Results
Q1. What happens to TAT when an aircraft descends at constant indicated Mach number?
Correct answer is – Remains constant then increases.
Q2. In a standby compass, the magnet system is immersed in a transparent liquid. The purpose of this liquid is to:
Correct answer is – increase sensitivity, increase aperiodicity
Q3. In a steady climb with the auto-throttle maintains a constant calibrated airspeed. If the total temperature remains constant, the Mach number:
Correct answer is – Increases.
Q4. The angle between Magnetic North and Compass North is called:
Correct answer is – compass deviation
Q5. When descending at constant CAS, the TAT and Mach meter indications should?
Correct answer is – Increase; decrease.
Q6. The roll out must be performed at……when turning from SW to SE in the northern hemisphere?
Correct answer is – 115 degrees.
Q7. The magnetic variation:
Correct answer is – is caused by the different locations of the geographical North pole and the magnetic North pole
Q8. At what DRMC reading is roll out required when conducting a turn from Southwest to south-east at 45 degrees north?
Correct answer is – 115 degrees.
Q9. During deceleration following a landing in an easterly direction, a magnetic compass made for the southern hemisphere indicates:
Correct answer is – an apparent turn to the north.
Q10. At a specific location, the value of magnetic variation:
Correct answer is – varies slowly over time
Q11. A runway in the southern hemisphere is on an agonic line and heading 045 degrees. If an aircraft with zero compass deviation takes off in still air, what will the northerly turning errors be?
Correct answer is – The compass will move to more than 045.
Q12. What is the strength of the H component of the earth’s magnetic field (in micro tesla ) at the North pole?
Correct answer is – 0
Q13. The compass heading can be derived from the magnetic heading by reference to a:
Correct answer is – deviation correction card / curve
Q14. When descending through an isothermal layer at a constant Calibrated Airspeed (CAS), The True Airspeed (TAS) will:
Correct answer is – Decrease.
Q15. Aircraft magnetism caused by hard iron:
Correct answer is – is not usually influenced by the earth’s magnetic field
Q16. What causes the northerly turning error in a magnetic compass?
Correct answer is – The magnetic dip characteristic
Q17. The magnitude, and sense, of turning error shown by a direct reading compass, varies with: 1. the design of the compass 2. the direction of the turn 3. the rate of turn 4. which hemisphere the aircraft is in 5. the heading of the aircraft 6. the amount of dip at the aircraft’s latitude of these statements:
Correct answer is – all are correct
Q18. What will the compass indicate as an aircraft lands and decelerates on a westerly heading on the magnetic equator?
Correct answer is – No turn.
Q19. If an aircraft in the northern hemisphere accelerates on a westerly heading, the compass needle moves………indicating a turn to the………?
Correct answer is – Anti-clockwise; north.
Q20. At the magnetic equator, when accelerating after take off on heading West, a direct reading compass :
Correct answer is – indicates the correct heading
Q21. The roll out must be performed at……when turning from NW to NE in the northern hemisphere?
Correct answer is – 065 degrees.
Q22. How will Mach meter indication respond if an aircraft passes through a cold front when flying at constant CAS and altitude?
Correct answer is – Remain constant.
Q23. A direct reading compass is used at North Magnetic Latitude. Starting a right hand turn from heading 300 will result in
Correct answer is – All 3 answers are correct
Q24. How will Mach meter indication respond if an aircraft is flying at constant CAS at FL270 when it experiences a reduction in OAT?
Correct answer is – No change.
Q25. In northern hemisphere, during an acceleration in an easterly direction, the magnetic compass will indicate:
Correct answer is – a decrease in heading
Q26. At FL350 with a ISA deviation of -12, the true airspeed when flying at M 0.78 is:
Correct answer is – 436 kt
Q27. A runway in the southern hemisphere is on an agonic line and heading 045 degrees. If an aircraft with zero compass deviation takes off in still air, what will the northerly turning errors be?
Correct answer is – The compass will move to more than 045.
