Aero I Final Quiz (Raghav)

Which of these is not a point property?

• Mass

• Temperature

• Pressure

• Density

• Specific Volume

A perfect gas model assumes one of the following is negligible.

• Intermolecular Forces

• Shear Forces

• Pressure Forces

• Intramolecular Forces

Match the following aerodynamic property to their appropriate units.

• Pressure

• K

• Density

• N⁄m²

• Specific Gas Constant

• kg/m³

• Temperature

• J/kg*K

n fluid dynamics, a flow is considered to be in continuum if the Knudsen number - Kn << 1

• True

• False

In a Newtonian fluid the dynamic viscosity is NOT constant with respect to strain-rate or rate-of-strain

• True

• False

The source of all aerodynamics forces and moments is ____ forces and ____ forces.

The center of pressure is the location along the chord line where the

• Aerodynamic moment is 0

• Aerodynamic force is 0

• normal force is 0

• axial force is 0

• all of these

Buoyancy force on a body is equal to the _________ of fluid displaced by the body

• weight

• volume

• mass

• density

Match the following Mach numbers (M) to the appropriate flow regime

• 0.8 < M < 1.2

• Hypersonic

• M = 1

• Sonic

• M > 5

• Transonic

• M<1

• Incompressible

• M < 0.3

• Subsonic

Lift and drag force are always represented perpendicular and parallel to the _______ respectively

• Effective Freestream

• Chord line

• Horizontal Ground Plane

• Net reaction force