the magnetic equator is equal to ?

Question 47-11 : 0° 45° 90° 180°

exemple 187 0°. — Revised ecqb03 july 2016..at the magnetic equator the attraction of the compass needle towards the north and south poles is equal and the needle remains unbiased as the compass is moved either north or south of the magnetic equator the attraction to the nearest pole is increased thus the needle will be biased towards the nearest pole. 1006..this phenomenon is called magnetic dip and this compass error is amplified with the proximity to either pole 0°.

The earth's north magnetic pole ?

Question 47-12 : Is located approximately in northern canada is located in russia coincide with geographical north coincide with true north

exemple 191 is located approximately in northern canada. — Revised ecqb03 july 2016..the earth's magnetic north is located in hudson bay in canada .the location of the earth's magnetic poles periodically wanders as much as 15 km every year is located approximately in northern canada.

In the northern hemisphere during acceleration in a westerly heading a direct ?

Question 47-13 : Indicates an apparent turn to the north indicates an apparent turn to the south is late compared to the rate of turn of the aircraft is in advance compared to the rate of turn of the aircraft

exemple 195 indicates an apparent turn to the north. — Feedback cqb15 may 2012...acceleration/deceleration errors are false compass indications of a swing to the north or south during speed changes of the airplane this error is most pronounced when flying on a heading of east or west and decreases when flying closer to a north or south heading in a direct north or south heading this error does not occur .in the northern hemisphere the compass swings towards the north during acceleration and towards the south during deceleration in the southern hemisphere this error occurs the other way round when the speed stabilises the error disappears.learn this for northern hemisphere ands . a cceleration gives apparent turn to n orth . d eceleration gives apparent turn to s outh indicates an apparent turn to the north.

The principle of the compass swinging procedures is to ?

Question 47-14 : Determine the amount by which the compass readings are affected by hard and soft iron magnetism correct for deviation due to hard iron magnetism only correct for deviation due to soft iron magnetism only correct for deviation due to soft iron and hard iron magnetism

exemple 199 determine the amount by which the compass readings are affected by hard and soft iron magnetism. — Revised ecqb03 july 2016..the compass swinging procedures is the determination of the deviations due to aircraft's magnetic field . compass swinging determination of initial deviations . compass compensation correction of deviations found . compass calibration determination of residual deviations determine the amount by which the compass readings are affected by hard and soft iron magnetism.

Which of these statements about fundamental laws of magnetism are correct or ?

Question 47-15 : 1 is incorrect 2 is incorrect 1 is correct 2 is incorrect 1 is correct 2 is correct 1 is incorrect 2 is correct

exemple 203 1 is incorrect, 2 is incorrect. — Cqb15 august 2012. warning this question is in the database n°1059 with statements 1 and 2 inverted 1 unlike poles attract / 2 like poles repel each other .. 1032.like poles of magnets repel each other north pole and north pole south pole and south pole while different poles will attract each other north pole and south pole 1 is incorrect, 2 is incorrect.

The force of attraction or repulsion between two magnets ?

Question 47-16 : Varies inversely as the square of the distance between them is independent of the distance between them since a compass is able to aligns itself everywhere on the surface of the earth is proportional to the distance between them can not be measured

exemple 207 varies inversely as the square of the distance between them. — Cqb15 august 2012..the law of magnets states that like poles repel unlike poles attract if the poles are concentrated at points this force between two poles is proportional to the product of their strengths and varies inversely as the square of the distance between them varies inversely as the square of the distance between them.

The magnetic poles are the two positions on the earth's surface where the lines ?

Question 47-17 : Are entirely vertical are entirely horizontal are at 45° are at 0°

exemple 211 are entirely vertical. — . 1430..the force acting on a compass needle is directly proportional to the horizontal component of the earth's field and inversely proportional to the vertical component of the earth's.at the magnetic poles the earth's magnetic field is perpendicular to the earth's surface magnetic dip is 90° at the magnetic poles a dip needle stands vertical are entirely vertical.

The purpose of a magnetic compass compensation is to correct for ?

Question 47-18 : Deviations accelerations magnetic variation residual deviations

exemple 215 deviations. — .the compass swinging procedures is the determination of the deviations due to aircraft's magnetic field . compass swinging determination of initial deviations . compass compensation correction of deviations found . compass calibration determination of residual deviations deviations.

The purpose of a magnetic compass calibration is to ?

Question 47-19 : Determine the residual deviations determine the residual variation correct the residual deviations correct the residual variation

exemple 219 determine the residual deviations. — Ecqb03 july 2016..the compass swinging procedures is the determination of the deviations due to aircraft's magnetic field . compass swinging determination of initial deviations . compass compensation correction of deviations found . compass calibration determination of residual deviations determine the residual deviations.

The location of the earth's magnetic poles ?

Question 47-20 : Periodically wanders as much as 15 km every year periodically wanders as much as 100 km every year wanders twice a year wanders twice per decade

exemple 223 periodically wanders (as much as 15 km every year). — Ecqb03 july 2016 periodically wanders (as much as 15 km every year).

Which of these statements about fundamental laws of magnetism are correct or ?

