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

Question 1

What structural item provides lateral stability to an aeroplane?

Accepted Answer

Wing dihedral

Answer

Vertical tail

Answer

Differential aileron deflection

Answer

Elevator

Question 2

Number 2 in the drawing corresponds to the... See figure (PFA-010)

Accepted Answer

Chord line

Answer

Profile thickness

Answer

Chord

Answer

Angle of attack

Question 3

What is the function of the horizontal tail (among other things)?

Accepted Answer

To stabilise the aeroplane around the lateral axis

Answer

To stabilise the aeroplane around the longitudinal axis

Answer

To initiate a curve around the vertical axis

Answer

To stabilise the aeroplane around the vertical axis

Question 4

The drag coefficient...

Accepted Answer

Cannot be lower than a non-negative, minimal value

Answer

Is proportional to the lift coefficient

Answer

Increases with increasing airspeed

Answer

May range from zero to an infinite positive value

Question 5

Which point on the aerofoil is represented by number 3? See figure (PFA-009)

Accepted Answer

Transition point

Answer

Stagnation point

Answer

Separation point

Answer

Centre of pressure

Question 6

In order to improve the stall characteristics of an aircraft, the wing is twisted outwards (the angle of incidence varies spanwise). This is known as...

Accepted Answer

Geometric washout

Answer

Arrow shape

Answer

V-form

Answer

Aerodynamic washout

Question 7

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 8

All aerodynamic forces can be considered to act on a single point. This point is called...

Accepted Answer

Centre of pressure

Answer

Centre of gravity

Answer

Lift point

Answer

Transition point

Question 9

Which statement concerning the angle of attack is correct?

Accepted Answer

A too large angle of attack may result in a loss of lift

Answer

Increasing the angle of attack results in decreasing lift

Answer

The angle of attack cannot be negative

Answer

The angle of attack is constant throughout the flight

Question 10

When increasing the airflow speed by a factor of 2 while keeping all other parameters constant, how does the parasite drag change approximately?

Accepted Answer

It increases by a factor of 4

Answer

It decreases by a factor of 2

Answer

It increases by a factor of 2

Answer

It decreases by a factor of 4

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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