What type of engine completes a cycle in two strokes?

• A. Two-Stroke Engine
• B. Four-Stroke Engine
• C. Single Cycle Engine
• D. Reciprocating Engine

Answer: (A)

A two-stroke engine completes a power cycle in just two strokes of the piston, which consists of one revolution of the crankshaft. This means that every time the piston moves up and down twice, the engine produces a power stroke, making it more efficient in terms of power output for its size compared to four-stroke engines.

In contrast to four-stroke engines, which require four strokes of the piston (intake, compression, power, and exhaust) to complete a cycle, two-stroke engines achieve this more quickly, often leading to a more compact design with fewer moving parts. This design allows two-stroke engines to generate power with a simpler mechanism and, in many cases, a lighter weight, making them popular in applications such as lawn mowers, chainsaws, and some motorcycles.

The other options do not accurately describe the engine that completes a cycle in two strokes. A four-stroke engine, for instance, clearly requires four strokes to complete one cycle, while a single cycle engine is not a standard classification used in engine types. Additionally, the term reciprocating engine encompasses both two-stroke and four-stroke designs but does not specifically indicate the two-stroke operational cycle. Thus, a two-stroke engine is unmistakably