Quiz: Aircraft Engine Mixture Control

For some student pilots the mixture control is a thing of mystery. It gets pulled out to shut off the engine, so let’s just leave it alone in flight. Its operation might seem elusive to new pilots but correct operation is critical to keeping the engine running smoothly and for maximum fuel savings. Answer these questions and see if you’re rich on mixture knowledge.

As altitude is gained, the density of air entering the engine decreases yet the amount of fuel will remain the same. This fuel / air ratio can be adjusted using which control?
As altitude is gained, the density of air entering the engine decreases yet the amount of fuel will remain the same. This fuel / air ratio can be adjusted using which control?
Correct! Wrong!
What scenario is most likely to cause a spark plug to foul?
What scenario is most likely to cause a spark plug to foul?
Correct! Wrong!
One good way to temporarily stop detonation or preigntion while in flight would be to
One good way to temporarily stop detonation or preigntion while in flight would be to
Correct! Wrong!
Operating an aircraft engine at high power settings and the mixture too lean can result in what condition?
Operating an aircraft engine at high power settings and the mixture too lean can result in what condition?
Correct! Wrong!
Which engine instrument is best for determining proper mixture settings?
Which engine instrument is best for determining proper mixture settings?
Correct! Wrong!
What procedure is used to achieve the best power mixture setting without an EGT?
What procedure is used to achieve the best power mixture setting without an EGT?
Correct! Wrong!
What is the term for an engine running on a chemically correct (stoichiometric) mixture where the fuel burn is at it hottest?
What is the term for an engine running on a chemically correct (stoichiometric) mixture where the fuel burn is at it hottest?
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Having a childhood dream of aviation, Chris first became an Aviation Explorer, motivating him to earn his private pilot's license as a teenager. During his four years at Embry Riddle Aeronautical University he earned his commercial, multi-engine certificate with an instrument rating. While experimenting in seaplanes, gliders, and a variety of other personal aircraft, Chris developed a passion for general aviation and shares that passion as he develops aviation training apps and content for Sporty's Pilot Shop.

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