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AT 116 TEST 1 QUESTIONS WITH ANSWERS
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AT 116 TEST 1 QUESTIONS WITH ANSWERS...
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AT 116 TEST 1 QUESTIONS WITH ANSWERSwhat are standard conditions - ANSWER 59 degrees
Sea level
Zero humidity
41 degrees N Lat.
•By 18,000 feet____ of all the air on the planet is below you. By 34,000 feet
_____ of all the air is below you. - ANSWER •By 18,000 feet 50 of all the air
on the planet is below you. By 34,000 feet 75 of all the air is below you.
air temp falls at a constant rate until ___________ - ANSWER 36,000 ft
what happens to static pressure as he aera of a tube decrease? - ANSWER
decreases
what happens to air velocity in a tube when the area of the tube decreases? -
ANSWER Increases
•The Bernoulli Effect accounts for approximately ____________ of the LIFT of
a wing.
Newton's Third Law of Motion accounts for the remaining ________ of the
LIFT. - ANSWER 90%
10%
two ways to alter the Angle of Attack (AOA) - ANSWER •A) Change the
elevation of the chord line (pitch the wing up)•
B) Change the direction of the Relative Wind (blow the air at the wing from a
different direction) or make the wing travel in a different direction to meet the
air.
, •There are two ways to change the elevation of the chord line - ANSWER •A
)pitch the entire wing up.
•B) lower the trailing edge of the wing by means of some kind of flight control
device.
•Lift is _______________to the relative wind. - ANSWER perpendicular
•Angle of Incidence =? - ANSWER •Angle of Incidence = angle between the
chord line of the wing and the longitudinal axis of the aircraft.
Three types of Parasite Drag: - ANSWER A)Pressure Drag
B)Skin Friction Drag
C) Interference Drag:
Two basic kinds of drag: - ANSWER 1 - PARASITE DRAG
Drag made by the resistance of the air flowing around a body.
2 - INDUCED DRAG
Drag made by the production of lift.
A)Pressure Drag - ANSWER A)Pressure Drag: Also called "Form Drag".The
drag resulting from air impinging (running into) something
B)Skin Friction Drag - ANSWER B)Skin Friction Drag: Also called "Viscous
Drag". The drag resulting from the friction of the air sliding across a surface or
the adhesion of the air trying to stick to a surface of a wing or aircraft.
Interference Drag - ANSWER The drag resulting from the turbulence where
surfaces meet at 90 degree angles or less (acute angles).
how does induced drag happen - ANSWER 1.The Bernoulli Effect (lift) is
always perpendicular to the relative wind.2.When the pressure wave (wing tip
vortex) swirls ahead of the wing the downward motion of the pressure wave
bends the relative wind downward.3.Since the "LIFT" vector is tilted slight
backwards, part of the Bernoulli Effect is pulling the wing rearward.4.The
stronger the vortex the more the Relative Wind gets bent and the more the
"Bernoulli Effect gets tipped backwards, and the bigger the DRAG vector gets.
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