CPL Aircraft General Knowledge

Candidates working towards a Commercial Pilot Licence. It is a theoretical knowledge examination, normally taken alongside the other CPL theory subjects, and must be passed before the commercial flight test. Confirm the exact sequence and prerequisites with your administering authority or flying training organisation.

It is delivered as multiple-choice questions. The number of items, the time allowed and the pass mark are set by the administering authority and are not reproduced here because they could not be verified from an official source at the time of writing. Check the authority's current pilot examination pages before you book.

Most candidates find AGK demanding because of its breadth rather than its mathematics. Systems questions reward genuine understanding of how components interact, so rote memorisation of isolated facts tends to fail under unfamiliar wording. Expect a mix of recall, interpretation and short applied reasoning rather than deep calculation.

Allow enough time to cover all five study areas properly and to revisit weak topics at least twice. A realistic plan is a structured first pass through a current syllabus and textbook, followed by timed practice and targeted revision of systems you cannot yet explain from memory. Adjust for your own background and study hours.

Retake arrangements, waiting periods and any limits on the number of attempts are set by the administering authority. These details could not be verified from an official source at the time of writing, so confirm the current policy with the authority or your flying training organisation before relying on any assumption about a second attempt.

Start with airframe structures and flight controls, because control response underpins everything else. Move to systems, then powerplants and propellers, then instruments and warning systems, which tie the earlier material together. Finish with performance limitations, since those questions assume you already understand the systems producing the numbers.

Confusing similar components, such as different valve types or alternator and generator behaviour; forgetting which indication corresponds to which system; and misreading questions that ask for the least likely answer. Another frequent error is memorising limitations without knowing the system that produces them, which collapses when the question is reworded.

Yes, at a working level. Expect relationships involving pressure and temperature, fuel flow and consumption, propeller pitch, slip and efficiency, and instrument errors. Learn what each relationship means physically, not just the equation, so you can still answer when the question is presented as a scenario rather than a formula.

From the civil aviation authority that issues your licence. The authority's pilot and flight crew examinations pages are the authoritative source for question count, duration, pass mark, fees, retake policy and validity. Verify these figures directly before booking, as published parameters are revised from time to time.