100+ Free NCAA PPL Aircraft General Knowledge Practice Questions

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2026 Statistics

Key Facts: NCAA PPL Aircraft General Knowledge Exam

30 Q

Exam Questions

NCAA Nig. CARs Part 2

60 Min

Time Limit

NCAA Schedule

75%

Pass Mark

Nig. CARs Part 2

~₦40,000

Exam Fee

NCAA Licensing

Dual

Magneto Ignition

PPL AGK Standard

100LL

Blue Avgas Standard

ASTM D910

NCAA PPL AGK is a 30 MCQ, 60-minute examination requiring a 75% pass mark, covering aircraft structures, piston engines, magnetos, carburetors, electrical systems, and flight instruments.

Sample NCAA PPL Aircraft General Knowledge Practice Questions

Try these sample questions to test your NCAA PPL Aircraft General Knowledge exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1What is the primary structural function of an aircraft fuselage?

A.To house the flight crew, passengers, and cargo while attaching structural components like wings and empennage.

B.To generate the majority of aerodynamic lift required for sustained horizontal flight.

C.To house the main landing gear oleo struts and act as the primary engine mount.

D.To balance gyroscopic forces produced by the engine propeller during flight maneuvers.

Explanation: The fuselage is the main body structure of an aircraft. Its main functions are to accommodate payload (crew, passengers, cargo/baggage) and to serve as the structural central body to which the wings, tail assembly (empennage), and landing gear are attached.

2How does a semi-monocoque fuselage structure differ from a true monocoque structure?

A.Semi-monocoque relies on internal longerons and stringers to reinforce the thin outer metal skin.

B.Semi-monocoque uses a completely hollow skin with no internal bulkheads or formers whatsoever.

C.Semi-monocoque is constructed entirely of welded steel tubing without any external skin.

D.Semi-monocoque uses composite fabrics exclusively without any metallic structural fasteners.

Explanation: A monocoque structure relies primarily on its outer skin to carry structural loads. A semi-monocoque structure adds longitudinal members (longerons and stringers) and vertical members (bulkheads and formers) to reinforce the skin, preventing premature skin buckling under load.

3What is the primary structural function of spars within an aircraft wing assembly?

A.To act as the main longitudinal structural members carrying bending loads along the wingspan.

B.To form the aerodynamic camber profile of the wing and transmit skin loads to the fuselage.

C.To house the fuel tanks and prevent sloshing of fuel during steep turn maneuvers.

D.To connect the aileron push-pull rods to the cockpit control column.

Explanation: Spars are the principal structural members of the wing. They run longitudinally from the wing root to the wingtip and absorb the major bending loads imposed on the wing during flight and landing.

4What is the primary role of wing ribs in a conventional aircraft wing?

A.To give the wing its cambered aerodynamic profile and transfer skin loads to the spars.

B.To carry the full torsional twist load of the wingtip during high-speed dives.

C.To attach the main wing assembly directly to the aircraft fuselage carry-through fitting.

D.To act as electrical ground paths for the wing navigation lighting systems.

Explanation: Wing ribs are installed chordwise across the wing. They shape the wing into the desired airfoil profile (camber) and transfer aerodynamic pressure loads from the outer skin to the main structural spars.

5Which group of components represents the primary flight control surfaces of a light aircraft?

A.Ailerons, Elevators, and Rudder.

B.Flaps, Trim Tabs, and Slats.

C.Spoilers, Airbrakes, and Servo Tabs.

D.Stabilators, Ground Spoilers, and Leading Edge Darts.

Explanation: The primary flight control surfaces are the ailerons (roll around longitudinal axis), elevators (pitch around lateral axis), and rudder (yaw around vertical axis). Secondary controls include flaps, trim tabs, and spoilers.

6Movement of the cockpit control stick or column forward and aft controls which surface around which axis?

A.Elevator around the lateral axis.

B.Ailerons around the longitudinal axis.

C.Rudder around the vertical axis.

D.Trim tab around the normal axis.

Explanation: Forward and aft movement of the control column moves the elevator (or stabilator), causing pitch motion of the aircraft around its lateral axis.

7Rotating the cockpit control wheel or moving the stick side-to-side operates which flight controls to cause roll?

A.Ailerons around the longitudinal axis.

B.Rudder around the vertical axis.

C.Elevators around the lateral axis.

D.Flaps around the transversal axis.

Explanation: Side-to-side control stick displacement or control wheel rotation deflects the ailerons differentially, producing roll movement around the aircraft longitudinal axis.

8Pressing the right rudder pedal causes the rudder to move in which direction, resulting in what aircraft motion?

A.Rudder moves to the right, causing the nose to yaw to the right around the vertical axis.

B.Rudder moves to the left, causing the nose to yaw to the right around the lateral axis.

C.Rudder moves to the right, causing the aircraft to roll to the right around the longitudinal axis.

D.Rudder moves upward, causing the nose to pitch up around the lateral axis.

