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

Question 1

A sailplane is operated with additional water ballast. How do best gliding angle and speed of best glide change, when compared to flying without water ballast?

Accepted Answer

Best gliding angle remains unchanged, best glide speed increases

Answer

Best gliding angle decreases, best glide speed decreases

Answer

Best gliding angle remains increases, best glide speed increases

Answer

Best gliding angle remains unchanged, best glide speed decreases

Question 2

Extending airbrakes results in ...

Accepted Answer

More drag and less lift

Answer

Less drag and more lift

Answer

More drag and more lift

Answer

Less drag and less lift

Question 3

What is shown by a profile polar?

Accepted Answer

Ratio of cA and cD at different angles of attack

Answer

Ratio between minimum rate of descent and best glide

Answer

Ratio between total lift and drag depending on angle of attack

Answer

Lift coefficient cA at different angles of attack

Question 4

What types of boundary layers can be found on an aerofoil?

Accepted Answer

Laminar layer at the leading wing areas, turbulent boundary layer at the trailing areas

Answer

Laminar boundary layer along the complete upper surface with non-separated airflow

Answer

Turbulent layer at the leading wing areas, laminar boundary layer at the trailing areas

Answer

Turbulent boundary layer along the complete upper surface with separated airflow

Question 5

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 6

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 7

Pressure compensation on a wing occurs at the...

Accepted Answer

Wing tips

Answer

Leading edge

Answer

Trailing edge

Answer

Wing roots

Question 8

The laminar boundary layer on the aerofoil is located between...

Accepted Answer

The stagnation point and the transition point

Answer

The stagnation point and the centre of pressure

Answer

The transition point and the separation point

Answer

The transition point and the centre of pressure

Question 9

The centre of pressure is the theoretical point of origin of...

Accepted Answer

All aerodynamic forces of the profile

Answer

Only the resulting total drag

Answer

Gravity forces of the profile

Answer

Gravity and aerodynamic forces

Question 10

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

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

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

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

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

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