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

Question 1

Following a single-wing stall and pitch-down moment, how can a spin be prevented?

Accepted Answer

Rudder opposite lower wing, releasing elevator to build up speed

Answer

Deflect all rudders opposite to lower wing

Answer

Pushing the elevator to build up speed to re-attach airflow on wings

Answer

Pulling the elevator to bring the plane back to normal attitude

Question 2

Which of the listed wing shapes has the lowest induced drag?

Accepted Answer

Elliptical shape

Answer

Rectangular shape

Answer

Trapezoidal shape

Answer

Double trapezoidal shape

Question 3

The elevator moves an aeroplane around the...

Accepted Answer

Lateral axis

Answer

Vertical axis

Answer

Longitudinal axis

Answer

Elevator axis

Question 4

The angle of attack is the angle between...

Accepted Answer

The chord line and the oncoming airflow

Answer

The chord line and the longitudinal axis of an aeroplane

Answer

The wing and the fuselage of an aeroplane

Answer

The undisturbed airflow and the longitudinal axis of an aeroplane

Question 5

With regard to the forces acting, how can stationary gliding be described?

Accepted Answer

The sum of air forces compensates the gravity force

Answer

The sum of air forces acts along the direction of air flow

Answer

The sum of the air forces acts along with the lift force

Answer

The lift force compensates the drag force

Question 6

How do lift and drag change when approaching a stall condition?

Accepted Answer

Lift decreases and drag increases

Answer

Lift and drag increase

Answer

Lift increases and drag decreases

Answer

Lift and drag decrease

Question 7

What leads to a decreased stall speed Vs (IAS)?

Accepted Answer

Decreasing weight

Answer

Lower density

Answer

Lower altitude

Answer

Higher load factor

Question 8

What has to be considered when operating a sailplane equipped with camber flaps?

Accepted Answer

During approach and landing, camber must not be changed from positive to negative

Answer

During approach and landing, camber must not be changed from negative to positive

Answer

During winch launch, camber must be set to full negative

Answer

During winch launch, camber must be set to full positive

Question 9

What describes "wing loading"?

Accepted Answer

Weight per wing area

Answer

Wing area per weight

Answer

Drag per weight

Answer

Drag per wing area

Question 10

What has to be considered when operating a sailplane with water ballast?

Accepted Answer

It should stay below freezing level

Answer

Best glide angle decreases

Answer

Significant CG shifts

Answer

Best glide speed decreases

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

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