Explanation: Pressing the right rudder pedal deflects the rudder surface to the right. Aerodynamic force on the trailing edge pushes the tail to the left, causing the nose to yaw to the right around the vertical (normal) axis.

9What is the primary purpose of an elevator trim tab on a light aircraft?

A.To relieve continuous control pressure exerted by the pilot on the control column during steady flight.

B.To increase maximum wing lift during short-field takeoff and landing operations.

C.To lock the control column securely when the aircraft is parked on the ramp.

D.To automatically correct for propeller torque without pilot intervention.

Explanation: The elevator trim tab creates a small aerodynamic force that holds the primary control surface in a deflected position, relieving the pilot from holding continuous force on the control column.

10How does an anti-servo tab function on an all-movable tailplane (stabilator)?

A.It moves in the same direction as the trailing edge of the stabilator to provide tactile control feel and stability.

B.It moves in the opposite direction of the stabilator to reduce pilot control column forces to zero.

C.It automatically retracts when airspeed exceeds cruising velocity to prevent structural flutter.

D.It operates only when flaps are extended to counteract flap-induced nose-down pitching moments.

Explanation: Because a stabilator is hinged near its center of lift, it can be extremely sensitive. An anti-servo tab deflects in the SAME direction as the trailing edge of the stabilator, generating a force that resists pilot input and provides feedback force (feel) and longitudinal stability.

About the NCAA PPL Aircraft General Knowledge Exam

The NCAA PPL Aircraft General Knowledge examination evaluates a pilot candidate's understanding of light aircraft construction, piston engines, electrical circuits, fuel/ignition systems, and pitot-static and gyroscopic flight instruments under Nigeria Civil Aviation Regulations (Nig. CARs) Part 2.

Assessment

30 MCQs covering Airframe (20%), Engines & Lubrication (25%), Ignition & Fuel (20%), Electrical (15%), and Instruments (20%).

Time Limit

60 minutes

Passing Score

75%

Exam Fee

₦20,000 (Nigeria Civil Aviation Authority (NCAA))

NCAA PPL Aircraft General Knowledge Exam Content Outline

20%

Airframe Structures & Control Surfaces

Fuselage types, wing construction, tailplane components, primary/secondary control surfaces, and structural loads.

25%

Piston Engine Operations & Lubrication

Four-stroke cycle principles, valve timing, cooling systems, oil viscosity, oil pressure gauges, and engine operating limits.

20%

Ignition & Fuel Systems

Magneto dual ignition operation, spark plug gap and fouling, float carburetors, mixture control, carburetor ice formation, and fuel venting.

15%

Electrical Systems

Direct current electrical systems, alternators, batteries, ammeter indications, circuit breakers, and electrical system failures.

20%

Flight & Gyroscopic Instruments

Pitot-static instruments (altimeter, airspeed indicator, VSI) and vacuum/gyroscopic instruments (turn coordinator, attitude indicator, directional gyro).

How to Pass the NCAA PPL Aircraft General Knowledge Exam

What You Need to Know

Passing score: 75%
Assessment: 30 MCQs covering Airframe (20%), Engines & Lubrication (25%), Ignition & Fuel (20%), Electrical (15%), and Instruments (20%).
Time limit: 60 minutes
Exam fee: ₦20,000

Keys to Passing

Complete 500+ practice questions
Score 80%+ consistently before scheduling
Focus on highest-weighted sections
Use our AI tutor for tough concepts

NCAA PPL Aircraft General Knowledge Study Tips from Top Performers

1Understand the four strokes of a piston engine: Intake, Compression, Power, and Exhaust.

2Memorize the color codes for aviation fuel grades (AVGAS 100LL is blue, AVGAS 100 is green, Jet A-1 is clear/straw).

3Learn the blockage symptoms of pitot and static vents for all three pitot-static instruments.

4Understand how gyroscopic rigidity in space and precession drive the turn coordinator, attitude indicator, and directional gyro.

5Know the difference between zero-center ammeters and load meters in aircraft electrical systems.

6Practice solving scenario questions on carburetor heating during descent and low power settings.

Frequently Asked Questions

What is the pass mark for the NCAA PPL Aircraft General Knowledge exam?

The minimum passing score is 75% as prescribed by the Nigeria Civil Aviation Authority under Nig. CARs Part 2.

How many questions are on the official NCAA PPL AGK exam and what is the time limit?

The exam consists of 30 multiple-choice questions with a time limit of 60 minutes.

Why do aircraft engines use dual magneto ignition systems?

Dual magnetos provide redundancy for safety and improve combustion efficiency by igniting the air-fuel mixture from two spark plugs per cylinder.

What causes carburetor icing in light aircraft piston engines?

Carburetor icing occurs due to fuel vaporization and air pressure drop in the venturi, causing moisture to freeze even at ambient temperatures as high as 20°C to 30°C.

Which instruments are connected to the pitot-static system?

The Airspeed Indicator (ASI) uses both pitot and static pressure, while the Altimeter and Vertical Speed Indicator (VSI) use static pressure only.

100+ Free NCAA PPL Aircraft General Knowledge Practice Questions

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