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

Question 1

What is the function of the static rudder balance?

Accepted Answer

To prevent control surface flutter

Answer

To trim the controls almost without any force

Answer

To increase the control stick forces

Answer

To limit the control stick forces

Question 2

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 3

Deflecting the rudder to the left causes...

Accepted Answer

Yawing of the aircraft to the left

Answer

Pitching of the aircraft to the left

Answer

Pitching of the aircraft to the right

Answer

Yawing of the aircraft to the right

Question 4

The aerodynamic rudder balance...

Accepted Answer

Reduces the control stick forces

Answer

Reduces the control surfaces

Answer

Delays the stall

Answer

Improves the rudder effectiveness

Question 5

Rotation around the lateral axis is called...

Accepted Answer

Pitching

Answer

Yawing

Answer

Rolling

Answer

Stalling

Question 6

If surrounded by airflow (v > 0), any arbitrarily shaped body produces...

Accepted Answer

Drag

Answer

Drag and lift

Answer

Lift without drag.

Answer

Constant drag at any speed

Question 7

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 8

Where is interference drag generated?

Accepted Answer

At the wing root

Answer

At the ailerons

Answer

At the gear

Answer

Near the wing tips

Question 9

What is the advantage of differential aileron movement?

Accepted Answer

The drag of the downwards deflected aileron is lowered and the adverse yaw is smaller

Answer

The total lift remains constant during aileron deflection

Answer

The ratio of the drag coefficient to lift coefficient is increased

Answer

The adverse yaw is higher

Question 10

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

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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