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