NIFE - Aero Review UPDATED ACTUAL
Questions and CORRECT Answers
What is density? - CORRECT ANSWER- ✔✔rho (ρ) - mass per unit of volume
What happens to density if you increase humidity? - CORRECT ANSWER- ✔✔Density
decreases (inverse relationship)
What's a moment? - CORRECT ANSWER- ✔✔Rotational force around a point.
What is a moment arm? - CORRECT ANSWER- ✔✔Distance from the force.
How do you find the moment? - CORRECT ANSWER- ✔✔Force x Distance
What is static pressure? - CORRECT ANSWER- ✔✔The amount weight/air molecules above
you.
What is the gas law? - CORRECT ANSWER- ✔✔P = ρRT
If pressure remains constant, and density goes up, what happens to temperature? - CORRECT
ANSWER- ✔✔It must go down (Gas Law: P = ρRT)
What four conditions are required for steady airflow? - CORRECT ANSWER-
✔✔Temperature, density, veolcity, and pressure must remain constant
Describe the 5 airspeeds - CORRECT ANSWER- ✔✔ICETG: Instrument Air Speed,
Calibrated Air Speed, Equivalent Air Speed, True Air Speed, and Ground Speed
How does the plane determine instrument air speed? - CORRECT ANSWER- ✔✔Pito tube
measures total pressure. Static air ports measure static pressure. Dynamic Pressure = Total -
Static --> convert to knots
, How is calibrated air speed calculated? - CORRECT ANSWER- ✔✔Indicated air speed
adjusted for instrument error
How is equivalent air speed calculated? - CORRECT ANSWER- ✔✔Calibarated air speed
adjusted for compressibility
How is true air speed calculated? - CORRECT ANSWER- ✔✔Equivalent air speed adjusted
for density
What is true air speed? - CORRECT ANSWER- ✔✔The speed at which the airplane is
traveling through the air mass
How is ground speed calculated? - CORRECT ANSWER- ✔✔True air speed adjusted for
wind
How does a headwind affect ground speed? - CORRECT ANSWER- ✔✔Slower than true air
speed
How does a tail wind affect ground speed? - CORRECT ANSWER- ✔✔Faster than true air
speed
At a constant indicated air speed, you are flying at 5,000 ft with a 10kt headwind. You climb
to 10,000ft again with a 10kt head wind. What will happen to ground speed? - CORRECT
ANSWER- ✔✔It will increase because the true air speed increases (density is going down,
but indicated air speed is staying the same)
What is the mean camber line? - CORRECT ANSWER- ✔✔Locus of ponts halfway between
the upper and lower surface of the wing
What is the chord line? - CORRECT ANSWER- ✔✔Straight line from leading edge to
trailing edge of the wing
Questions and CORRECT Answers
What is density? - CORRECT ANSWER- ✔✔rho (ρ) - mass per unit of volume
What happens to density if you increase humidity? - CORRECT ANSWER- ✔✔Density
decreases (inverse relationship)
What's a moment? - CORRECT ANSWER- ✔✔Rotational force around a point.
What is a moment arm? - CORRECT ANSWER- ✔✔Distance from the force.
How do you find the moment? - CORRECT ANSWER- ✔✔Force x Distance
What is static pressure? - CORRECT ANSWER- ✔✔The amount weight/air molecules above
you.
What is the gas law? - CORRECT ANSWER- ✔✔P = ρRT
If pressure remains constant, and density goes up, what happens to temperature? - CORRECT
ANSWER- ✔✔It must go down (Gas Law: P = ρRT)
What four conditions are required for steady airflow? - CORRECT ANSWER-
✔✔Temperature, density, veolcity, and pressure must remain constant
Describe the 5 airspeeds - CORRECT ANSWER- ✔✔ICETG: Instrument Air Speed,
Calibrated Air Speed, Equivalent Air Speed, True Air Speed, and Ground Speed
How does the plane determine instrument air speed? - CORRECT ANSWER- ✔✔Pito tube
measures total pressure. Static air ports measure static pressure. Dynamic Pressure = Total -
Static --> convert to knots
, How is calibrated air speed calculated? - CORRECT ANSWER- ✔✔Indicated air speed
adjusted for instrument error
How is equivalent air speed calculated? - CORRECT ANSWER- ✔✔Calibarated air speed
adjusted for compressibility
How is true air speed calculated? - CORRECT ANSWER- ✔✔Equivalent air speed adjusted
for density
What is true air speed? - CORRECT ANSWER- ✔✔The speed at which the airplane is
traveling through the air mass
How is ground speed calculated? - CORRECT ANSWER- ✔✔True air speed adjusted for
wind
How does a headwind affect ground speed? - CORRECT ANSWER- ✔✔Slower than true air
speed
How does a tail wind affect ground speed? - CORRECT ANSWER- ✔✔Faster than true air
speed
At a constant indicated air speed, you are flying at 5,000 ft with a 10kt headwind. You climb
to 10,000ft again with a 10kt head wind. What will happen to ground speed? - CORRECT
ANSWER- ✔✔It will increase because the true air speed increases (density is going down,
but indicated air speed is staying the same)
What is the mean camber line? - CORRECT ANSWER- ✔✔Locus of ponts halfway between
the upper and lower surface of the wing
What is the chord line? - CORRECT ANSWER- ✔✔Straight line from leading edge to
trailing edge of the wing
