Describe the purpose of a bleed air system and two functions.

• A. Bleed air is used to vent exhaust.
• B. Bleed air provides pneumatic power for starting, anti-icing, and accessory operations; functions include start air and anti-ice/air conditioning.
• C. Bleed air cools the engine core and lubricates bearings.
• D. Bleed air is used for cabin pressurization only.

Answer: (B)