Q28. If the pressure remains constant as temperature increases?
Correct answer is – Density will decrease, causing the CAS: TAS ratio to decrease.
Q29. When an aircraft on a westerly heading on the northern hemisphere accelerates, the effect of the acceleration error causes the magnetic compass to:
Correct answer is – indicate a turn towards the north
Q30. One of the factors causing error in a DRMC is?
Correct answer is – Accelerations on east/west headings.
Q31. Considering the maximum operational Mach number (MMO) and the maximum operational speed (VMO), the captain of a pressurized aircraft begins his descent from a high flight level. In order to meet his scheduled time of arrival, he decides to use the maximum ground speed at any time of the descent. He will be limited:
Correct answer is – Initially by the MMO, then by the VMO below a certain flight level.
Q32. What errors can the Air Data Computer correct for? 1. Instrument error & ram rise 2. Compressibility & density error 3. Lag & density error 4. Position & temperature error 5. Temperature & instrument error 6. Manoeuvre error & ram rise 7. Manoeuvre & position errors
Correct answer is – 2 & 4
Q33. The fields affecting a magnetic compass originate from: 1. magnetic masses 2. ferrous metal masses 3. nonferrous metal masses 4. electrical currents The combination regrouping all the correct statements is:
Correct answer is – 1, 2, 4
Q34. Grivation is the combination of
Correct answer is – Variation and Grid Convergence
Q35. An aircraft is accelerating to take-off in northern hemisphere on a runway with a QDM of 045o. Which way does the DRMC move?
Correct answer is – less than 45o
Q36. Which of the following statements is correct concerning the effect of turning errors on a direct reading compass?
Correct answer is – Turning errors are greatest on north/south headings, and are greatest at high latitudes
Q37. Deviation due to coefficient A is mainly caused by:
a misaligned lubber line (
- Coefficient A: Constant error on all headings.
- Mechanical Cause: Often due to the instrument being installed crookedly (Lubber line not aligned with longitudinal axis).
)
Q38. The directive force of the earth’s magnetic field:
Correct answer is – is greatest at the magnetic equator
Q39. The advantages of an ADC over a traditional pitot-static system (list): 1. position and compressibility correction 2. reduced lag 3. ability to supply many instruments 4. ability to act as an altimeter following failure
Correct answer is – 1, 2 & 3
Q40. The main requirements of a direct reading magnetic compass are that it should be:
Correct answer is – aperiodic, horizontal, sensitive
Q41. The roll out must be performed at……when turning from NW to SE in the northern hemisphere?
Correct answer is – 115 degrees.
Q42. What are the inputs to the ADC? 1. OAT 2. dynamic pressure 3. TAT 4. static pressure 5. electric power 6. pitot pressure 7. AoA
Correct answer is – 3, 4, 5, 6 & 7
Q43. When turning from SE to SW at 50 degrees north, the roll out should occur at?
Correct answer is – 245 degrees.
Q44. During a sustained turn …………… the nearer magnetic pole, the effect of liquid swirl will …………… compass turning error.
Correct answer is – towards; increase
Q45. In RIMC II The function of the torque motor in a gyro stabilized magnetic compass is to?
Correct answer is – Precess the directional gyro.
Q46. In a standby direct reading compass, there is:
Correct answer is – a circular magnet or pair of bar magnets pendulously mounted
Q47. The DRMC in an aircraft accelerating for landing on a runway with QDM 45 degrees, in the northern hemisphere, will indicate?
Correct answer is – More than 45 degrees.
Q48. The lines on the earth’s surface that join points of equal magnetic variation are called:
Correct answer is – isogonals
Q49. What would happen if the static pipe became detached from the back of a Mach meter in a pressurized aircraft at a high altitude?
Correct answer is – Under read.
Q50. What happens to mach meter indication in a constant RAS climb?
Correct answer is – Increases.
