Which of the following is NOT a major section of an engine?

The major sections of an engine typically include the inlet, compressor, and exhaust. These components are integral to the engine's operation, particularly in turbine engines. The inlet gathers air and directs it towards the compressor, where it is compressed to increase its pressure before entering the combustion chamber. After the combustion process, the exhaust section expels the exhaust gases created, allowing for the propulsion of the engine.

The transmission, while essential in many vehicles as a means of transferring power from the engine to the wheels, is not considered a fundamental section of an engine itself. Instead, it is a separate system that works in conjunction with the engine to facilitate movement. This distinction highlights that the other options directly pertain to the engine's structure and function, while transmission operates as part of the broader vehicle dynamics.