SACAA CPL Aircraft General Knowledge Practice Questions - SACAA Commercial Pilot Licence (Aeroplane) Aircraft Technical & General Knowledge Examination Exam - SACAA CPL Aircraft General Knowledge Practice Questions - SACAA Commercial Pilot Licence (Aeroplane) Aircraft Technical & General Knowledge Examination Exam

Question 1

What is the correct operational sequence of strokes in a four-stroke internal combustion aircraft piston engine?

Induction, Compression, Power, Exhaust Induction, Power, Compression, Exhaust Compression, Induction, Power, Exhaust Power, Induction, Compression, Exhaust

Correct Answer:

Induction, Compression, Power, Exhaust

Question 2

Why are certified aero piston engines equipped with dual magneto ignition systems?

To provide safety redundancy and improve combustion efficiency through dual spark plugs To generate direct current electricity for cockpit avionics and flight instruments To allow automatic switching between high-octane and low-octane aviation gasoline To drive the hydraulic pump in the event of an engine-driven alternator failure

Correct Answer:

To provide safety redundancy and improve combustion efficiency through dual spark plugs

Question 3

What is the primary operational hazard if a magneto ground wire (P-lead) becomes disconnected or broken?

The affected magneto remains live ('hot') and can fire the spark plugs if the propeller is moved even with the ignition switch OFF The engine will immediately shut down during the pre-flight magneto check The alternator will trip off the electrical bus due to high reverse voltage spikes The engine cylinder head temperature will immediately exceed redline limits during taxi

Correct Answer:

The affected magneto remains live ('hot') and can fire the spark plugs if the propeller is moved even with the ignition switch OFF

Question 4

Which operating condition is most conducive to spark plug lead fouling in aircraft piston engines?

Extended ground idling at low RPM with an overly rich mixture Cruising at high altitude with a lean-of-peak mixture setting High power climb at full throttle with cowl flaps fully open Descent at high airspeed with low manifold pressure and high RPM

Correct Answer:

Extended ground idling at low RPM with an overly rich mixture

Question 5

How does detonation differ from pre-ignition in a four-stroke aircraft piston engine?

Detonation is uncoordinated explosive combustion of remaining fuel charge, whereas pre-ignition occurs when the mixture ignites before the normal spark Detonation is caused solely by cold engine oil, whereas pre-ignition is caused by excessive propeller blade pitch Detonation causes an immediate drop in CHT, whereas pre-ignition causes CHT to remain unchanged Detonation only occurs in diesel engines, whereas pre-ignition only occurs in gas turbine engine combustion chambers

Correct Answer:

Detonation is uncoordinated explosive combustion of remaining fuel charge, whereas pre-ignition occurs when the mixture ignites before the normal spark

Question 1

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Prepare with the SACAA CPL Aircraft General Knowledge Practice Questions - SACAA Commercial Pilot Licence (Aeroplane) Aircraft Technical & General Knowledge Examination Exam practice quiz. This question bank includes 100 questions covering engine, aircraft, fuel, piston, and propeller. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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SACAA CPL Aircraft General Knowledge Practice Questions - SACAA Commercial Pilot Licence (Aeroplane) Aircraft Technical & General Knowledge Examination Exam

This practice set contains 100 questions from the matching question bank and focuses on engine, aircraft, fuel, piston, and propeller. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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SACAA CPL Aircraft General Knowledge Practice Questions - SACAA Commercial Pilot Licence (Aeroplane) Aircraft Technical & General Knowledge Examination Exam

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