Compressible Flow Quiz

What is the Mach number for subsonic flow?

• Ma > 5

• Ma > 1

• Ma = 1

• Ma < 1

What does the ideal gas law relate?

• Density, velocity, and pressure

• Mass, energy, and temperature

• Pressure, density, and temperature

• Velocity, pressure, and volume

What happens to the pressure at the stagnation point?

• It is higher than the free stream pressure

• It is equal to the free stream pressure

• It is lower than the free stream pressure

• It remains constant

In a normal shock wave, what occurs?

• Static temperature increases

• Density decreases

• Pressure decreases

• Velocity increases

What is the relationship between specific heats for an ideal gas?

• R = Cp + Cv

• R = Cp * Cv

• R = Cp - Cv

• R = Cv - Cp

What is the effect of friction on compressible flow in long pipelines?

• It stabilizes the flow

• It decreases pressure and density

• It increases pressure and density

• It has no effect

What is the formula for the speed of sound in a gas?

• a = γRT

• a = R/γT

• a = T/γR

• a = √(γRT)

What characterizes Fanno flow?

• Variable area with heat transfer

• Variable area with no friction

• Constant area with friction

• Constant area with heat transfer

What is the effect of heat addition in subsonic flow?

• Increases mass flow rate

• Causes sonic conditions

• Decreases temperature

• Increases pressure

What is the relationship between stagnation temperature and static temperature?

• T0 = T * V^2/(2Cp)

• T0 = T - V^2/(2Cp)

• T0 = T / V^2 * (2Cp)

• T0 = T + V^2/(2Cp)