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

Question 1

The glide ratio of a sailplane can be improved by which measures?

Accepted Answer

Cleaning, correct speed, retractable gear, taped gaps between wing and fuselage

Answer

Higher airplane mass, thin airfoil, taped gaps between wing and fuselage

Answer

Lower airplane mass, correct speed, retractable gear

Answer

Forward C.G. position, correct speed, taped gaps between wing and fuselage

Question 2

Which point on the aerofoil is represented by number 3? See figure (PFA-009) Siehe Anlage 2

Accepted Answer

Transition point

Answer

Stagnation point

Answer

Separation point

Answer

Center of pressure

Question 3

Which statement about the airflow around an aerofoil is correct if the angle of attack decreases?

Accepted Answer

The center of pressure moves aft

Answer

The center of pressure moves forward

Answer

The stagnation point moves down

Answer

The stagnation point remains constant

Question 4

Which statement about the airflow around an aerofoil is correct if the angle of attack increases?

Accepted Answer

The stagnation point moves down

Answer

The center of pressure moves down

Answer

The center of pressure moves up

Answer

The stagnation point moves up

Question 5

At stationary glide and the same mass, what is the difference when using a thick airfoild instead of a thinner airfoil?

Accepted Answer

More drag, same lift

Answer

Less drag, less lift

Answer

More drag, less lift

Answer

Less drag, same lift

Question 6

Which statement regarding a spin is correct?

Accepted Answer

During recovery the ailerons should be kept neutral

Answer

During the spin the speed constantly increases

Answer

During recovery the ailerons should be crossed

Answer

Only very old aeroplanes have a risk of spinning

Question 7

In which way does the position of the center of pressure move at a positively shaped profile with increasing angle of attack?

Accepted Answer

It moves forward until reaching the critical angle of attack

Answer

It moves to the wing tips

Answer

It moves forward first, then backward

Question 8

The critical angle of attack...

Accepted Answer

Is not changed by different aircraft weights.

Answer

Increases with a front centre of gravity

Answer

Is changed by different aircraft weights.

Answer

Decreases with a rear centre of gravity.

Question 9

Pressure drag, interference drag and friction drag belong to the group of the...

Accepted Answer

Parasite drag

Answer

Main resistance.

Answer

Induced drag.

Answer

Total drag.

Question 10

Which statement about lift and angle of attack is correct?

Accepted Answer

Increasing the angle of attack too far may result in a loss of lift and an airflow separation

Answer

Increasing the angle of attack results in less lift being generated by the aerofoil

Answer

Decreasing the angle of attack results in more drag being generated by the aerofoil

Answer

Too large angles of attack can lead to an exponential increase in lift

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

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