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Home > Training for exam quizzes ATPL, PPL(A), PPL(H), BPL Hot Air, BPL Gas, SPL - Sailplane, EASA Drone > Principles of Flight (Helicopter) - PPL(H) - Private Pilot License

Quiz Principles of Flight (Helicopter) - PPL(H) - Private Pilot License

Test 10 Questions PPL(H) - Private Pilot License - Principles of Flight (Helicopter), no time limit

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1 - What action has no effect on the rotor RPM in an autorotation? Utilisation of friction brake. Centre of gravity displacement. Pitch angle change. Transition into a turning flight.

2 - Why do helicopters with a semi-rigid rotor system react slower than others? The central flapping hinge does not transmit any moments The missing lag hinges cause a rotor imbalance The lowered attachment of the rotor blades allows a transmission of forces The angled lag hinges prevent the transmission of aerodynamic forces on the helicopter frame

3 - The effective airflow velocity of a rotor blade element varies with the distance from the rotor shaft axis, because the... Peripheral speed increases if the displacement to the rotor blade tip decreases- Helicopter airframe disturbs the airflow. Tangential force and airflow reversal vary. Drag force in direction of the rotaion axis is increased.

4 - The induced airflow on the rotor of a helicopter in level flight has the greatest value at the... Rear rotor area. Advancing rotor blade. Retreating rotor blade. Front rotor area.

5 - The airframe of an accelerating helicopter continues to bend until the... Horizontal thrust component equals the drag. Thrust passes in front of the centre of gravity. Vertical thrust component equals the drag. Thrust passes behind the centre of gravity.

6 - The rotor RPM is kept constant in the helicopter by the engine RPM. It can be influenced by the... Cyclic stick. Throttle and the governor. Starter and the impulse coupling. Collective.

7 - The drive system of the autogyro's main rotor is based on... The speed of the airflow. A fan in the cabin. An engine in the cabin. An engine at the rotor blade tip

8 - Which ratio corresponds to the rotor disc loading? Rotor disc / helicopter mass Rotor thrust / rotor disc Rotor thrust / rotor disc Helicopter mass / rotor disc

9 - What is the result of the vortex ring state? The helicopter is more stable The helicopter loses power The sink rate increases uncontrollably The rotor RPM increases

10 - The maximum range in an autorotation will be achieved by... A relatively low effective angle of attack. A neutral effective angle of attack. A relatively high effective angle of attack. A negative effective angle of attack.

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