The Axial Compressor Assembly provides which stage of compression?

• A. Provides the second stage of compression
• B. Provides the first stage of compression
• C. Provides the third stage of compression
• D. Provides no compression

Answer: (B)

The first stage of compression is delivered by the front part of the engine that houses the initial rotor and stator rows. Air enters the axial compressor assembly and encounters these first blades, which start to raise its pressure and speed. This is where compression begins, making the axial compressor assembly responsible for the initial, or first, stage of compression. After this first pass, air continues through additional stages to gain even more pressure, but the very first increase in pressure comes from this front assembly.