Exam Question

### (a) The Four-Stroke Cycle Explained
The four-stroke cycle, also known as the Otto cycle for petrol engines or the Diesel cycle for diesel engines, is so named because it requires four distinct strokes of the piston to complete one power-producing cycle. These four strokes correspond to two complete revolutions of the crankshaft (720°). The cycle is fundamental to the operation of most internal combustion engines.
**(Source: The provided context accurately identifies the four strokes as induction, compression, power, and exhaust.)**
The four strokes are detailed as follows: