Question 1

What type of airfoil is most efficient for low-speed aeroplanes?

Accepted Answer

Thick airfoil

Answer

Thin airfoil

Answer

Symmetrical airfoil

Answer

Reflex trailing edge airfoil

Question 2

What type of airfoil is best for high-speed aeroplanes?

Accepted Answer

Thin airfoil

Answer

GA(W)-1 airfoil

Answer

Thick airfoil

Answer

Deep camber airfoil

Question 3

What does the term "planform" refer to?

Accepted Answer

The shape of the wing as seen from directly above

Answer

The angle of incidence of the wing

Answer

The spar location in the wing

Answer

The thickness of the airfoil

Question 4

How is the aspect ratio of a wing calculated?

Accepted Answer

By dividing the span by the average chord

Answer

By dividing the chord by the span

Answer

By dividing the lift by the drag

Answer

By dividing the wing area by the chord

Question 5

What is the angle of incidence?

Accepted Answer

The angle at which the wing is permanently inclined to the longitudinal axis of the aeroplane

Answer

The angle between the wing and the horizontal datum line

Answer

The angle of airflow over the wing

Answer

The angle of attack during take-off

Question 6

Why do most modern aeroplanes have a small positive angle of incidence?

Accepted Answer

To optimize cruising flight

Answer

To increase lift during take-off

Answer

To reduce drag during landing

Answer

To improve stall characteristics

Question 7

What is the purpose of winglets?

Accepted Answer

To inhibit vortex development and reduce induced drag

Answer

To improve lateral control during turns

Answer

To increase the wing's camber

Answer

To increase the wing's aspect ratio

Question 8

What is the function of droop wing tips?

Accepted Answer

To decrease vortex development

Answer

To reduce drag during level flight

Answer

To increase lift during take-off

Answer

To improve stall characteristics

Question 9

What is wash-out and what does it achieve?

Accepted Answer

Decreasing the angle of incidence at the wing tip to improve stall characteristics

Answer

Increasing the angle of incidence at the wing tip to improve lift

Answer

Decreasing the camber of the wing tip to reduce drag

Answer

Increasing the camber of the wing root to improve stability

Question 10

What are slats and where are they located?

Accepted Answer

Auxiliary airfoils fitted to the leading edge of the wing

Answer

Passageways built into the wing root

Answer

Auxiliary airfoils fitted to the trailing edge of the wing

Answer

Hinged flaps located on the tailplane

Question 11

What is the purpose of slots in a wing?

Accepted Answer

To smooth out turbulence at high angles of attack

Answer

To reduce induced drag during level flight

Answer

To improve lateral control during turns

Answer

To increase drag during landing

Question 12

What is the primary function of spoilers?

Accepted Answer

To increase drag and decrease lift

Answer

To improve stall characteristics

Answer

To increase lift during take-off

Answer

To reduce vortex development

Question 13

How can spoilers assist during landing?

Accepted Answer

By destroying lift and transferring weight to the wheels for effective braking

Answer

By increasing lift for a smoother touchdown

Answer

By reducing drag for a faster landing roll

Answer

By improving lateral control during crosswinds

Question 14

How do flaps affect the wing during take-off and landing?

Accepted Answer

They increase camber and allow a build-up of pressure below the wing

Answer

They reduce vortex development and improve lateral control

Answer

They decrease camber and reduce drag

Answer

They increase the angle of incidence and improve stall characteristics

Question 15

Which type of flap is considered the most aerodynamically efficient?

Accepted Answer

Fowler flap

Answer

Conventional flap

Answer

Slotted flap

Answer

Split flap

Question 16

What is movement around the longitudinal axis called, and which control surface manages it?

Accepted Answer

Roll; controlled by ailerons

Answer

Yaw; controlled by rudder

Answer

Pitch; controlled by elevators

Answer

Glide; controlled by flaps

Question 17

What is movement around the lateral axis called, and which control surface manages it?