Q51. When carrying out a turn at the magnetic equator there will be:
Correct answer is – a tendency to under-read turns due to liquid swirl
Q52. The centre of gravity of the compass rose of a direct reading magnetic compass lies below the pivot point in order to reduce the influence of the:
Correct answer is – magnetic inclination
Q53. The quadrantal deviation of the magnetic compass is due to the action of:
Correct answer is – the soft iron pieces influenced by the geomagnetic field.
Q54. The advantages provided by an air data computer to indicate the altitude are: 1. Position/pressure error correction 2. Hysteresis error correction 3. Remote data transmission capability 4. Capability of operating as a conventional altimeter in the event of a failure.
Correct answer is – 1,3,4
Q55. When descending below the tropopause under normal conditions (increasing temperature) at a constant CAS:
Correct answer is – both TAS and mach number will decrease
Q56. For a position in the southern hemisphere, the effect of acceleration errors are greatest on headings:
Correct answer is – 090° and 270°
Q57. The Earth can be considered as being a magnet with the:
Correct answer is – blue pole near the north pole of the earth and the direction of the magnetic force pointing straight down to the earth’s surface
Q58. If the static source becomes blocked the Mach meter will ……as an aircraft climbs?
Correct answer is – Under indicate.
Q59. Hard iron magnetism in aircraft may be caused by
Correct answer is – All 3 answers are correct
Q60. European regulations (EU OPS-1) state that the maximum permissible deviations after compensation are:
Correct answer is – one degree for a remote indicating compass, and ten degrees for a direct reading magnetic compass
Q61. Which of these statements about the fundamental laws of magnetism are correct or incorrect? 1) Like poles attract each other 2) Unlike poles repel each other
Correct answer is – 1 is incorrect, 2 is incorrect
Q62. With regards to the turning error of a magnetic compass for an aircraft in the northern hemisphere, it will be greatest when turning through:
Correct answer is – North
Q63. During a straight and uniform climb, the pilot maintains a constant calibrated airspeed (CAS):
Correct answer is – The Mach number increases and the true airspeed (TAS) increases.
Q64. An aircraft has hard iron magnetism only, and this hard iron magnetism is represented by a red pole in relative bearing 070 from the compass. On what heading will the westerly deviation be maximum?
Correct answer is – Heading 020
- Calculate the Aircraft Heading: The red pole is fixed to the aircraft at a relative bearing of 070° (meaning it is always 70° to the right of the aircraft’s nose).
- To find the required heading, use the relationship:
- Magnetic Bearing of Pole = Aircraft Magnetic Heading + Relative Bearing of Pole
- 090° = Heading + 070°
- Heading = 090° – 070°
- Heading = 020°
- Conclusion: When the aircraft is on a heading of 020°, the red pole (situated 70° to the right) is positioned due East (090° Magnetic), pushing the North-seeking needle to the West and causing maximum Westerly deviation due to Hard iron magnetism.
Q65. The red pole of a freely suspended magnet will point towards …… and at 60°N will point …… at an angle known as the angle of ……
Correct answer is – the North magnetic pole, downwards, dip
Q66. How will CAS respond if temperature increases by 5 degrees C. when flying at a constant indicated Mach number at FL290?
Correct answer is – Remains approximately constant.
Q67. If the total force of the earth’s field at a point is T and the horizontal and vertical components H and Z, the value of H is found by the formula:
H=T cos dip (
- Trigonometry: H is the adjacent side to the Dip angle. T is the hypotenuse.
- Formula: H = T times cos(Dip).
)
Q68. What will the DRMC indicate when an aircraft lands in a southerly direction in the southern hemisphere?
Correct answer is – No turn.
Q69. Coefficient B, as used in aircraft magnetism, presents
Correct answer is – A value representing the deviation registered on headings East and West
Q70. The airspeed indicator of an aircraft is provided with a moving red and white hatched pointer. This pointer indicates the:
Correct answer is – Maximum speed in VMO operation versus altitude.
