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Which of the following is a typical source of air for the pneumatic system of a piston engine aircraft?
  • A
    Cylinder bleed air
  • B
    Supercharger air
  • C
    Ram air
  • D
    Intake manifold air
There are three typical sources of air used to pressurize reciprocating aircraft: supercharger, turbocharger and engine-driven compressor. Superchargers and turbochargers are installed on reciprocating engines to permit better performance at high altitude by increasing the quantity and pressure of the air in the induction system. Some of the air produced by each of these can be routed into the cabin to pressurize it.

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