Accepted Answer

Pitch; controlled by elevators

Answer

Yaw; controlled by rudder

Answer

Glide; controlled by flaps

Answer

Roll; controlled by ailerons

Question 18

What is movement around the vertical axis called, and which control surface manages it?

Accepted Answer

Yaw; controlled by rudder

Answer

Roll; controlled by ailerons

Answer

Glide; controlled by flaps

Answer

Pitch; controlled by elevators

Question 19

What is static stability?

Accepted Answer

The initial tendency of an aeroplane to return to its original position after a disturbance

Answer

The tendency of an aeroplane to remain in a sideslip condition

Answer

The tendency of an aeroplane to stall after a disturbance

Answer

The tendency of an aeroplane to oscillate indefinitely after a disturbance

Question 20

What is dynamic stability?

Accepted Answer

The tendency of an aeroplane to return to its original position after oscillations

Answer

The tendency of an aeroplane to oscillate indefinitely after a disturbance

Answer

The tendency of an aeroplane to stall after a disturbance

Answer

The tendency of an aeroplane to remain in a sideslip condition

Question 21

What happens to an aeroplane with negative stability?

Accepted Answer

It oscillates with increasing movements and may eventually stall or dive

Answer

It automatically corrects its attitude without pilot input

Answer

It remains in its disturbed position without moving further away

Answer

It returns to its original position after a disturbance

Question 22

What is longitudinal stability?

Accepted Answer

Stability around the lateral axis

Answer

Stability around the longitudinal axis

Answer

Stability around the diagonal axis

Answer

Stability around the vertical axis

Question 23

How is longitudinal stability achieved?

Accepted Answer

By ensuring the centre of gravity is ahead of the centre of pressure

Answer

By ensuring the centre of gravity is behind the centre of pressure

Answer

By reducing the sweepback of the wings

Answer

By increasing the dihedral angle of the wings

Question 24

What is the function of the horizontal stabilizer?

Accepted Answer

To resist the nose-heavy tendency of the aeroplane

Answer

To improve lateral stability

Answer

To reduce drag during level flight

Answer

To increase lift during take-off

Question 25

What is lateral stability?

Accepted Answer

Stability around the longitudinal axis

Answer

Stability around the lateral axis

Answer

Stability around the vertical axis

Answer

Stability around the diagonal axis

Question 26

How does dihedral improve lateral stability?

Accepted Answer

By increasing the angle of attack on the lower wing during a sideslip

Answer

By reducing the pendulum effect of the fuselage

Answer

By increasing lift on the upper wing during a sideslip

Answer

By reducing drag on the upper wing during a disturbance

Question 27

How does sweepback contribute to lateral stability?

Accepted Answer

By increasing lift on the lower wing during a disturbance

Answer

By reducing the angle of attack on the upper wing during a sideslip

Answer

By reducing drag on the lower wing during a disturbance

Answer

By increasing the pendulum effect of the fuselage

Question 28

What is directional stability?

Accepted Answer

Stability around the vertical axis

Answer

Stability around the longitudinal axis

Answer

Stability around the lateral axis

Answer

Stability around the diagonal axis

Question 29

What is the primary component that provides directional stability?

Accepted Answer

The vertical tail fin and rudder

Answer

The sweepback of the wings

Answer

The dihedral angle of the wings

Answer

The horizontal stabilizer

Question 30

What is the weather-vaning effect?

Accepted Answer

The tendency of an aeroplane to turn into the relative airflow due to the vertical tail fin

Answer

The tendency of an aeroplane to stall during a sideslip

Answer

The tendency of an aeroplane to roll into a turn

Answer

The tendency of an aeroplane to pitch downward during a disturbance

Question 31

What causes adverse yaw?

Accepted Answer

Induced drag on the upgoing wing during a roll

Answer

Increased drag on the downgoing wing during a roll

Answer

Increased lift on the downgoing wing during a roll

Answer

Reduced lift on the upgoing wing during a roll

Question 32

How can adverse yaw be corrected?