Q71. The direct indicating compass is no more reliable when approaching: 1) the magnetic poles 2) the magnetic equator with a east or west heading 3) the magnetic equator with a north or south heading The combination regrouping all the correct statements is:
Correct answer is – 1
Q72. Permanent magnetism in aircraft arises chiefly from:
Correct answer is – hammering, and the effect of the earth’s magnetic field, whilst under construction
Q73. The airspeed indicator of a twin-engine aircraft comprises different sectors and colour marks. The blue line corresponds to the:
Correct answer is – Optimum climbing speed with one engine inoperative, or VYSE.
Q74. Hard iron magnetism in aircraft
Correct answer is – Is permanent of nature
Q75. An aircraft in the southern hemisphere is turning from a heading of 090° to 360° using a DGI. At the end of the turn the compass will read …… than 360° and liquid swirl will …… this effect.
Correct answer is – less; decrease
Q76. Deviation on MH 180 is -5 and on MH 000 it is +3. Calculate coefficient C:
The correct answer is b) Coefficient C = +4.
- Concept: Coefficient C acts along the lateral axis, producing maximum deviation on North and South headings.
- Given Values: Deviation on North = +3, Deviation on South = -5.
- Formula: Coefficient C = (Deviation on North – Deviation on South) ÷ 2
- Calculation: (+3 – (-5)) ÷ 2 = 8 ÷ 2 = +4
Q77. An airplane is in a steady descent. The auto-throttle maintains a constant Mach number. If the total temperature remains constant, the calibrated airspeed:
Correct answer is – Increases.
Q78. In the calculation of deviation, the following headings are recorded: MH CH 358 356 091 087 182 186 273 271 Coefficient A is
Correct answer is – +1. Using the data provided:
- North: MH 358° – CH 356° = +2° (Easterly)
- East: MH 091° – CH 087° = +4° (Easterly)
- South: MH 182° – CH 186° = -4° (Westerly)
- West: MH 273° – CH 271° = +2° (Easterly)
- Step 2: Sum the deviations algebraically. Add the calculated deviations from the four headings together: (+2) + (+4) + (-4) + (+2) = +4
- Step 3: Calculate the average. Divide the total sum by the number of observations (which is 4) to find Coefficient A: +4 ÷ 4 = +1
Therefore, Coefficient A is +1, exactly matching the correct answer from your query.
Q79. A direct reading compass is used. Accelerating an aircraft on heading 090 at South Magnetic Latitude will result in
Correct answer is – An indication of a right turn on the compass
Q80. A pilot wishes to turn left on to a northerly heading with a 10o bank at a latitude of 50o North. Using a direct reading compass, in order to achieve this he must stop the turn on an approximate heading of:
Correct answer is – 030o
Q81. An Air Data Computer (ADC) obtains altitude from:
Correct answer is – barometric data from static source
Q82. Concerning direct reading magnetic compasses, in the northern hemisphere, it can be said that :
Correct answer is – on an Easterly heading, a longitudinal acceleration causes an apparent turn to the North
Q83. The velocity maximum operating (VMO) is a speed expressed in:
Correct answer is – Calibrated airspeed (CAS).
Q84. Which of these is a correct statement about the Earth’s magnetic field?
Correct answer is – It acts as though there is a large blue magnetic pole in Northern Canada
Q85. Soft iron is comparatively …….. to magnetize whilst hard iron is …….. to demagnetize.
Correct answer is – easy; difficult
Q86. To improve the horizontality of a compass, the magnet assembly is suspended from a point:
Correct answer is – above the Centre of gravity
Q87. **Compass swings should be carried out:
Correct answer is – only on the compass swinging base or site
Q88. The slow change in the earth’s magnetic variation is known as the ……. change and is caused by …….
Correct answer is – secular, westerly movement of the magnetic pole
Q89. An Air Data Computer (ADC) :
Correct answer is – Transforms air data measurements into electric impulses driving servo motors in instruments
Q90. An aircraft climbs at constant TAS from FL 200 to FL 400 the Mach meter indication will?
Correct answer is – Increase then remain constant.
Q91. A direct reading compass will not be affected by?
