AERT 4040 Final Exam UPDATED
QUESTIONS AND CORRECT ANSWERS
Intro Quiz - CORRECT ANSWER
The Critical Mach Number of an aircraft is the highest Mach Number the aircraft can travel
before structural damage is done to the airframe. - CORRECT ANSWER False
How did the Wrights correct their problem of roll reversal? - CORRECT
ANSWER They developed a movable rudder and connected it to the roll control
The temperature and pressure conditions for a standard day are ______________. -
CORRECT ANSWER 59 degrees F / 15 degrees C and 29.92 in of Hg / 1013 mbar
Density is - CORRECT ANSWER Mass per unit volume
What did the Wright brothers think was the most difficult problem, thus the first problem they
attacked when building their Flyer? - CORRECT ANSWER How to control and
balance the aircraft
What was unique about the engine that the Wrights used for their Flyer? - CORRECT
ANSWER It was the first time aluminum was used in the construction od an aircraft
Density Altitude is used as a predictor of aircraft performance, not as a height reference. -
CORRECT ANSWER True
What method did the Wright brothers use to control roll? - CORRECT ANSWER They
developed a technique of wing warping
The speed of sound in air is dependent upon the - CORRECT ANSWER Air
Temperature only
,Air viscosity __________ as the air temperature increases. - CORRECT
ANSWER Increases
An aircraft's Mach Number is the aircraft's - CORRECT ANSWER TAS divided by the
Local Speed of Sound
The Basics Quiz - CORRECT ANSWER
The chord of an airfoil is defined as ___________. - CORRECT ANSWER a measure
of the wing along the chord line, from the leading edge to the trailing edge
Aspect Ratio of a wing is - CORRECT ANSWER the ratio of the wingspan to the
average cord
A moment is _________. - CORRECT ANSWER created when a force is applied at
some distance from an axis or fulcrum, producing rotation about that point
Total pressure is: - CORRECT ANSWER static pressure plus dynamic pressure
The center of gravity is the point at which __________. - CORRECT ANSWER all
weight is concentrated
Wing Loading is: - CORRECT ANSWER the ratio of the aircraft weight to the surface
area of the wing
The camber of an airfoil: - CORRECT ANSWER is the maximum distance between
the cord and the mean camber line measured perpendicular to the cord
The angle of attack of a wing is the angle between the wing's cord and the horizon -
CORRECT ANSWER False
, The Law of Interaction states __________. - CORRECT ANSWER "For every action
there is an equal and opposite reaction."
The General Gas Law sets the relationship between three properties of air: pressure (P),
density (ρ), and temperature (T). It is expressed as an equation where R is a constant for any
given gas. What is the correct expression of the General Gas Law. - CORRECT
ANSWER ρ = P/RT
The angle of incidence of a wing is the angle between a line drawn through the 25% cord
points and a line drawn parallel to the lateral axis. - CORRECT ANSWER False
The axis is which the aircraft nose moves left or right about the center of gravity. -
CORRECT ANSWER yaw
Static pressure acts: - CORRECT ANSWER in all directions
Which formula or equation describes the relationship between force (F), acceleration (a) and
mass (m)? - CORRECT ANSWER F = ma
The Mean Camber Line: - CORRECT ANSWER is a line drawn halfway between the
upper and lower surface of an airfoil.
Lift Quiz - CORRECT ANSWER
A _________ airfoil produces lift at zero degrees angle of attack. - CORRECT
ANSWER positively cambered
When an aircraft flies more slowly, more AOA is needed, when it flies faster less AOA is
needed - CORRECT ANSWER True
QUESTIONS AND CORRECT ANSWERS
Intro Quiz - CORRECT ANSWER
The Critical Mach Number of an aircraft is the highest Mach Number the aircraft can travel
before structural damage is done to the airframe. - CORRECT ANSWER False
How did the Wrights correct their problem of roll reversal? - CORRECT
ANSWER They developed a movable rudder and connected it to the roll control
The temperature and pressure conditions for a standard day are ______________. -
CORRECT ANSWER 59 degrees F / 15 degrees C and 29.92 in of Hg / 1013 mbar
Density is - CORRECT ANSWER Mass per unit volume
What did the Wright brothers think was the most difficult problem, thus the first problem they
attacked when building their Flyer? - CORRECT ANSWER How to control and
balance the aircraft
What was unique about the engine that the Wrights used for their Flyer? - CORRECT
ANSWER It was the first time aluminum was used in the construction od an aircraft
Density Altitude is used as a predictor of aircraft performance, not as a height reference. -
CORRECT ANSWER True
What method did the Wright brothers use to control roll? - CORRECT ANSWER They
developed a technique of wing warping
The speed of sound in air is dependent upon the - CORRECT ANSWER Air
Temperature only
,Air viscosity __________ as the air temperature increases. - CORRECT
ANSWER Increases
An aircraft's Mach Number is the aircraft's - CORRECT ANSWER TAS divided by the
Local Speed of Sound
The Basics Quiz - CORRECT ANSWER
The chord of an airfoil is defined as ___________. - CORRECT ANSWER a measure
of the wing along the chord line, from the leading edge to the trailing edge
Aspect Ratio of a wing is - CORRECT ANSWER the ratio of the wingspan to the
average cord
A moment is _________. - CORRECT ANSWER created when a force is applied at
some distance from an axis or fulcrum, producing rotation about that point
Total pressure is: - CORRECT ANSWER static pressure plus dynamic pressure
The center of gravity is the point at which __________. - CORRECT ANSWER all
weight is concentrated
Wing Loading is: - CORRECT ANSWER the ratio of the aircraft weight to the surface
area of the wing
The camber of an airfoil: - CORRECT ANSWER is the maximum distance between
the cord and the mean camber line measured perpendicular to the cord
The angle of attack of a wing is the angle between the wing's cord and the horizon -
CORRECT ANSWER False
, The Law of Interaction states __________. - CORRECT ANSWER "For every action
there is an equal and opposite reaction."
The General Gas Law sets the relationship between three properties of air: pressure (P),
density (ρ), and temperature (T). It is expressed as an equation where R is a constant for any
given gas. What is the correct expression of the General Gas Law. - CORRECT
ANSWER ρ = P/RT
The angle of incidence of a wing is the angle between a line drawn through the 25% cord
points and a line drawn parallel to the lateral axis. - CORRECT ANSWER False
The axis is which the aircraft nose moves left or right about the center of gravity. -
CORRECT ANSWER yaw
Static pressure acts: - CORRECT ANSWER in all directions
Which formula or equation describes the relationship between force (F), acceleration (a) and
mass (m)? - CORRECT ANSWER F = ma
The Mean Camber Line: - CORRECT ANSWER is a line drawn halfway between the
upper and lower surface of an airfoil.
Lift Quiz - CORRECT ANSWER
A _________ airfoil produces lift at zero degrees angle of attack. - CORRECT
ANSWER positively cambered
When an aircraft flies more slowly, more AOA is needed, when it flies faster less AOA is
needed - CORRECT ANSWER True
