Engines Ch.10

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Engines Ch.10
2012-04-24 20:16:12
API 12 25

Book questions chapter 10
Show Answers:

  1. What is the start sequence?
    Compressor RPM, ignition, fuel
  2. What are the different types of starters?
    DC electric motor and air turbine
  3. Which starter is commonly used on smaller gas generator engines?
    DC electric motor
  4. What are some uses for compressor discharge air?
    drive accessories, air conditioning and cabin pressurization.
  5. Where would you find the hottest air: the high or low pressure compressor?
    High pressure compressor
  6. In a dual spool axial flow engine, which compressor would provide bleed air for anti-ice protection?
    High pressure compressor
  7. What are some mechanically-driven accessories?
    generators, alternators, pumps
  8. Why do you want the starter to remain engaged after you've reached self-accelerating speed?
    To decrease the potential for an abnormal start by reaching normal idle rapidly.
  9. What is the most common type of large gas generator starter?
    Air turbine starter
  10. How does an air turbine starter work?
    A small geared air turbine motor attached to the accessory drive gearbox that turns the accessory drive shaft and rotates the compressor.
  11. What type of ignitor plugs are used in gas turnbine engine ignition systems?
    Annular gap and constrained gap
  12. What causes the flame to spread between combustion chambers in can or can-annular designs?
    flame propagation tubes
  13. How many ignitor plugs does each engine utilize?