FAA Powerplant Written Practice Test

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

1. They are two-stroke engines

2. They utilize fuel injection

3. They are four-stroke engines

4. They have dual ignition systems

The correct answer is: They are four-stroke engines

The HKS 700T, Jabiru 2200, and Jabiru 3300 engines are all designed as four-stroke engines, which means they complete a power cycle in four distinct strokes of the piston: intake, compression, power, and exhaust. This type of engine is widely known for its efficiency, smooth operation, and the ability to run on a variety of fuels, typically avgas or automotive gasoline. Four-stroke engines generally provide better fuel economy and lower emissions compared to two-stroke engines, which is an important consideration for modern aviation applications. The engineering behind four-stroke designs allows for better thermal management and more consistent power output, making them well-suited for light aircraft engines like the ones mentioned. The other options reflect features not commonly shared across all three engine models. The HKS 700T and Jabiru engines are known for their four-stroke capability rather than the characteristics mentioned in the other choices.