National Council of Examiners for Engineering and Surveying (NCEES) Fundamentals of Engineering (FE) Chemical Practice Exam

In an Otto cycle engine, the components work together to facilitate the four fundamental strokes: intake, compression, power, and exhaust. The spark plug is essential as it ignites the air-fuel mixture to initiate combustion. The piston is crucial because it converts the energy from the combustion process into mechanical work, moving within the cylinder to create the necessary compression and expansion cycles. A compressor is also part of the process in some discussions about the overall engine operation, ensuring the air-fuel mixture is appropriately compressed before igniting.

However, a boiler is not a component typically found in an Otto cycle engine. While boilers are used in steam engines and other thermal cycles, they operate on a different principle involving phase change from liquid to vapor, which is not relevant to the Otto cycle. The absence of the boiler distinguishes the Otto cycle and aligns with its internal combustion engine design, focusing on direct chemical combustion rather than a separate heat exchange process.