Question 47-21 : 1 is correct 2 is correct 1 is incorrect 2 is incorrect 1 is correct 2 is incorrect 1 is incorrect 2 is correct

exemple 227 1 is correct, 2 is correct — Ecqb03 july 2016. warning this question is in the database n°1025 with statements 1 and 2 inverted 1 like poles attract / 2 unlike poles repel each other .. 1032.like poles of magnets repel each other north pole and north pole south pole and south pole while different poles will attract each other north pole and south pole 1 is correct, 2 is correct

Which of these statements about the properties of a simple bar magnet are ?

Question 47-22 : 1 is correct 2 is correct 1 is incorrect 2 is incorrect 1 is incorrect 2 is correct 1 is correct 2 is incorrect

exemple 231 1 is correct, 2 is correct. — Ecqb03 july 2016. warning this question also exists at the exam with the first statement written like this north or south poles can exist separately which in this is case is incorrect 1 is correct, 2 is correct.

The magnetic variation at any point on the earth's surface is the angle ?

Question 47-23 : Between the horizontal component of the magnetic field and true north direction between the vertical component of the magnetic field and true north direction between the horizontal component of the magnetic field and magnetic north direction between the vertical component of the magnetic field and magnetic north direction

exemple 235 between the horizontal component of the magnetic field and true north direction. — .the minimum magnetic variation declination is 0° .the maximum magnetic variation declination is 180°and this will be along a line between the magnetic north pole and the geographic north pole . 1417.black arrow the true north direction .red arrow the horizontal component of the magnetic north between the horizontal component of the magnetic field and true north direction.

The magnetic variation ?

Question 47-24 : Is caused by the different locations of the geographic north pole and the magnetic north pole is equal to 180° at the magnetic equator is equal to 90° at the magnetic equator is caused by the different locations of the geographic north pole and the true north pole

exemple 239 is caused by the different locations of the geographic north pole and the magnetic north pole. — .the minimum magnetic variation declination is 0° .the maximum magnetic variation declination is 180°and this will be along a line between the magnetic north pole and the geographic north pole . 1417.black arrow the true north direction .red arrow the horizontal component of the magnetic north is caused by the different locations of the geographic north pole and the magnetic north pole.

The inclination of the earth's magnetic field at the north magnetic pole is ?

Question 47-25 : 90° 0° 45° 180°

. 1430.the force acting on a compass needle is directly proportional to the horizontal component of the earth's field and inversely proportional to the vertical component of the earth's.at the magnetic poles the earth's magnetic field is perpendicular to the earth's surface magnetic dip is 90° at the magnetic poles a dip needle stands vertical

Because of the earth's magnetic field a compass placed anywhere on earth will ?

Question 47-26 : North magnetic pole south magnetic pole geographic north pole geographic south pole

exemple 247 north magnetic pole. — Revised ecqb04 october 2017 north magnetic pole.

Which of the following is an occasion for carrying out a compass swing on a ?

Question 47-27 : After an aircraft has passed through a severe electrical storm or has been struck by lightning before an aircraft goes on any flight that involves a large change of magnetic latitude after any of the aircraft radio equipment has been changed due to unserviceability whenever an aircraft carries a large freight load regardless of its content

exemple 251 after an aircraft has passed through a severe electrical storm, or has been struck by lightning. — after an aircraft has passed through a severe electrical storm, or has been struck by lightning.

The directive force of the earth's magnetic field ?

Question 47-28 : Is greatest at the magnetic equator increases as the magnetic variation increases increases as magnetic latitude increases varies with the heading of the aircraft

exemple 255 is greatest at the magnetic equator. — .at the magnetic equator the attraction of the compass needle towards the north and south poles is equal and the needle remains unbiased as the compass is moved either north or south of the magnetic equator the attraction to the nearest pole is increased thus the needle will be biased towards the nearest pole. 1006..this phenomenon is called magnetic dip and this compass error is amplified with the proximity to either pole.directive force = horizontal component of the earth's magnetic field is greatest at the magnetic equator.

The compass heading can be derived from the magnetic heading by reference to a ?

Question 47-29 : Compass swinging curve map showing the isoclinic lines deviation correction curve map showing the isogonal lines

exemple 259 compass swinging curve. — .the magnetic heading can be derived from the true heading by means of a map showing the isogonal lines .the compass heading can be derived from the magnetic heading by reference to a compass swinging curve.for information . compass swinging determination of initial deviations . compass compensation correction of deviations found . compass calibration determination of residual deviations compass swinging curve.

The indications on a directional gyroscope are subject to errors the most ?

Question 47-30 : 1 2 3 5 2 3 5 3 4 5 1 2 4 5

Graphic at reference shows three gyro assemblies a b and c .among these gyros . ?

Question 47-31 : 1b 2c 3a 1c 2b 3a 1b 2a 3c 1a 2b 3c

When an aircraft has turned 360 degrees with a constant attitude and bank the ?

