An advantage of an axial flow compressor in a gas turbine engine is which of the following?

• A. Axial thrust
• B. Increased fuel consumption
• C. Reduced reliability
• D. Higher weight

Answer: (A)

The main idea here is that an axial flow compressor moves air primarily along the engine’s axis. As air is accelerated and compressed in that axial direction, pressure forces act along the shaft, producing a net force along the axis of the engine. This axial thrust is a direct result of the axial-flow arrangement and, when properly balanced with thrust bearings, fits naturally into the engine’s thrust path. The other options describe drawbacks (more fuel use, lower reliability, heavier weight) and are not benefits of using an axial flow design.