FAA Powerplant Written Practice Test

Which common feature do the HKS 700T, Jabiru 2200, and 3300 share?

1. They are all two-stroke engines

2. They are four-stroke engines

3. They use liquid cooling systems

4. They have a common ignition type

The correct answer is: They are four-stroke engines

The correct choice indicates that the HKS 700T, Jabiru 2200, and Jabiru 3300 are all four-stroke engines. Four-stroke engines operate on a cycle that includes four distinct strokes: intake, compression, power, and exhaust. This design is favored for its efficiency, reliability, and ability to produce smoother power output compared to two-stroke engines. In general aviation and light aircraft, four-stroke engines are commonly used as they tend to have better fuel efficiency and often require less maintenance than two-stroke engines. This characteristic allows them to be more suitable for the demands of various flight operations, contributing to their popularity within the realm of general aviation. Each of the engines mentioned, HKS 700T, Jabiru 2200, and Jabiru 3300, exemplifies this four-stroke design and demonstrates the advantages associated with it, such as improved fuel economy and lower emissions, which are particularly important in aviation applications.