Principles of Flight (Aeroplane) - SPL - Sailplane Pilot License

Question 1

How does a laminar boundary layer differ from a turbulent boundary layer?

Accepted Answer

The turbulent boundary layer can follow the airfoil camber at higher angles of attack

Answer

The laminar boundary layer is thinner and provides more skin-friction drag

Answer

The laminar boundary layer produces lift, the turbulent boundary layer produces drag

Answer

The turbulent boundary layer is thicker and provides less skin-friction drag

Question 2

What pattern can be found at the stagnation point?

Accepted Answer

Streamlines are divided into airflow above and below the profile

Answer

The boundary layer starts separating on the upper surface of the profile

Answer

All aerodynamic forces can be considered as attacking at this single point

Answer

The laminar boundary layer changes into a turbulent boundary layer

Question 3

Through which factor listed below does the load factor increase during cruise flight?

Accepted Answer

An upward gust

Answer

Lower air density

Answer

A forward centre of gravity

Answer

Higher aeroplane weight

Question 4

Number 3 in the drawing corresponds to the... See figure (PFA-010) Siehe Anlage 1

Accepted Answer

Camber line.

Answer

Thickness.

Answer

Chord.

Answer

Chord line.

Question 5

Which parts of an aircraft mainly affect the generation of induced drag?

Accepted Answer

The wing tips.

Answer

The front part of the fuselage.

Answer

The outer part of the ailerons.

Answer

The lower part of the gear.

Question 6

In case of a stall it is important to...

Accepted Answer

Decrease the angle of attack and increase the speed.

Answer

Increase the angle of attack and increase the speed.

Answer

Increase the angle of attack and reduce the speed.

Answer

Increase the bank angle and reduce the speed.

Question 7

Pressure compensation on an wing occurs at the...

Accepted Answer

Wing tips.

Answer

Leading edge.

Answer

Trailing edge.

Answer

Wing roots

Question 8

Differential aileron deflection is used to...

Accepted Answer

Keep the adverse yaw low.

Answer

Reduce wake turbulence.

Answer

Avoid a stall at low angles of attack.

Answer

Increase the rate of descent.

Question 9

The angle (alpha) shown in the figure is referred to as... See figure (PFA-003) DoF: direction of airflow Siehe Anlage 3

Accepted Answer

Angle of attack.

Answer

Lift angle.

Answer

Angle of incidence.

Answer

Angle of inclination

Question 10

Which design feature can compensate for adverse yaw?

Accepted Answer

Differential aileron defletion

Answer

Which design feature can compensate for adverse yaw?

Answer

Full deflection of the aileron

Answer

Wing dihedral

Quiz Principles of Flight (Aeroplane) - SPL - Sailplane Pilot License

Test 10 Questions SPL - Sailplane Pilot License - Principles of Flight (Aeroplane), no time limit