NIFE AERO EXAM QUESTIONS AND
ANSWERS 100% PASS.
Airfoil - ANS A streamlined shape designed to produce lift as it moves through the air
angle of attack (AOA α) - ANS the angle formed between the relative wind and the chord line
of the airfoil
angle of incidence - ANS the angle between the airplane's longitudinal axis and the chordline
of its wing. The root chord is commonly chosen to measure this
average chord (c) - ANS the geometric average of every chord from the wing root to the
wingtip. Also called mean geometric chord.
Bernoulli's Equation - ANS Pₜ = Pₛ + q
In aerodynamics, a law or theorem stating that in a flow of incompressible fluid, the sum of the
static pressure and the dynamic pressure along a streamline is constant if gravity and frictional
effects are disregarded.
boundary layer - ANS the layer of airflow over the surface of an airfoil, which shows local
airflow retardation caused by viscosity. The boundary layer is very thin at the leading edge of an
airfoil (about 1mm) and grows in thickness as it moves over a body. It is composed of laminar
flow and turbulent flow.
calibrated airspeed (CAS) - ANS Indicated airspeed corrected for instrument error
2026 STUDY MATERIAL @COPYRIGHT RESERVED 1
,camber - ANS the curvature of the mean line of airfoil fro leading edfe to trailing edge; the
amount of this curvature.
center of gravity (CG) - ANS the point at which the weight of an object is considered to be
concentrated
chord - ANS a measure of the chord line from the leading edge to the trailing edge of an
airfoil. The chord may vary in length from the wingtip to wing root. The root chord 𝒸R, is the
chord at the wing centerline and the tip chord, 𝒸T, is measured at the wingtip.
Coefficient of drag (Cd) - ANS the dimensionless portion of the total lift on an airfoil that is
dependent on the same variables that affect Cf
coefficient of lift (CL) - ANS the dimensionless portion of the total lift on an airfoil that is
dependent on the same variables that affect Cf
continuity equation - ANS ρ1A1V1=ρ2A2V2. Principle of physics that states that for fluids, the
mass flow rate has the same value at every position along a closed tube.
critical attitude - ANS the maximum altitude at which, in the standard atmosphere, an engine
produces its sea level rated horsepower or torque.
downwash - ANS chordwise airflow from the upper surface of airfoil passing downward
behind the trailing edge to the lower surface. Downwash decreases the amount of lift produced
by the wing. Any downward moving airflow.
equivalent airspeed (EAS) - ANS the true airspeed at sea level on standard day that produces
the same dynamic pressure as the actual aircraft condition. It is equal to calibrated airspeed
corrected for compressibility of air.
2026 STUDY MATERIAL @COPYRIGHT RESERVED 2
, General Gas Law - ANS P=ρRT. Law of physics that shows the relationship between properties
of air: pressure (P), density (ρ), and temperature (T). R is a constant for any given mixture of
gases (such as dry air).
ground effect - ANS the dramatic reduction of induced drag and thrust required that occurs
within one wingspan of the ground or other surface.
Indicated airspeed (IAS) - ANS The instrument indication for the amount of dynamic pressure
that the aircraft is creating during some given flight condition. Indicated airspeed is displayed in
knots, abbreviated KIAS.
induced drag (Di) - ANS That portion of total drag resulting from production of lift.
laminar flow - ANS the portion of the boundary layer airflow that is smooth and unbroken
and travels along well defined streamlines
parasite drag (Dp) - ANS All drag not associated with the production of lift.
positive camber airfoil - ANS An airfoil in which the mean camber line is above the chordline.
potential energy (PE) - ANS the ability of a body to do work because of its position or physical
state
power (P) - ANS the rate of doing work, or work per unit time, measured in ft-lbs/sec or
horsepower
power control lever (PCL) - ANS control on a propeller driven airplane or helicopter, that
adjusts the fuel flow and therefore the power output of the engine(s). Similar to the throttle on
a jet aircraft.
power required (Pr) - ANS The power required to produce enough thrust to overcome drag in
level equilibrium flight.
