AVIT 323 Block 2 Study Guide UPDATED
ACTUAL Exam Questions and CORRECT
Answers
In one sentence, define induce drag and be very specific. (six words) - CORRECT
ANSWER - The aft acting component of lift
Explain Sphere of influence. - CORRECT ANSWER - airflow that is affected by airfoil
What happens to induced drag as:
a. aspect ratio goes up?
b. weight goes up?
c. speed goes up?
d. altitude goes up? - CORRECT ANSWER - A) down
B) up
C) down
D) down
Why are wingtip vortices included in induced drag? - CORRECT ANSWER - The vortices
created are unstable, and they quickly combine to produce wingtip vortices. The resulting
vortices change the speed and direction of the airflow behind the trailing edge, deflecting it
downwards, and thus inducing downwash behind the wing.
Define viscosity - CORRECT ANSWER - Resistance to shear
What happens to the boundary layer during the adverse pressure gradient? - CORRECT
ANSWER - Flow will always slow along the adverse pressure gradient, if it is slow
enough it can separate
ACTUAL Exam Questions and CORRECT
Answers
In one sentence, define induce drag and be very specific. (six words) - CORRECT
ANSWER - The aft acting component of lift
Explain Sphere of influence. - CORRECT ANSWER - airflow that is affected by airfoil
What happens to induced drag as:
a. aspect ratio goes up?
b. weight goes up?
c. speed goes up?
d. altitude goes up? - CORRECT ANSWER - A) down
B) up
C) down
D) down
Why are wingtip vortices included in induced drag? - CORRECT ANSWER - The vortices
created are unstable, and they quickly combine to produce wingtip vortices. The resulting
vortices change the speed and direction of the airflow behind the trailing edge, deflecting it
downwards, and thus inducing downwash behind the wing.
Define viscosity - CORRECT ANSWER - Resistance to shear
What happens to the boundary layer during the adverse pressure gradient? - CORRECT
ANSWER - Flow will always slow along the adverse pressure gradient, if it is slow
enough it can separate
