How many degrees of crankshaft rotation does one stroke represent?

In an internal combustion engine, each stroke of the piston corresponds to a specific degree of crankshaft rotation. One complete cycle of an engine involves two strokes: the intake and the power stroke. Each of these strokes is associated with 180 degrees of crankshaft rotation.

When the crankshaft rotates 180 degrees, the piston moves from the top dead center (TDC) to the bottom dead center (BDC) or vice versa, completing one stroke. Thus, since one stroke corresponds to this 180-degree rotation of the crankshaft, this choice is identified as the correct answer. Understanding this relationship is crucial for mechanics and those studying engine functionality, as it plays a fundamental role in the timing and operation of the engine's cycles.