1st 75

When the angle of attack of a symmetrical airfoil is increased, the center of pressure will:

• have very limited movement

• move aft along the aerofoil surface

• remain unaffected

• move forward to the leading edge

When the angle of attack of an asymmetrical airfoil is increased, the center of pressure will:

• have very limited movement

• move aft along the aerofoil surface

• remain unaffected

• move forward to the leading edge

Why does increasing speed also increase lift?

• The increased impact of the relative wind on an aerofoil’s lower surface creates a greater amount of air being deflected downward

• The increased speed of the air passing over an aerofoil’s upper surface decreases the static pressure, thus creating a greater pressure differential between the upper and lower surface

• The increased velocity of the relative wind overcomes the increased drag

• Increasing speed decreases drag

What flight condition should be expected when an aircraft leaves ground effect?

• A decrease in parasite drag permitting a lower angle of attack

• An increase in induced drag and a requirement for a higher angle of attack

• An increase in dynamic stability

• A decrease in induced drag requiring a smaller angle of attack

How does the wake turbulence vortex circulate around each wing tip, when viewed from the rear?

• Inward, upward, and around the wing tip

• Counterclockwise

• Outward, upward, and around the wing tip

• Outward, downward and around the wing tip

The angle of attack of a wing directly controls the:

• angle of incidence of the wing

• distribution of pressures acting on the wing

• amount of airflow above and below the wing

• dynamic pressure acting in the airflow

An aeroplane leaving ground effect will:

• experience a reduction in ground friction and require a slight power reduction

• require a lower angle of attack to maintain the same lift coefficient

• experience a reduction in induced drag and require a smaller angle of attack

• experience an increase in induced drag and require more thrust

If the same angle of attack is maintained in ground effect as when out of ground effect, lift will:

• increase, and induced drag will increase

• increase, and induced drag will decrease

• decrease, and induced drag will increase

• decrease and induced drag will decrease

As airspeed decreases in level flight below that speed for maximum lift/drag ratio, total drag of an aeroplane:

• decreases because of lower parasite drag

• increases because of increased parasite drag

• increases because of increased induced drag

• decreases because of lower induced drag

If the Indicated Airspeed of an aircraft is increased from 50 kt to 100 kt, parasite drag will be:

• four times greater

• six times greater

• two times greater

• one quarter as much