A) Inertial force B) Fluid resistance C) Gravitational drag D) Static pressure
A) In the same direction as motion B) Opposite to the direction of motion C) Randomly relative to the motion D) Perpendicular to the motion
A) Increase the velocity B) Maintain constant velocity C) Decrease the velocity D) Eliminate the velocity entirely
A) Stokes number B) Bejan number C) Reynolds number D) Mach number
A) Proportional to velocity squared B) Proportional to velocity C) Inversely proportional to velocity D) Proportional to velocity cubed
A) Skin friction drag B) Wave drag C) Induced drag D) Form drag
A) Form drag B) Wave drag C) Parasitic drag D) Skin friction drag
A) Form drag and skin friction drag B) Form drag and wave drag C) Viscous drag and inertial drag D) Wave drag and lift-induced drag
A) Streamlined body B) Laminar body C) Bluff body D) Efficient body
A) Surface roughness B) Presence of shockwaves C) Cross-sectional area D) Angle of attack
A) It decreases B) It increases C) It disappears D) It remains constant
A) Shockwaves B) Skin friction C) Trailing vortices D) Form drag
A) At the onset of stall B) As speed increases C) As angle of attack increases D) When drag coefficient decreases
A) Measuring the wing surface area B) Comparing the drag of different aircraft C) Determining the fuel tank capacity D) Calculating the total weight of an aircraft
A) As the cube of the speed B) As the square of the speed C) Independent of speed D) Linearly with speed
A) Density divided by dynamic viscosity B) Velocity divided by density C) Dynamic viscosity multiplied by density D) Dynamic viscosity divided by density
A) The cube of the speed B) The fourth power of the speed C) The square of the speed D) The speed |