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Refer to figure.
The engine type represented in the annex is…

  • A
    twin spool turbofan.
  • B
    triple spool turbofan.
  • C
    twin spool turbojet.
  • D
    single spool turbofan.

Refer to figure.
TURBOJET ENGINE
A Turbojet engine is a simple turbine engine that produces all of its thrust from the exhaust from the turbine section. There is no fan. However, because all of the air is passing through the whole turbine, all of it must burn fuel. This means it is inefficient, and the solution is the turbofan.

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