Correct answer is – Non-ferrous metals.
Q92. Cruising at FL390, M 0.84 is found to give a TAS of 499 kt. The ISA deviation at this level will be:
Correct answer is – +17
Q93. In the calculation of deviation, the following headings are recorded: MH CH 358 356 091 087 182 186 273 271 Coefficient B is
Correct answer is – +1
- Step 1: Calculate the deviation for the East and West headings. Deviation is the angular difference between the Magnetic Heading (MH) and the Compass Heading (CH), calculated as Deviation = MH – CH. Positive values indicate Easterly deviation, while negative values indicate Westerly deviation. Using the data provided in your query:
- East: MH 091° – CH 087° = +4° (Easterly)
- West: MH 273° – CH 271° = +2° (Easterly)
- Step 2: Apply the formula for Coefficient B. Coefficient B is calculated by taking half the algebraic difference between the deviations on the East and West compass headings. The formula is: Coefficient B = (Deviation on East – Deviation on West) ÷ 2.
- Step 3: Perform the calculation.
- Coefficient B = (+4 – (+2)) ÷ 2
- Coefficient B = (+4 – 2) ÷ 2
- Coefficient B = 2 ÷ 2
- Coefficient B = +1
Therefore, Coefficient B is +1.
Q94. When turning right through 90 degrees to north, in the northern hemisphere, roll out should be conducted on a heading of?
Correct answer is – 330 degrees.
Q95. An aircraft is flying at FL350 with a ISA deviation of +8. The Mach No. is 0.83 and the TAS 485. If the aircraft descends to FL300 and maintains the same Mach No. and TAS, the ISA deviation will now be:
Correct answer is – -2
Q96. In discussing parameters P, Q and R of aircraft hard iron magnetism
The correct answer is a) -Q indicates a blue pole in the left wing.
Here is the breakdown of the aircraft hard-iron magnetism components (P, Q, and R) based on the sources, which explains why only statement (a) is correct:
- Component P (Longitudinal): This represents the hard-iron magnetism acting along the fore-and-aft axis of the aircraft. By convention, a +P component indicates that the blue pole is forward (in the nose), not a red pole.
- Component Q (Lateral): This represents the magnetism acting along the wing-tip to wing-tip axis. A +Q component means the blue pole is to starboard (the right wing). When the polarity is reversed to -Q, it means the blue pole is to port (the left wing), making statement (a) correct.
- Component R (Vertical): This represents the magnetism acting vertically through the aircraft. A +R component indicates that the blue pole is beneath the compass, not a red pole.
Because statements b and c describe the opposite polarities for their respective positive components, they are incorrect.
Q97. In the calculation of deviation, the following headings are recorded: MH CH 358 356 091 087 182 186 273 271 Coefficient C is
- Step 1: Calculate the deviation for the North and South headings. Deviation is the difference between the Magnetic Heading (MH) and the Compass Heading (CH), calculated as Deviation = MH – CH. Using the data provided:
- North: MH 358° – CH 356° = +2° (Easterly)
- South: MH 182° – CH 186° = -4° (Westerly)
- Step 2: Apply the formula for Coefficient C. Coefficient C is calculated by taking half the algebraic difference between the deviations on the North and South compass headings. The formula is: Coefficient C = (Deviation on North – Deviation on South) ÷ 2
- Step 3: Perform the calculation.
- Coefficient C = (+2 – (-4)) ÷ 2
- Coefficient C = (+2 + 4) ÷ 2
- Coefficient C = 6 ÷ 2
- Coefficient C = +3
Therefore, the correct answer for Coefficient C is +3.
Q98. A magnetic compass must be swung?
Correct answer is – After long term changes in latitude.
Q99. Permanent magnetism in aircraft is caused by?
Correct answer is – The hammering of rivets during construction.
Q100. When turning right from 330°(C) to 040°(C) in the northern hemisphere, the reading of a direct reading magnetic compass will:
Correct answer is – under-indicate the turn and liquid swirl will increase the effect