Advanced Aerodynamics MCQ

What is a shock wave?

• A sudden increase in velocity and temperature across a boundary.

• A disturbance that propagates at subsonic speed in a medium.

• A rapid, nearly discontinuous change in flow properties like pressure, temperature, and density.

• A region of steady flow with constant pressure.

Which of the following is a characteristic of a normal shock wave?

• The Mach number increases across the shock.

• The static pressure decreases across the shock.

• The total pressure decreases, while the static pressure increases across the shock.

• The static pressure remains constant across the shock.

What happens to the density of a fluid as it passes through a normal shock wave?

• The density increases across the shock.

• The density remains constant across the shock.

• The density decreases across the shock.

• The density fluctuates randomly across the shock.

Which of the following best describes the behavior of a supersonic flow when it encounters a normal shock wave?

• The flow becomes subsonic after the shock.

• The flow remains supersonic after the shock.

• The flow accelerates after the shock.

• The flow experiences no change in speed.

In the context of shock waves, what is the significance of the Mach number?

• It is the ratio of the speed of an object to the speed of sound in the surrounding medium.

• It indicates the speed of sound in a medium.

• It measures the temperature of the fluid.

• It determines the pressure of the fluid.

What is the primary effect of a shock wave on the temperature of a fluid?

• The temperature remains constant across the shock.

• The temperature increases across the shock.

• The temperature fluctuates randomly across the shock.

• The temperature decreases across the shock.

The thermodynamic properties of the gas behind the oblique shock wave depend on _____.

• Mach number and velocity

• Flow deflection angle

• upstream conditions and flow deflection angle

• wave angle

In subsonic flows, the open-ended tube facing into the flow always measures the --------------------- of the flow.

• Static pressure

• Stagnation pressure

• dynamic pressure

• kinetic pressure

Calculate the Stagnation pressure where the dynamic pressure is 50N/m and static pressure is 150N/m

• 200

• 150

• 100

• 50

Bernoulli’s principle is defined as the___________________________________________________________.

• A. velocity in a fluid remains constant as the fluid’s pressure changes

• B. pressure in a fluid remains constant as the fluid’s velocity changes

• C. Pressure in a fluid decreases as the fluid’s velocity increases

• D. Pressure in a fluid increases as the fluid’s velocity increases