What is another term for the expansion phase in a two-stroke cycle?

The phase referred to as the expansion phase in a two-stroke cycle is commonly known as the power phase. This is when the piston moves down after the fuel-air mixture ignites, and the expanding gases push the piston down, doing work on the crankshaft.

During the power phase, the energy released from the combustion of the fuel-air mixture is converted into mechanical work. This is a critical phase in the two-stroke cycle since it is when the engine generates its output power.

The terms listed in the other choices refer to different processes in the engine cycle. The compression phase involves compressing the fuel-air mixture before ignition. The exhaust phase is when the burnt gases are expelled from the cylinder. The combustion phase describes the actual process of burning the fuel-air mixture. Each of these phases has its distinct function, distinct from the expansion or power phase where the work is produced.