Aerodynamics AVT 203 Test 2 Questions And Correct Answers

Aerodynamics AVT 203 Test 2 Questions And
Correct Answers


As airflow passes through a shockwave, its velocity slows down

a. true

b. false - ANSWER a. true



Which one of these phases of flight is the most difficult when considering aircraft design
and control?

a. Subsonic flight

b. Transonic flight

c. Supersonic flight - ANSWER b. Transonic flight



What is the speed of sound at sea level?

a. 760 MPH

b. 250 MPH

c. 3836 MPH - ANSWER a. 760 MPH



How does altitude effect the speed of sound?

a. The speed of sound speeds up at higher altitudes

b. Altitude does not effect the speed of sound

c. The speed of sound slows down at higher altitudes - ANSWER c. The speed of sound
slows down at higher altitudes



2 aircraft flying at significantly different altitudes at the same speed will have the same
Mach number?

, a. True

b. False - ANSWER b. False



The major concern with airflow after it passes through a shockwave that has formed on
a wing is

a. The dissipation of heat obstructed from the airflow

b. The increase of pressure in airflow

c. The airflow separation from the wing - ANSWER c. The airflow separation from the
wing



What is Mach number?

a. The ratio of the aircraft's speed to the speed of sound

b. The ratio of the aircraft's speed to its critical Mach number

c. The ratio of the aircraft's critical Mach number to the speed of sound - ANSWER a.
The ratio of the aircraft's speed to the speed of sound



How does the speed of sound differ with the changes in temperature?

a. The speed of sound slows down as it gets hotter

b. The speed of sound speeds up as it gets hotter

c. The speed of sound doesn't care how hot it be - ANSWER b. The speed of sound
speeds up as it gets hotter



Subsonic air is incompressible and supersonic air is compressible

a. True

b. False - ANSWER a. True



Vortex generators are used to

a. Decrease the amount of air spilling over the tips of the wings

b. Increase the laminar airflow over the wing