Aerospace Propulsion Volume 5

  1. after reviewing the aircraft forms where should you begin troubleshooting?
    observe gauge indications
  2. all of the options below are proper troubleshooting techniques except
    inspecting other areas after isolating the trouble between two points
  3. troubleshooting TOs are presented in the form of
    troubleshooting charts
  4. to become an expert troubleshooter you must
    understand the function of each unit within each system
  5. the f100 monitoring system that acquires fault data from the digital electronic engine control and logs the faults with the time of their occurrences is the
    EDU engine diagnostic unit
  6. an understanding of the operating principles of engine instuments will help you decide
    the meanings of the instument readings
  7. most engine monitoring guages and instuments require some type of
    transmitter and indicator
  8. what jet engine temp is not measured
    combustion inlet
  9. a typical jet engine exhaust gas temperature (EGT) indicating system contains thermocouples, leads, an indicator, and a
  10. the engine fuel flow indicating system of most jet powered aircraft contain a fuel flow
    transmittor and indicator
  11. the fuel system component of a jet engine that operates by using a water wheel concept is
    fuel flow transmitter
  12. the fuel flow indicator indicates the rate of fuel flow as
    pounds per hour
  13. two units that work together to indicate that the oil system is operating correctly are the oil pressure
    transmitter and indicator
  14. the oil pressure indicator recieves an electrical signal from the
  15. the two primary units of the tachometer indicating system are the tachometer generator and tachometer
  16. the N2 tachometer generator is usually driven form the tachometer drive located on the
    engine accessory section
  17. the tachometer indicator is an
    electric-magnetic drag type instrument
  18. on engines with afterburners the position of the exhaust nozzle is converted into an electrical signal by
    a transducer
  19. one type of overheat detector unit used on aircraft engines consists of a hollow stainless steel tube that covers
    two silver contacts
  20. what is used to indicate the amount of thrust a dual compressor engine is producing
    engine pressure ratio
  21. the pressures used in the operation of the engine pressure ratio are
    engine inlet total pressure and exhaust total pressure
  22. inlet pressure is transmitted from its sensing point
    through tubing
  23. the direct oil pressure guage on a test cell is connected to an engine oil pressure line. this configuration will indicate oil pressur with out using wiring, indicator, or
    aircraft transmitter
  24. the test cell exhaust gas temperature EGT selector allows selection of
    individual therms or an average of inputs
  25. when properly adjustted the accuracy of the test cell N1 and N2 speed indicator will be within
    2 rpm
  26. the test cell IC temp indicator displays temps in degrees fahrenheit with a range of
    -50 -- 1,600
  27. what type of vibration causes unneccessary engine removals and unwarranted repairs
    externally excited
  28. what kind of engine vibration does not persist, but comes and goes
  29. during vibration analysis, frequency is usually measured in
    cycles per second
  30. forces acting to create vibration in a jet engine present a highly complex pattern. this is becuase the main rotor
    functions as a flexible rotor system
  31. during vibration analysis, why is it necessary to measure all parameters to identify a vibration source
    displacement can be the same with two completely different problems
  32. the two types of transducers used to measure vibration are
    velocity and piezoelectric accelerometer
  33. which type of vribration transducer is made up of certain ceramic compounds and natural crystals
    piezoelectric accelerometer
  34. the filter selector switch on the vibration analyzer is used to
    allow selection of necessary filters
  35. what is used to support the fan and low pressure turbine
  36. what procedure is used to ensure the fan and low pressure turbine are correctly balanced
    fan rotor trim balance
  37. the carbon seal tester simulates the effects of
    compressor airflow through the carbon seal
  38. the engine remote trimmer enables you to adjust
    the fuel control without going under the engine
  39. when connected to the engine, what piece of f100 engine test equipment becomes an engine electronic control
    supervisory control system (SCS) test set
  40. which piece of test equipment is used to troubleshoot a jet fuel starter problem on an f-16
    engine start system tester (ESS)
  41. you can find written instructions for safe flight line vehicle operations in
    AFOSH STD 91-100
  42. the term trim means to adjust the engine systems for optimum performance per the limits in the TO. There are two methods used to trim an engine. they are
    manual and electronic
  43. the pressure gauges used for an oil system pressure checks are connected at the
    output side of the main oil pump and the vent system
  44. when checking the turbine section, you do not measure
    intake gas temp IGT
  45. which f-16 operational chech allows you to start the jet fuel starter without advancing the throttle to idle or supplying fuel to the aircraft
    dry motoring
  46. prior to starting the engine when doin and anti-ice operational check on an f-16 place the anti-ice engine swith to
  47. how many primary air silencers are there on aircraft noise suppressors to help reduce turbine whine
  48. where are the primary silencers positioned on an aircraft noise suppressor
    against the aircraft fuselage
  49. to how many minutes should engine operation in afterburner be limited when the engine is operated in the aircraft noise suppressor
