Diesel engines have ____% better fuel consumption than an Avgas engine.

Rome through the General Aircraft Technical Knowledge Exam. Dive deep into the core concepts of aircraft operation. Tackle multiple-choice questions and detailed explanations to ensure you soar to success. Prepare meticulously and conquer your test!

Multiple Choice

Diesel engines have ____% better fuel consumption than an Avgas engine.

Explanation:
This question tests understanding of how diesel piston engines achieve better fuel efficiency than avgas-fueled engines. Diesel designs operate with a higher compression ratio and can run lean at cruise, often using Jet-A fuel. Those factors raise thermal efficiency and reduce brake specific fuel consumption (fuel per horsepower-hour). In aviation pistons, this typically yields about a 15% reduction in fuel burn compared with a conventional avgas engine, which is why 15% is the commonly cited figure. A much smaller improvement (like 5%) isn’t typical, and a 25% or 50% jump would be unusually large given how these engines are designed and operated.

This question tests understanding of how diesel piston engines achieve better fuel efficiency than avgas-fueled engines. Diesel designs operate with a higher compression ratio and can run lean at cruise, often using Jet-A fuel. Those factors raise thermal efficiency and reduce brake specific fuel consumption (fuel per horsepower-hour). In aviation pistons, this typically yields about a 15% reduction in fuel burn compared with a conventional avgas engine, which is why 15% is the commonly cited figure. A much smaller improvement (like 5%) isn’t typical, and a 25% or 50% jump would be unusually large given how these engines are designed and operated.

More Multiple Choice Questions
Subscribe

Get the latest from Passetra

You can unsubscribe at any time. Read our privacy policy