Accepted Answer

By using rudder and ailerons in coordination

Answer

By using flaps during turns

Answer

By reducing the sweepback of the wings

Answer

By increasing the dihedral angle of the wings

Question 33

What is dynamic balance?

Accepted Answer

Using aerodynamic forces to assist the pilot in moving control surfaces

Answer

Reducing drag during level flight

Answer

Preventing flutter by adding weight in front of the hinge

Answer

Increasing lift during take-off

Question 34

What is mass balance?

Accepted Answer

Preventing flutter by adding weight in front of the hinge

Answer

Increasing lift during take-off

Answer

Using aerodynamic forces to assist the pilot in moving control surfaces

Answer

Reducing drag during level flight

Question 35

What is static stability?

Accepted Answer

The initial tendency of an aeroplane to return to its original position after a disturbance

Answer

The tendency of an aeroplane to oscillate indefinitely after a disturbance

Answer

The tendency of an aeroplane to remain in a sideslip condition

Answer

The tendency of an aeroplane to stall after a disturbance

Question 36

What is dynamic stability?

Accepted Answer

The tendency of an aeroplane to return to its original position after oscillations

Answer

The tendency of an aeroplane to remain in a sideslip condition

Answer

The tendency of an aeroplane to oscillate indefinitely after a disturbance

Answer

The tendency of an aeroplane to stall after a disturbance

Question 37

What is the role of the centre of gravity in stability?

Accepted Answer

It ensures proper balance and stability in all axes

Answer

It reduces drag during level flight

Answer

It increases lift during take-off

Answer

It improves lateral control during turns

Question 38

How can changes in the disposable load or fuel consumption affect stability?

Accepted Answer

They can shift the centre of gravity and affect stability

Answer

They can increase the lift-to-drag ratio

Answer

They can improve the aeroplane's maneuverability

Answer

They can reduce the effectiveness of the rudder

Question 39

What is longitudinal stability also known as?

Accepted Answer

Pitch stability

Answer

Glide stability

Answer

Roll stability

Answer

Yaw stability

Question 40

What is lateral stability also known as?

Accepted Answer

Roll stability

Answer

Pitch stability

Answer

Glide stability

Answer

Yaw stability

Question 41

What is directional stability also known as?

Accepted Answer

Yaw stability

Answer

Roll stability

Answer

Pitch stability

Answer

Glide stability

Question 42

What is the purpose of dihedral in wing design?

Accepted Answer

To improve lateral stability

Answer

To increase lift during take-off

Answer

To improve longitudinal stability

Answer

To reduce drag during level flight

Question 43

How does sweepback contribute to stability?

Accepted Answer

By improving lateral and directional stability

Answer

By reducing drag during landing

Answer

By improving longitudinal stability

Answer

By increasing lift during take-off

Question 44

How does keel effect improve lateral stability?

Accepted Answer

By acting as a pendulum to restore the aeroplane's attitude

Answer

By improving the weather-vaning tendency of the aeroplane

Answer

By increasing lift on the lower wing during a disturbance

Answer

By reducing drag on the upper wing during a sideslip

Question 45

Which control surface manages roll?

Accepted Answer

Ailerons

Answer

Elevators

Answer

Flaps

Answer

Rudder

Question 46

Which control surface manages pitch?

Accepted Answer

Elevators

Answer

Flaps

Answer

Rudder

Answer

Ailerons

Question 47

Which control surface manages yaw?

Accepted Answer

Rudder

Answer

Ailerons

Answer

Elevators

Answer

Flaps

Question 48

What is the purpose of dynamic balance in control surfaces?

Accepted Answer

To assist the pilot in moving the controls using aerodynamic forces

Answer

To prevent flutter at high speeds

Answer

To increase lift during take-off

Answer

To reduce drag during level flight

Question 49

What is the purpose of mass balance in control surfaces?

Accepted Answer

To prevent flutter at high speeds

Answer

To assist the pilot in moving the controls using aerodynamic forces

Answer

To reduce drag during level flight

Answer

To increase lift during take-off

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