NIFE Aerodynamics - Unit 1 Exam
Questions and Answers 100% Pass
Vector - ✔✔A quantity that has magnitude and direction. Resultant vector may be
divided into separate components.
Density (rho) - ✔✔Mass per unit volume
Moment - ✔✔A rotational force around a point or axis
Equilibrium Flight - ✔✔Exists when the sum of all forces and the sum of all moments
around the center of gravity are equal to zero.
Trimmed Flight - ✔✔Exists when the sum of all moments around the center of gravity
is equal to zero.
Temperature vs Altitude - ✔✔Decreases linearly with an increase in altitude at a rate of
2 deg C per 1000 ft until approximately 36,000 ft. After 36,000 ft, the temperature is
constant (isothermal)
Humidity vs Air density - ✔✔As humidity increases, air density decreases
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, General Gas Law - ✔✔Sets the relationship between three properties of air: pressure (P),
density (ρ), and temperature (T).
P=ρRT (R is a constant for any given gas)
Steady Airflow - ✔✔Exists if at every point in the airflow static pressure, density,
temperature, and velocity remain constant over time.
Continuity equation - ✔✔A1V1=A2V2
Bernoulli's Equation - ✔✔Total pressure (Pt) equals static pressure (Ps) plus dynamic
pressure (q)
Pt=Ps+q
q=(1/2)*ρ*(V^2)
Order of Airspeeds - ✔✔Indicated Airspeed (IAS)
Calibrated Airspeed (CAS)
Equivalent Airspeed (EAS)
True Airspeed (TAS)
Ground Speed
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Questions and Answers 100% Pass
Vector - ✔✔A quantity that has magnitude and direction. Resultant vector may be
divided into separate components.
Density (rho) - ✔✔Mass per unit volume
Moment - ✔✔A rotational force around a point or axis
Equilibrium Flight - ✔✔Exists when the sum of all forces and the sum of all moments
around the center of gravity are equal to zero.
Trimmed Flight - ✔✔Exists when the sum of all moments around the center of gravity
is equal to zero.
Temperature vs Altitude - ✔✔Decreases linearly with an increase in altitude at a rate of
2 deg C per 1000 ft until approximately 36,000 ft. After 36,000 ft, the temperature is
constant (isothermal)
Humidity vs Air density - ✔✔As humidity increases, air density decreases
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, General Gas Law - ✔✔Sets the relationship between three properties of air: pressure (P),
density (ρ), and temperature (T).
P=ρRT (R is a constant for any given gas)
Steady Airflow - ✔✔Exists if at every point in the airflow static pressure, density,
temperature, and velocity remain constant over time.
Continuity equation - ✔✔A1V1=A2V2
Bernoulli's Equation - ✔✔Total pressure (Pt) equals static pressure (Ps) plus dynamic
pressure (q)
Pt=Ps+q
q=(1/2)*ρ*(V^2)
Order of Airspeeds - ✔✔Indicated Airspeed (IAS)
Calibrated Airspeed (CAS)
Equivalent Airspeed (EAS)
True Airspeed (TAS)
Ground Speed
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