Aerodynamics 50% توقع

What is the angle of attack?

• The angle between the chord line and the aircraft's longitudinal axis

• The angle between the chord line and the relative wind

• The angle between the mean camber line and the relative wind

What does the ISA stand for?

• International System of Aerodynamics

• International Standard Atmosphere

• International Speed Agreement

What is the chord line of a profile?

• The line connecting the upper and lower camber

• A straight line between the leading and trailing edge

• A line perpendicular to the wing's root

What is dynamic pressure?

• Total pressure minus static pressure

• Static pressure minus total pressure

• Airspeed divided by pressure

Which type of wing stalls at the root first?

• Elliptical

• Tapered

• Rectangular

What does a high camber profile result in?

• Lower lift at zero AOA

• Higher coefficient of lift at zero AOA

• Reduced drag

Where is the static pressure lowest on an aerofoil?

• At the leading edge

• At the trailing edge

• At the point of maximum thickness

What is the function of a slot in a wing profile?

• Decrease camber

• Prevent flow separation

• Increase drag

What is the purpose of wing fences?

• Increase stall angle

• Reduce spanwise flow

• Create lift

What is the main difference between laminar and turbulent boundary layers?

• Laminar is thicker and more energetic

• Turbulent has more drag but less separation tendency

• Laminar has more drag