What is the bypass ratio of the CFM56-7B engine?

The bypass ratio of the CFM56-7B engine is indeed 5:1. The bypass ratio is defined as the ratio of the mass of air bypassing the engine core (the fan) to the mass of air that passes through the engine core (for combustion). A bypass ratio of 5:1 indicates that for every unit of air passing through the core, five units of air are bypassed around the core, which is characteristic of a high-bypass turbofan engine. This configuration is efficient for modern commercial aircraft as it contributes to reduced fuel consumption and noise levels, making the CFM56-7B a popular choice for many airliners.

Other choices might represent different engine types or designs that do not align with the specifications for this particular engine model, which is recognized for its optimal balance of thrust and efficiency.