Free Practice Questions for PPL(H) AGK Helicopter

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Sample PPL(H) AGK Helicopter Practice Questions

Try these sample questions to review concepts for the PPL(H) AGK Helicopter exam. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1What is the primary function of a helicopter freewheel unit (overrunning clutch)?

A.To disconnect the rotor system from the engine in the event of an engine failure or during autorotation

B.To lock the main rotor blades during high-speed engine start

C.To automatically adjust tail rotor pitch in response to main rotor torque changes

D.To vary the engine idle speed during ground warming up

Explanation: The freewheel unit automatically disengages the main rotor system from the engine whenever engine RPM drops below rotor RPM. This allows the rotor system to continue rotating freely during an engine failure or autorotation.

2On a standard helicopter dual-needle tachometer, what do the two needles indicate?

A.Main Rotor RPM (R) and Engine RPM (E)

B.Main Rotor RPM and Tail Rotor RPM

C.Engine RPM and Transmission Oil Pressure

D.Airspeed and Rotor RPM

Explanation: The dual-needle tachometer features two coaxial needles labeled 'R' for Rotor RPM and 'E' for Engine RPM. During normal powered flight, the needles are joined (superimposed).

3What type of rotor hub allows individual main rotor blades to flap, drag (lead-lag), and feather?

A.Fully articulated rotor hub

B.Teetering (semirigid) rotor hub

C.Rigid rotor hub without any hinges

D.Single-blade counterweighted rotor hub

Explanation: A fully articulated rotor hub features independent mechanical hinges for each blade: a flapping hinge for up/down movement, a lead-lag (drag) hinge for fore/aft movement, and a feathering hinge for pitch changes.

4Why is a clutch necessary between the engine and the main rotor system in a piston-engine helicopter?

A.To allow the piston engine to be started without the heavy load of the rotor system

B.To prevent the main rotor from exceeding its maximum continuous airspeed

C.To reduce vibration during high-speed forward flight

D.To convert engine rotary motion into hydraulic pressure

Explanation: Piston engines produce relatively low starting torque and cannot start easily under the heavy inertia load of main rotor blades. The clutch permits the engine to start disengaged and gradually engage the rotor.

5What engine parameter is displayed on the Manifold Pressure (MAP) gauge in a piston-engine helicopter?

A.The absolute pressure of the fuel-air mixture in the engine intake manifold

B.The exhaust gas pressure leaving the engine cylinder heads

C.The hydraulic pressure supplied to the main rotor actuators

D.The pressure inside the main transmission lubrication sump

Explanation: The Manifold Pressure gauge measures the absolute pressure inside the engine induction manifold downstream of the throttle valve, expressed in inches of mercury (inHg). It directly reflects engine power output.

6In a two-bladed teetering (semirigid) rotor system, how do the blades move when one blade flaps upward?

A.The opposite blade flaps downward by an equal amount around the central trunnion

B.The opposite blade also flaps upward to maintain rotor disc symmetry

C.Both blades lag backward simultaneously due to drag

D.The rotor head automatically disconnects from the drive shaft

Explanation: A teetering rotor acts like a see-saw. When one blade flaps upward due to increased lift, the teetering hinge forces the opposite blade to flap downward by the exact same amount.

7What is the primary function of the tail rotor on a single main rotor helicopter?

A.To counteract main rotor torque reaction and provide directional (yaw) control

B.To provide additional forward thrust during cruise flight

C.To balance the vertical pitch axis during autorotation descent

D.To prevent low-G mast bumping during steep turns

Explanation: According to Newton's third law, turning the main rotor creates an equal and opposite torque reaction on the fuselage. The tail rotor produces horizontal thrust to offset this torque and control yaw.

8Which instrument relies on both pitot and static pressure sources?

A.Airspeed Indicator (ASI)

B.Altimeter

C.Vertical Speed Indicator (VSI)

D.Attitude Indicator (AI)

Explanation: The Airspeed Indicator measures dynamic pressure, which is the difference between total pitot (impact) pressure and static ambient pressure.

9What is the function of a swashplate assembly in a helicopter flight control system?

A.To translate stationary pilot control inputs into rotating main rotor blade pitch changes

B.To automatically balance fuel transfer between left and right fuselage tanks

C.To regulate oil flow to the main gearbox epicyclic reduction gears

D.To measure main rotor shaft torque and transmit data to the cockpit

Explanation: The swashplate consists of a stationary disc connected to pilot flight controls and a rotating disc connected to rotor blade pitch horns, transferring control inputs from stationary airframe to rotating blades.

10In a turboshaft engine, what does the N1 (or Ng) gauge monitor?

A.The rotational speed of the gas generator (compressor) spool as a percentage of maximum RPM

B.The rotational speed of the free power turbine supplying drive to the transmission

C.The main rotor disc angular velocity

D.The electrical alternator output frequency

Explanation: N1 (or Ng) measures the gas generator spool speed (compressor and high-pressure turbine), indicating the core engine thermal power production.

About the PPL(H) AGK Helicopter Exam

UK CAA PPL(H) AGK tests helicopter structures, rotor hub design, piston/turbine powerplants, drive transmissions, and flight instruments for private helicopter pilot candidates. Exam includes 20 MCQs with a 75% pass mark.

Exam sponsor: UK Civil Aviation Authority (CAA). The requirements and fees below concern the certification or admission exam, separate from our free practice resources.

Questions

20 questions

Time Limit

45 minutes

Passing Score

75%

Exam / Certification Fees

£50

Exam sponsor website

Fees, eligibility, and exam policies can change. Confirm them with the exam sponsor before applying or paying.

Official sources

UK Civil Aviation Authority (CAA): official exam information

Our practice resources: topics covered

We aim to reflect publicly available exam outlines and topic information in our study resources. Coverage, format, and difficulty may differ from the actual exam, and we cannot guarantee that every detail is accurate or current. Confirm exam requirements, fees, and policies with the official exam sponsor.

50%

Core Knowledge & Regulations

Fundamental principles, laws, and operating requirements.

50%

Applied Systems & Calculations

Practical application, calculations, and maintenance procedures.

Preparing for the PPL(H) AGK Helicopter Exam

What You Need to Know

Passing score: 75%
Exam length: 20 questions
Time limit: 45 minutes
Exam / certification fees: £50 Official sources

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PPL(H) AGK Helicopter: Suggested Study Strategy

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Frequently Asked Questions

What is the pass mark for PPL(H) AGK Helicopter?

The pass mark required by the UK CAA is 75%.