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NIFE Aero Exam Study Guide Solutions

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NIFE Aero Exam Study Guide Solutions Define Vector - ANSWER-A quantity that expresses both magnitude and direction. A vector quantity is represented by an arrow that displays direction and has a length proportional to magnitude Moment - ANSWER-Force applied at some distance from an axis or fulcr...

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  • November 4, 2024
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NIFE Aero Exam Study Guide Solutions


Define Vector - ANSWER✔✔-A quantity that expresses both magnitude and direction. A vector quantity

is represented by an arrow that displays direction and has a length proportional to magnitude


Moment - ANSWER✔✔-Force applied at some distance from an axis or fulcrum


Fxd


(Distance: from the point of rotation that is perpendicular to force, "moment arm")


Equilibrium Flight - ANSWER✔✔-When the sum of all FORCE and all MOMENTS around the COG are

equal to zero


When are the four forces that act on an airplane in equilibrium? - ANSWER✔✔-Thrust, drag, lift, weight


Atmospheric static pressure - ANSWER✔✔-Weight of a column of air over a given area


Air Density - ANSWER✔✔-The total mass of air particles per unit of volume


What three things happen as air becomes less dense for airplane: - ANSWER✔✔-Reduces power


Reduces thrust


Reduces lift



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With altitude increase, what happens to air temp - ANSWER✔✔-Decreases linearly at 2 C (3.57 F) per

1000ft, until 36000ft.


What is this rate of temp change called - ANSWER✔✔-Average Lapse Rate


Humidity - ANSWER✔✔-Amount of water vapor in the air


Humidity and Density relationship - ANSWER✔✔-Inverse


General Gas Law - ANSWER✔✔-P = pRT


Steady airflow - ANSWER✔✔-Exists if at every point in the airflow static pressure, density, temperature,

and velocity remain constant over time (may vary from one point to another, but at any given point, it is

constant)




Same path is followed


Steamline - ANSWER✔✔-the path that air particles follow in steady airflow


Streamtube (2 things) - ANSWER✔✔-collection of many adjacent streamlines.


closed system


Continuity Equation - ANSWER✔✔-A1V1 = A2V2




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Bernoulli's Principle - ANSWER✔✔-Total energy of a fluid can be separated into potential energy (static

pressure) and kinetic energy (dynamic pressure)


Total Pressure (Pt) = - ANSWER✔✔-Ps + q


Talk about Bernoullis Prin in a closed system - ANSWER✔✔-Total pressure is constant, therefore an

increase in static pressure = decrease in dynamic pressure


PT = - ANSWER✔✔-PT = Ps + (1/2)pV^2


Indicated Airspeed - ANSWER✔✔-Actual instrument indication of the dynamic pressure the airplane is

exposed to during flight


Calibrated Airspeed - ANSWER✔✔-When indicated airspeed is corrected for instrument error


Equivalent Airspeed - ANSWER✔✔-True airspeed at sea level on a standard day that produces the same

dynamic pressure as the actual flight condition




Found by correcting calibrated airspeed for compressibility error


True Airspeed - ANSWER✔✔-Actual velocity at which an airplane moves through an air mass




Found by correcting equivalent airspeed for the difference between the local air density (p) and the

density of the air at sea level on a standard day (po)

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