Avit 323 Exam 3 UPDATED ACTUAL Exam
Questions and CORRECT Answers
What is the main reason there is a difference between the rated HP of the engine and the force
that moves an airplane forward? - CORRECT ANSWER - A prop is an airfoil that is not
100% efficient
What generally happens to engine performance as altitude increases? - CORRECT
ANSWER - Decreases
What generally happens to performance as weight decreases? - CORRECT ANSWER -
Increases
Explain the three types of hydroplaning and what causes them - CORRECT ANSWER - a.
dynamic- high speeds +standing water
b. viscous- wet, painted surfaces of runway
c. reverted rubber-locked brakes
List all the forces the tail-down force must equal in level flight. - CORRECT ANSWER -
Lift weight coupling
Thrust (pendulum)
Drag
Wing
Fuselage
What exactly is L/D max, and what affects it? - CORRECT ANSWER - An angle of attack
Nothing affects it
Range - CORRECT ANSWER - total distance transverse on a tank of fuel
, Endurance - CORRECT ANSWER - total time plane can be in the air on a tank of fuel
As speed increases, what drag goes up? What drag goes down? - CORRECT ANSWER -
Parasite increases
induced decreases
Explain each variable in the sum-of-all-forces equation. - CORRECT ANSWER -T
(thrust) - D(drag) - Cfriction (W(weight) - L(lift)
CFriction - CORRECT ANSWER - % of net weight that can be converted to frictional
force
We know the three variables for air density are temperature, pressure, and humidity. Explain how
each affects air density. - CORRECT ANSWER - Temp= inversely
Pressure= directly
Humidity= inversely
Explain why an approach angle manipulates inertia. - CORRECT ANSWER - When you
are at a steeper speed your is in the vertical which minimizes the horizontal component of inertia
reducing flare distance
Newtons 1st law - CORRECT ANSWER - Object in Motion tends to stay in motion unless
acted upon by an outside force
Newtons 2nd law - CORRECT ANSWER - Force = mass x acceleration
Newtons 3rd Law - CORRECT ANSWER - Every action has an equal but opposite
reaction
Questions and CORRECT Answers
What is the main reason there is a difference between the rated HP of the engine and the force
that moves an airplane forward? - CORRECT ANSWER - A prop is an airfoil that is not
100% efficient
What generally happens to engine performance as altitude increases? - CORRECT
ANSWER - Decreases
What generally happens to performance as weight decreases? - CORRECT ANSWER -
Increases
Explain the three types of hydroplaning and what causes them - CORRECT ANSWER - a.
dynamic- high speeds +standing water
b. viscous- wet, painted surfaces of runway
c. reverted rubber-locked brakes
List all the forces the tail-down force must equal in level flight. - CORRECT ANSWER -
Lift weight coupling
Thrust (pendulum)
Drag
Wing
Fuselage
What exactly is L/D max, and what affects it? - CORRECT ANSWER - An angle of attack
Nothing affects it
Range - CORRECT ANSWER - total distance transverse on a tank of fuel
, Endurance - CORRECT ANSWER - total time plane can be in the air on a tank of fuel
As speed increases, what drag goes up? What drag goes down? - CORRECT ANSWER -
Parasite increases
induced decreases
Explain each variable in the sum-of-all-forces equation. - CORRECT ANSWER -T
(thrust) - D(drag) - Cfriction (W(weight) - L(lift)
CFriction - CORRECT ANSWER - % of net weight that can be converted to frictional
force
We know the three variables for air density are temperature, pressure, and humidity. Explain how
each affects air density. - CORRECT ANSWER - Temp= inversely
Pressure= directly
Humidity= inversely
Explain why an approach angle manipulates inertia. - CORRECT ANSWER - When you
are at a steeper speed your is in the vertical which minimizes the horizontal component of inertia
reducing flare distance
Newtons 1st law - CORRECT ANSWER - Object in Motion tends to stay in motion unless
acted upon by an outside force
Newtons 2nd law - CORRECT ANSWER - Force = mass x acceleration
Newtons 3rd Law - CORRECT ANSWER - Every action has an equal but opposite
reaction
