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

Question 1

The elevator moves an aeroplane around the...

Accepted Answer

Lateral axis.

Answer

Vertical axis.

Answer

Longitudinal axis.

Answer

Elevator axis.

Question 2

What engine design at a Touring Motor Glider (TMG) results in least drag?

Accepted Answer

Engine and propeller mounted stowable on the fuselage

Answer

Engine and propeller mounted fix on the fuselage

Answer

Engine and propeller mounted fix at the aircraft's nose

Answer

Engine and propeller mounted fix at the horizontal stabilizer

Question 3

What structural item provides directional stability to an airplane?

Accepted Answer

Large vertical tail

Answer

Differential aileron deflection

Answer

Wing dihedral

Answer

Large elevator

Question 4

The ratio of span and mean chord length is referred to as...

Accepted Answer

Aspect ratio.

Answer

Trapezium shape.

Answer

Tapering.

Answer

Wing sweep.

Question 5

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 6

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 7

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 8

Which statement about induced drag during the horizontal cruise flight is correct?

Accepted Answer

Induced drag decreases with increasing airspeed

Answer

Induced drag has a minimum at a certain speed and increases at higher as well as lower speeds

Answer

Induced drag has a maximum at a certain speed and decreases at higher as well as lower speeds

Answer

Induced drag increases with increasing airspeed

Question 9

What effect is referred to as "adverse yaw"?

Accepted Answer

Aileron operation results in a yaw to the opposite side due to more drag at the down-deflected aileron

Answer

Aileron operation results in a yaw to the desired side due to less drag at the down-deflected aileron

Answer

Rudder operation results in a rolling moment to the opposite side due to more lift generated by the faster moving wing.

Answer

Aileron operation results in a yaw to the opposite side due to more drag at the up-deflected aileron

Question 10

The right aileron deflects upwards, the left downwards. How does the aircraft react?

Accepted Answer

Rolling to the right, yawing to the left

Answer

Rolling to the left, no yawing

Answer

Rolling to the left, yawing to the right

Answer

Rolling to the right, yawing to the right

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

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