  50. the hush house exhaust deflector is constructed of
    small panel modules filled with noise reduction material
  51. before moving an aircraft into the hush house, you must inspect the aircraft
    and its forms
  52. after running an engine in augmentation in the hush house, the augmentor tube is cooled by running the engine at idle for a period of
    3 minutes
  53. during an inspection of the hush house you are not required to check
    the engine being tested
  54. in addition to determining the condition of a repaired or overhauled engine, you also test engines
    that have been involved in an incident or a mishap
  55. when testing a TF34 engine at test cell, which test is performed to ensure all operating limits and schedules from idle to maximum power are within limits
    transient check
  56. which testing engine is equipped with a quick engine change QEC kit
  57. the two types of test cells currently used in the AF areq
    fixed and portable
  58. a portable test cell is not equipped with a
    hydraulically operated pylon mount cradle
  59. which test cell noise suppressors use water to cool the exhaust gases
    both fixed and portable
  60. engines are mounted in the fixed test cell on a thrust stand or are suspended
    from a cradle mount
  61. in the fixed test cell, air for the engine intake comes through baffles located on the
    ceiling of the test cell
  62. the vertical baffles in the exhaust stack of the fixed test cell are designed to remove
    low-frequency sounds
  63. the portable test cell is not equipped with a
    model 3000 trailer
  64. on the portable test cell, the swivel pads at the bottom of the leveling jacks on the engine thrust trailer provide for all of the following except
    support the thrust trailer at a high of 80 inches
  65. the vibration pickups on the portable test cell are cooled by
    the pneumatic system
  66. the noise suppressor at a portable test cell is not equipped with
    a fuel trailer
  67. when an engine arrives for a test run at the test cell, it must
    be operable with all known discrepencies corrected
  68. which of these is not considered a cause of foreign object damage
    failure of internal parts
  69. which engine area should be checked for foreign object damage prior to operation on the test cell facility
    turbine area
  70. when making general entries on the test cell engine log sheet, what should you do with the engine model and serial number
    verify these numbers on the engine data plate
  71. to prevent damage to the load cells when you are transferring an engine to the test stand
    secure the upper and lower rails
  72. where would you begin your investigation of an engine with a possible oil consumption problem
    review form 781H, aerospace vehicle flight status and maintenance
  73. if an engine stalls or surges during a test cell run, you should investigate the
    variable stator vanes
  74. you can get information such as temperature and barometric pressure from equipment at the test cell site or from the
    control tower
  75. responsibility for the proper preventative maintenance of a test cell facility rests with the
    individuals assigned
  76. what information is used as an aid in test facility inspections
    periodic inspection checklists
  77. during an inspection, compressor blade defects that are within limits are
  78. defects such as cracks found during combustion chamber borescope inspections
    are continually monitored as long as they are within limits
  79. on a disassembled engine, a visual inspection the combustion chamber is preferred over a borescope inspection becuase
    you could spot defects that have been missed with a borescope
  80. through extensive testing, engine manufacturers determine how long a particular part should last. this is known as the
    service life
  81. using the wrong cleaning agent on a jet engine part
    could destroy it
  82. to borescope the high-pressure turbine rotor blades, rotate the rear compressor by ising the core engine rotating device on the
    accessory gearbox
  83. which one is not an inspection phase
    HSC home station check
  84. during what inspection phase are operational checks made according to the TO
  85. a basic post-flight inspection is done
    after the last flight of the flying period
  86. what inspection if done on aircraft parts that require infrequent inspections
  87. the home station check inspection is a combination of the basic post-flight and
    hourly post flight items
  88. which inspection is conducted by maintenance personnel after an occurrence of a specific or unusual condition
  89. a cold compressor stall that occurs at low revolutions per minute and is accompanied by a slight overtemp is called
    an incipient
  90. careless operation of the throttle during emergency system operation could cause a compressor stall due to
    rapid throttle movement
  91. compressor section failure from a chain reaction due to blade to blade and blade to vane interference is known as
    circumferential force
  92. what section of a compressor blade is most likely to fail
    near blade root
  93. what is the probable cause of compressor rotor shift
    thrust bearing failure
  94. if the turbine nozzles are burned out uniformly around the whole annulus from an overtemperature condition, this is known as a
    severe stall condition with disrupted cooling airflow
  95. turbine rotor blade failure usually occurs near the
  96. turbine blade fatigue failure does not result from
  97. which characteristic is the most common cause of bearing failure
    complete loss of lubrication
  98. bearing failure from moisture, lack of protective oils, improper handling, or improper storage could cause
    corrosion pitting
Card Set
Aerospace Propulsion Volume 5
Aerospace Propulsion Volume 5 CDC