AERODY MIDTERMS MULTIPLE CHOICE

smooth and parallel layers

what characterizes laminar flow?

laminar flow

which flow type is most efficient for reducing drag?

random and chaotic behavior

what does turbulent flow typically exhibit?

decreases with increased velocity

in compressible flow, what happens to the fluid density?

compressible flow

what type of flow is typically observed at very high speeds?

wave drag

which type of drag becomes more significant at high speeds?

wing shape and angle of attack

what is lift primarily generated by?

drag

what force opposes the motion of an aircraft through the air?

the forward force produced by engines

what does the term “thrust” refer to?

control pitch and stabilize flight

what is the primary role of an aircraft’s tail?

weight

_{which is NOT a component of lift?}

pressure decreases

according to bernoulli’s principle, how does an increase in airflow velocity affect pressure?

to reduce drag and improve fuel efficiency

what is the primary purpose of a winglet on an aircraft?

control yaw

what is the primary purpose of a rudder on an aircraft?

control roll

what is the primary role of the ailerons on an aircraft?

pressure, velocity, and height

what does Bernoulli’s equation relate?

a decrease in pressure

In Bernoulli’s equation, an increase in velocity leads to:

viscous flow

which assumption is NOT made in Bernoulli’s principle?

pascals

what is the unit of pressure in the context of Bernoulli’s equation?

conservation of energy

Bernoulli’s equation is derived from which principle?

force, mass, and acceleration

What does the momentum equation relate?

changes in velocity and pressure

In fluid dynamics, the momentum equation accounts for:

analyzing fluid flow in pipelines

What is the primary application of the momentum equation?

transfer of momentum by fluid motion

what does the term “convective momentum transport” refer to?

Euler’s equation

which of the following is a form of momentum equation?

conservation of energy

what does the energy equation in fluid dynamics describe?

velocity head

In the energy equation, which term typically represents kinetic energy?

loss of energy due to friction

what does the term “head loss in the energy equation refer to?

kinetic energy, potential energy, and heat

which of the following is included in the energy equation?

steady and uniform flow

what type of flow does the energy equation typically apply to?

conservation of mass

what does the continuity equation express?

increase in velocity

In the context of continuity equation, what does a decrease in cross-sectional area imply?

rho AV=C

which form of continuity equation applies to compressible flow?

it ensures mass conservation

what is the significance of continuity equation in fluid dynamics?

A1V1=A2V2

if fluid density is constant, the continuity equation simplifies to: