Ignition for p2

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Anonymous
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294915
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Ignition for p2
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2015-02-04 21:53:08
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ingition p2
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ignition p2
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  1. -What is the position of the rotating magnet at E gap?
    A few degrees after neutral
  2. -what is the position of the rotating magnet when flux
    density is at maximum?
    Full register
  3. -what is the position of the rotating magnet when flux
    density is at minimum?
    Neutral
  4. -what are the components of the magnetic circuit?
    Rotating magnet, coil core, pole shoes, pole shoe extensions
  5. -what are the components of a primary circuit in a high
    tension magneto?
    Ignition Switch, breaker points, condenser and primary coil
  6. -when does current flow through the primary windings?
    When the points are closed
  7. -what is the electrical orientation of the condenser in the
    primary circuit?
    Parallel to the points
  8. -what function does the condenser serve in a high tension
    magneto?
    Store electrical energy
  9. -what function does a condenser serve in a high tension
    magneto?
    Reduce arcing of the breaker points
  10. -an open or weak condenser will cause?
    Erratic firing and burning of the points
  11. -the breaker points are made of what material?
    Tungsten, iridium, platinum
  12. -what is the only component in the mechanical system?
    Breaker cam
  13. -what type of breaker cam is used in low tension magneto for
    an 8 cylinder opposed engine?
    Noncompensated type cam
  14. -how many lobes are on a compensated cam installed on an 18
    cylinder engine containing a 4 pole magnet?
    18 lobes
  15. - how many lobes are on a compensated cam installed on an 9
    cylinder engine containing a 4 pole magnet?
    9 lobes
  16. -the coil core in the magnetic circuit of a high tension
    magneto is normally made of?
    Laminated iron
  17. -which of the below best describes the makeup of the primary
    coil?
    Few turns of large wire
  18. -the distributer is part of which circuit in a low tension
    magneto?
    Primary
  19. -when does current flow through the secondary circuit of a
    high tension  magneto?
    When the points open
  20. -what type of conductor is used for high tension leads?
    Stranded and coiled stainless steel, and  stranded copper
  21. -what is a cable tester used for?
    Checking for electrical leakage of the cable
  22. -What is a high tension lead tester used for?
    Checking for leakage from the distributer leads
  23. -what type of conductor is used in high tension leads?
    Coiled stainless steel
  24. -what is the definition of ratio of turns?
    • The difference in the amount of turns between the primary
    • and secondary coil
  25. -what is a term best describing the existence of 2 magnetic
    fields in close proximity to the magnetic circuit?
    Resultant flux
  26. -one line of flux passing through one turn of wire in a coil
    produces?
    One flux linkage
  27. -what type of distributor is used on a low tension magneto?
    Carbon brush
  28. -what type of distributor is used on a high tension magneto?
    Air gap
  29. -how many secondary coils are used in a low tension ignition
    system?
    1 per plug
  30. -if a secondary coil in a LOW tension magneto circuit failed
    what would occur?
    Only one plug would fail
  31. - if a secondary coil in a HIGH tension magneto circuit
    failed what would occur?
    All plugs fail
  32. -a shorted left p lead would cause the left magneto to?
    Not operate
  33. -how many secondary coils would there be on a six cylinder
    turbo charged opposed engine using a high tension magneto?
    2
  34. -how many secondary coils would there be on a 14 cylinder
    turbo charged fuel injected 2 row radial engine using a low tension magneto?
    14
  35. -what sizes are commonly used on aircraft spark plug
    terminal nuts?
    • 3/4-20            
    • 5/8-24
  36. -which listed facts about spark plug heat ranges are true?
    • Both are correct: Is determined by the manufacturer, set by
    • the length of the insulator
  37. -whats the primary purpose of the resistor in a spark plug?
    Capacitance after firing and reduces electrode erosion
  38. -whats the purpose of the insulator of a spark plug?
    • Both are correct: seals the plug from ground and transfers
    • heat
  39. -what is the advantage of fine wire spark plugs?
    Better scavenging less lead fouling
  40. -what is recommended for removing lead fouling from a spark
    plug?
    Vibrator type cleaner
  41. -what is the firing order of the distributer of a 9 cylinder
    engine?
    1,2,3,4,5,6,7,8,9,
  42. -what is used to retard the spark on a booster coil system?
    Trailing electrode
  43. -which auxiliary ignition system is the only one that does
    not retard the spark?
    Induction vibrator
  44. -what is used to retard the spark on an induction vibrator
    system?
    They do not retard the spark
  45. -where is the output of the booster coil directed?
    The booster terminal of the right magneto distributor block
  46. -where is the output of the induction vibrator put into the
    system?
    Primary circuit of the right magneto
  47. -what is the purpose of the second set of points in a
    magneto?
    Used in the retarded starting circuit
  48. -which magneto uses shower of sparks?
    left
  49. -which of the following is true regarding Bendix shower of
    sparks?
    uses only the left magneto
  50. -what is the purpose of an impulse coupling?
    Single hot and retarded spark for starting
  51. -what would be the most likely result of an impulse coupling
    breaking?
    No effect above idle
  52. -what type of engine will an induction vibrator be found on?
    Large radial engine employing low tension magnetos
  53. -what is the output of the booster coil?
    High voltage pulsing DC
  54. -the engine timing may be verified as correct at the proper
    number of degrees before top dead center if?
    The points are just starting to open
  55. -A smooth yet excessive magneto drop on one magneto most
    likely indicates?
    One magneto out of time
  56. -what is the procedure followed before checking timing of a
    magneto with an impulse coupling?
    • Disengage the coupling by turning the propeller in the
    • direction of rotation until a snap is heard then back the prop up a few degrees
  57. -what effect will increasing RPM of a magneto have on the
    output?
    Increased output
  58. -what procedure is followed after a spark plugs are serviced
    on opposed engines?
    • reinstalled so that the polarity is opposite to previously
    • installed location
  59. -what is the most probable cause for the following symptom?During an operational check the
    following was noted:

    Both Mags: 1700, Right Mag: 1650,
    Left Mag: engine dies
    Left magneto is severely out of time
  60. what is the most probable cause for the following symptom?

    During an operational check the
    following was noted:

    Both Mags: 1900, Right Mag: 1900,
    Left Mag: engine dies
    Left mag P lead is grounded
  61. -to ensure proper magneto to engine timing the astute
    aviation technician should?
    • All of the above: check for distributor rotor position and
    • cylinder position, check points opening with a timing light
  62. -what do the spark plug designation numbers indicate?
    Heat range
  63. -what would happen if the impulse coupling spring broke
    before starting?
    Would be hard to start
  64. -which type of auxiliary ignition system uses a second set
    of points?
    Bendix shower of sparks
  65. -9 cylinder radial which distributor would fire the front
    spark plug on the number 6 cylinder?
    8 right
  66. -what is the most likely result if a magneto breaker point
    gap is less then specified?
    Retarded timing
  67. -what purpose does staggered timing serve in a recip engine?
    • Compensate for the diluted fuel air mixture around the
    • exhaust valve
  68. -What’s the purpose of the trailing electrode used with a
    booster coil system?
    Retard the spark for starting

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