2026 STUDY MATERIAL @COPYRIGHT RESERVED 3
ANSWERS 100% PASS.
Airfoil - ANS A streamlined shape designed to produce lift as it moves through the air
angle of attack (AOA α) - ANS the angle formed between the relative wind and the chord line
of the airfoil
angle of incidence - ANS the angle between the airplane's longitudinal axis and the chordline
of its wing. The root chord is commonly chosen to measure this
average chord (c) - ANS the geometric average of every chord from the wing root to the
wingtip. Also called mean geometric chord.
Bernoulli's Equation - ANS Pₜ = Pₛ + q
In aerodynamics, a law or theorem stating that in a flow of incompressible fluid, the sum of the
static pressure and the dynamic pressure along a streamline is constant if gravity and frictional
effects are disregarded.
boundary layer - ANS the layer of airflow over the surface of an airfoil, which shows local
airflow retardation caused by viscosity. The boundary layer is very thin at the leading edge of an
airfoil (about 1mm) and grows in thickness as it moves over a body. It is composed of laminar
flow and turbulent flow.
calibrated airspeed (CAS) - ANS Indicated airspeed corrected for instrument error
2026 STUDY MATERIAL @COPYRIGHT RESERVED 1
,camber - ANS the curvature of the mean line of airfoil fro leading edfe to trailing edge; the
amount of this curvature.
center of gravity (CG) - ANS the point at which the weight of an object is considered to be
concentrated
chord - ANS a measure of the chord line from the leading edge to the trailing edge of an
airfoil. The chord may vary in length from the wingtip to wing root. The root chord 𝒸R, is the
chord at the wing centerline and the tip chord, 𝒸T, is measured at the wingtip.
Coefficient of drag (Cd) - ANS the dimensionless portion of the total lift on an airfoil that is
dependent on the same variables that affect Cf
coefficient of lift (CL) - ANS the dimensionless portion of the total lift on an airfoil that is
dependent on the same variables that affect Cf
continuity equation - ANS ρ1A1V1=ρ2A2V2. Principle of physics that states that for fluids, the
mass flow rate has the same value at every position along a closed tube.
critical attitude - ANS the maximum altitude at which, in the standard atmosphere, an engine
produces its sea level rated horsepower or torque.
downwash - ANS chordwise airflow from the upper surface of airfoil passing downward
behind the trailing edge to the lower surface. Downwash decreases the amount of lift produced
by the wing. Any downward moving airflow.
equivalent airspeed (EAS) - ANS the true airspeed at sea level on standard day that produces
the same dynamic pressure as the actual aircraft condition. It is equal to calibrated airspeed
corrected for compressibility of air.
2026 STUDY MATERIAL @COPYRIGHT RESERVED 2
, General Gas Law - ANS P=ρRT. Law of physics that shows the relationship between properties
of air: pressure (P), density (ρ), and temperature (T). R is a constant for any given mixture of
gases (such as dry air).
ground effect - ANS the dramatic reduction of induced drag and thrust required that occurs
within one wingspan of the ground or other surface.
Indicated airspeed (IAS) - ANS The instrument indication for the amount of dynamic pressure
that the aircraft is creating during some given flight condition. Indicated airspeed is displayed in
knots, abbreviated KIAS.
induced drag (Di) - ANS That portion of total drag resulting from production of lift.
laminar flow - ANS the portion of the boundary layer airflow that is smooth and unbroken
and travels along well defined streamlines
parasite drag (Dp) - ANS All drag not associated with the production of lift.
positive camber airfoil - ANS An airfoil in which the mean camber line is above the chordline.
potential energy (PE) - ANS the ability of a body to do work because of its position or physical
state
power (P) - ANS the rate of doing work, or work per unit time, measured in ft-lbs/sec or
horsepower
power control lever (PCL) - ANS control on a propeller driven airplane or helicopter, that
adjusts the fuel flow and therefore the power output of the engine(s). Similar to the throttle on
a jet aircraft.
power required (Pr) - ANS The power required to produce enough thrust to overcome drag in
level equilibrium flight.
2026 STUDY MATERIAL @COPYRIGHT RESERVED 3
