PSA Airlines Canadair Regional Jet Systems (PSA-CRJ) Practice Exam

What is the primary purpose of the bleed air system in the aircraft?

1. Engine cooling

2. Air-conditioning and pressurization

3. Fuel management

4. Electrical power supply

The correct answer is: Air-conditioning and pressurization

The primary purpose of the bleed air system in an aircraft is to provide air for air-conditioning and pressurization. Bleed air is sourced from the engines or the APU (Auxiliary Power Unit), typically extracted from high-pressure areas of the compressor section of the engine. This compressed air is essential for various systems within the aircraft, particularly necessary for maintaining a comfortable cabin environment and ensuring that the aircraft is properly pressurized at high altitudes. By utilizing bleed air, the aircraft can regulate temperature and maintain appropriate pressure levels, which are crucial for passenger comfort and safety during flight. In addition to air-conditioning, the bleed air system is instrumental in operating certain pneumatic systems, such as de-icing and engine start systems. This integral function highlights the bleed air system's role in the overall performance and safety of the aircraft during operations.