Aircraft General Knowledge - PPL(H) - Private Pilot License

Question 1

Piston engines of helicopters have...

Accepted Answer

Two independent ignition systems.

Answer

One magneto ignition system.

Answer

Two coupled ignition systems.

Answer

One electrical ignition system.

Question 2

The term "inclination" is defined as...

Accepted Answer

Angle between earth's magnetic field lines and horizontal plane.

Answer

Angle between magnetic and true north.

Answer

Deviation induced by electrical fields.

Answer

Angle between airplane's longitudinal axis and true north.

Question 3

Which components do rotor blades made of wood contain?

Accepted Answer

Spar of metal, filling material of wood and erosion protection of metal

Answer

Spar of wood, filling material of plastic, and outer skin of wood

Answer

Spar of wood, filling material of wood, and outer skin of plastic

Answer

Spar of metal, filling material of metal, and erosion protection of wood

Question 4

What is the advantage of a gyrodyne compared to a helicopter?

Accepted Answer

High airspeed in cruise

Answer

Large centre of gravity limits

Answer

No gearbox is necessary

Answer

Low fuel consumption

Question 5

What needs to be considered if permissible limitations were exceeded?

Accepted Answer

The helicopter must be inspected by a qualified engineer before the next flight

Answer

The helicopter must be subjected to a duplicate inspected by two engineers

Answer

The helicopter must be inspected by the pilot in command and if no defect is found, no appropriate entry in the aircraft technical log is necessary

Answer

The helicopter must be inspected by at least two pilots licensed on the type, one of whom must be the pilot in command

Question 6

What has to be considered during refueling?

Accepted Answer

No open fires, obey smoking ban and apply ground cables

Answer

Apply ground wires, turn on the main switch and magneto ignition

Answer

Check the fuel content of the tank with a torch and remove fire protection

Answer

Refuel through a soaked rag and keep a fire extinguisher available

Question 7

Which of the following states the working principle of an airspeed indicator?

Accepted Answer

Total air pressure is measured and compared against static air pressure.

Answer

Dynamic air pressure is measured by the Pitot tube and converted into a speed indication by the airspeed indicator

Answer

Total air pressure is measured by the static ports and converted into a speed indication by the airspeed indicator

Answer

Static air pressure is measured and compared against a vacuum.

Question 8

The measurement of altitude is based on the change of the...

Accepted Answer

Static pressure.

Answer

Dynamic pressure.

Answer

Total pressure.

Answer

Differential pressure.

Question 9

A spider control...

Accepted Answer

Changes the pitch angle of the rotor blades via an internal control rod.

Answer

Feeds fuel by the rotational movement of pistons with various lengths.

Answer

Prevents the overlay of collective and periodic control inputs on the main rotor.

Answer

Changes the ignition timing of the magneto ignition during start-up.

Question 10

Which part of the cycle of a four-stroke Otto engine can be seen in the attachment? See figure (AGK-008) Siehe Anlage 2

Accepted Answer

Second stroke - compression

Answer

First stroke - induction

Answer

Third stroke - power

Answer

Fourth stroke - exhaust

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