Question 47-32 : Attitude and bank correct too much nose up and bank too low too much nose up and bank correct too much nose up and bank too high

exemple 271 attitude and bank correct. — For a classic artificial horizon air driven artificial horizon not for an electric artificial horizon since the pendulous vanes are affected by a horizontal acceleration as well as acceleration due to gravity errors in pitch and roll indications will occur during the turns the centrifugal force will act on the fore and aft pendulous vanes erection error and weighted base of the rotor housing pendulosity error .the errors are complex and change as the turn progresses cancelling out after a 360° turn the magnitude of the errors varies with speed rate of turn and type of horizon.the following errors will occur .after 90° of turn too much nose up and bank too low .after 180° of turn too much nose up and bank correct .after 270° of turn too much nose up and too much bank .after 360° of turn attitude and bank correct attitude and bank correct.

When an aircraft has turned 90 degrees with a constant attitude and bank the ?

Question 47-33 : Too much nose up and bank too low too much nose up and bank too high too much nose up and bank correct attitude and bank correct

exemple 275 too much nose-up and bank too low. — For a classic artificial horizon air driven artificial horizon not for an electric artificial horizon since the pendulous vanes are affected by a horizontal acceleration as well as acceleration due to gravity errors in pitch and roll indications will occur during the turns the centrifugal force will act on the fore and aft pendulous vanes erection error and weighted base of the rotor housing pendulosity error .the errors are complex and change as the turn progresses cancelling out after a 360° turn the magnitude of the errors varies with speed rate of turn and type of horizon.the following errors will occur .after 90° of turn too much nose up and bank too low .after 180° of turn too much nose up and bank correct .after 270° of turn too much nose up and too much bank .after 360° of turn attitude and bank correct too much nose-up and bank too low.

The gyroscope of a turn indicator has . nb the degree s of freedom of a gyro ?

Question 47-34 : 1 degree of freedom 3 degrees of freedom 2 degrees of freedom 0 degree of freedom

exemple 279 1 degree of freedom. — 1 degree of freedom.

The indication of the directional gyro is valid only for a limited period of ?

Question 47-35 : 1 3 1 3 4 1 2 3 1 2 4

exemple 283 1, 3. — A directional gyro consists of a 2 degrees of freedom horizontal axis gyro .it must be aligned and corrected by the pilot due to.rotation of the earth .apparent drift due to the earth's rotation is .15 x sin latitude in degrees per hour.the latitude in this case is the latitude of the actual position of the aircraft .for latitude change flight north or south take the mean aircraft latitude for the period involved.aircraft's moving over the surface of the earth transport wander .as the gyro is moved from one point on the earth to another the gyro maintains its orientation in space .however the direction of true north changes .further you travel in an east/west sense the greater the change .transport wander is the apparent loss of alignment caused by east /west travel and its value is simply the convergency between two points .transport wander in degrees = change of longitude x sin mean latitude.transport wander in an easterly direction will have a different sign from transport wander in a westerly direction 1, 3.

An airborne instrument equipped with a gyro with 2 degrees of freedom and a ?

Question 47-36 : A directional gyro an artificial horizon a turn indicator a fluxgate compass

exemple 287 a directional gyro. — A gyro with 2 degrees of freedom and a horizontal spin axis is a directional gyro.a gyro with 1 degree of freedom and a horizontal spin axis is a turn indicator a directional gyro.

An airborne instrument equipped with a gyro with 1 degree of freedom and a ?

Question 47-37 : Turn indicator gyromagnetic compass fluxgate compass directional gyro

exemple 291 turn indicator. — .a gyro with 2 degrees of freedom and a horizontal spin axis is a directional gyro . a gyro with 1 degree of freedom and a horizontal spin axis is a turn indicator turn indicator.

In a turn at a constant angle of bank the turn indicator reading is ?

Question 47-38 : Inversely proportional to the aircraft true airspeed proportional to the aircraft true airspeed independent to the aircraft true airspeed proportional to the aircraft weight

exemple 295 inversely proportional to the aircraft true airspeed. — .in a turn at a constant angle of bank a decrease in aircraft true airspeed involves an increase in rate of turn .rate of turn and tas are inversely proportional.example .rate of turn 3°/sec rate one turn .tas 100 kt .bank angle 15°.if now speed becomes 80 kt the turn indicator which previously show a 'rate one turn' is now showing more than a 'rate one turn' inversely proportional to the aircraft true airspeed.

At a low bank angle the measurement of rate of turn actually consists in ?

Question 47-39 : Yaw rate of the aircraft pitch rate of the aircraft roll rate of the aircraft bank of the aircraft

exemple 299 yaw rate of the aircraft. — .turn indicators and turn coordinators actually measure rate of yaw up to rate 1 the rate of yaw and rate of turn are virtually the same yaw rate of the aircraft.

The rate of turn is the ?

Question 47-40 : Change of heading rate of the aircraft yaw rate in a turn aircraft speed in a turn pitch rate in a turn

exemple 303 change-of-heading rate of the aircraft. — .the rate of turn is the number of degrees your heading changes in a period of time usually one second or one minute .a standard rate turn typically spoken of in terms of instrument flight is performed at 180 degrees of heading change in a one minute period this gives a complete 360° turn in two minutes change-of-heading rate of the aircraft.

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