FAA Powerplant Written Practice Test

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Prepare for the FAA Powerplant Written Test. Study with flashcards and multiple choice questions, each featuring hints and explanations. Ace your exam with confidence!

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What type of fuel delivery system is utilized by two-stroke cycle engines in light sport aircraft?

Compressed air system
Centrifugal pump system
Gravity feed or oil injection system
Electrical fuel injection system

The correct answer is: Gravity feed or oil injection system

Two-stroke cycle engines, commonly used in light sport aircraft, typically employ a fuel delivery system that can include gravity feed or oil injection. This system allows for a simpler design as two-stroke engines often require a mixture of fuel and oil for lubrication. The gravity feed system relies on the natural force of gravity to move the fuel from the tank to the engine, which is advantageous in lightweight and less complex applications typical of light sport aircraft. In addition, many two-stroke engines utilize an oil injection system to ensure optimal lubrication without the need for the pilot to mix oil with fuel manually. This automated approach provides precise oil delivery, enhancing performance and reducing the likelihood of engine wear or failure due to insufficient lubrication. Thus, option C accurately reflects the efficient and effective fuel delivery system used in these engines.