Which statement is true about the high bypass ratio turbofan according to the provided material?

• A. Both the compressor and combustion chamber are larger
• B. Compressor larger and combustion chamber smaller
• C. Both smaller
• D. Compressor smaller and combustion chamber larger

Answer: (C)

The key idea is that a high bypass ratio turbofan relies on a very large fan to move most of the air around the engine core, so the core handles a smaller mass flow. Because the core doesn’t have to process as much air, its components are scaled down accordingly. A smaller core means a smaller compressor diameter and usually fewer or smaller stages, and a smaller combustion chamber sized to the reduced core flow. This combination keeps the engine efficient and lighter while delivering the required thrust mainly from the bypassed air.

So, in this design, both the compressor and the combustion chamber are smaller.