21b. described two of the three ways a pilot can control lift during flight. - ️️a pilot can control lift by changing the angle of attack by varying the pitch of the airplane using the elevator, by changing the airspeed by adjusting the power setting of the engine or by climbing or descending, ...
Aviation 50 exam Questions And
Answers
21b. described two of the three ways a pilot can control lift during flight. - ✔ ✔ a pilot can control lift
by changing the angle of attack by varying the pitch of the airplane using the elevator, by changing the
airspeed by adjusting the power setting of the engine or by climbing or descending, or by adjusting the
chamber of the wing by extending or retracting lift-enhancing devices like flaps.
22. explain at least two challenges in making an operational jet engine and jet aircraft. - ✔ ✔ it was
difficult for engineers to find materials that were suitable for handing the stress involved in operating a
jet engine (mainly heat and pressure). it was also difficult for them to determine how to effectively
managing the challenges of high altitude flight and high-speed flight. for example, as a jet aircraft
approached the speed of sound, vibrations caused by shocked waves caused the aircraft to be nearly
uncontrollable. the development of swept wings solved for this problem
22b. describe how newton's third law of motion and Bernoulli's principle explain the generation of lift by
an airfoil. - ✔ ✔ according to Bernoulli's principle, when air moving over the top of a wing surface
travels faster than air moving over the bottom of the wing surface, pressure above the wing is reduced,
producing lift. these pressure changes cause the airflow to curve downwards, creating downwash
behind the airfoil. newton's third law states that for every action there is an equal and opposite
reaction, so that a downward force is met with an equal and opposite upward force. when an airfoil
bends traveling across its surface downward, this action results in an equal and opposite upward force
called lift.
23. why was the success of the mercury program an important achievement during the space race? - ✔
✔ mercury was the first program to put astronauts into space. it perfected techniques to orbit a
manned spacecraft around earth, determined an astronaut's capability to function and live in space, and
recover and astronaut and spacecraft safety. Mercury provided important lessons that future missions
built on.
23b. is it more desirable for the wing root or wing tip to stall first and why? - ✔ ✔ it is preferable for
the wing root ton stall first. if the wingtip stalls before the root, the disrupted airflow near the wingtip
can reduce aileron effectiveness to such an extent that the pilot can lose control over the roll to the
aircraft as the aircraft stalls, causing a wing to drop, which in extreme cases could lead to entering a
spin.
24. how did the Apollo-Soyuz mission help build trust between the americans and the soviets after the
cold war? - ✔ ✔ the Apollo-Soyuz mission represented the first international joint effort in space and
was the first of many successful collaborations between the Americans and the Russians. the goal was to
dock two spacecraft that were not similar.one of the first challenges was that the astronauts and
, cosmonauts had to learn each other's languages. the Apollo spacecraft was also redesigned with a
module that served as a during unit and an airlock unit.
24b. explain how weight and balance of an airplane can change during flight. - ✔ ✔ an airplane's
weight can change during flight by the burning of fuel or dropping of cargo. the balance of an airplane
can change by the movement of passengers or the incidental shifting or sliding of luggage or cargo
during flight.
25. how was the development of the space transport system an important milestone in NAS's research. -
✔ ✔ the space shuttle program was the first reusable spacecraft over the course of 135 missions, it
carried important cargo, conducted repair missions, ferried astronauts, and completed experiments in
space.it demonstrated important aviation innovations, such as fly-by-wire systems, advanced navigation
and control algorithms, and thermal protection systems.
16. after the cold war ended, what was the relationship between the united states and the soviet union
regarding space exploration? - ✔ ✔ d. the united states and the soviet union started to work
together, eventually docking their aircraft in space
16b. torque effect is most pronounced under which conditions? select all that apply. - ✔ ✔ a. high
power setting d. low airspeed
17. power and performance were improved in aircraft because of jet engines, but ________________. -
✔ ✔ b. the aircraft designs were greatly impacted as engineers worked to take full advantage of the
increased performance provided
17b. what is an advantage of a variable-pitch propeller? - ✔ ✔ b. permits the pilot to set the
propeller blade angle for the most efficient performance.
18. fill in the blank: the first operational orbiter to fly in space was the _________________. - ✔ ✔ a.
Columbia
18b. as airspeed decreases in level flight below that speed for maximum lift/drag ratio, total drag of a
airplane __________. - ✔ ✔ b. increases because of increased induced drag
19. fill in the blank: newton's _____________ states that every action has an equal and opposite
reaction. - ✔ ✔ b. third law of motion
19b. which of the following is created by the resistance of air moving across the surface of an airplane? -
✔ ✔ c. skin friction drag
1b. forces are vectors because _______________. - ✔ ✔ c. they have magnitude and direction
2. the part of the "stack" of the space transport system that looks like an airplane is called the
_________. - ✔ ✔ a. orbiter
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