NIFE Aero Exam Questions With Correct
Answers
Define Vector - answerA 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 - answerForce applied at some distance from an axis...
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
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
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
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)
If IAS remains constant while climbing from sea level to some higher altitude... what happens to
TAS - answer✔✔TAS increases
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