NIFE Aero UPDATED ACTUAL Questions and CORRECT Answers
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Course
NIFE Aero
Institution
NIFE Aero
NIFE Aero UPDATED ACTUAL Questions
and CORRECT Answers
Define Vector - CORRECT 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 - CORRECT ANSWER- Force appli...
NIFE Aero UPDATED ACTUAL Questions
and CORRECT Answers
Define Vector - CORRECT 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 - CORRECT 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 - CORRECT 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? - CORRECT ANSWER-
✔✔Thrust, drag, lift, weight
Atmospheric static pressure - CORRECT ANSWER- ✔✔Weight of a column of air over a
given area
Air Density - CORRECT ANSWER- ✔✔The total mass of air particles per unit of volume
What three things happen as air becomes less dense for airplane: - CORRECT ANSWER-
✔✔Reduces power
Reduces thrust
Reduces lift
With altitude increase, what happens to air temp - CORRECT ANSWER- ✔✔Decreases
linearly at 2 C (3.57 F) per 1000ft, until 36000ft.
What is this rate of temp change called - CORRECT ANSWER- ✔✔Average Lapse Rate
,Humidity - CORRECT ANSWER- ✔✔Amount of water vapor in the air
Humidity and Density relationship - CORRECT ANSWER- ✔✔Inverse
General Gas Law - CORRECT ANSWER- ✔✔P = pRT
Steady airflow - CORRECT 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 - CORRECT ANSWER- ✔✔the path that air particles follow in steady airflow
Streamtube (2 things) - CORRECT ANSWER- ✔✔collection of many adjacent streamlines.
closed system
Bernoulli's Principle - CORRECT ANSWER- ✔✔Total energy of a fluid can be separated
into potential energy (static pressure) and kinetic energy (dynamic pressure)
Total Pressure (Pt) = - CORRECT ANSWER- ✔✔Ps + q
Talk about Bernoullis Prin in a closed system - CORRECT ANSWER- ✔✔Total pressure is
constant, therefore an increase in static pressure = decrease in dynamic pressure
PT = - CORRECT ANSWER- ✔✔PT = Ps + (1/2)pV^2
Indicated Airspeed - CORRECT ANSWER- ✔✔Actual instrument indication of the dynamic
pressure the airplane is exposed to during flight
, Calibrated Airspeed - CORRECT ANSWER- ✔✔When indicated airspeed is corrected for
instrument error
Equivalent Airspeed - CORRECT 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 - CORRECT 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 - CORRECT ANSWER- ✔✔TAS increases
Ground speed - CORRECT ANSWER- ✔✔Airplane's actual speed over the ground
Correct TAS for the movement of the air mass (wind)
Mean Camber Line - CORRECT ANSWER- ✔✔locus of points halfway between upper and
lower surfaces, measured perpendicular to the mean camber line itself
Chordline - CORRECT ANSWER- ✔✔infinitely long, straight line which passes through its
leading and trailing edges.
Chord - CORRECT ANSWER- ✔✔Precise measurement between the leading and trailing
edges measured along the chordline
Root Chord - CORRECT ANSWER- ✔✔Measured at the wing centerline
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