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 - Prop inefficiency
What generally happens to the engine performance as altitude increases - CORRECT
ANSWER - Engine Performance decreases
What generally happens to engine performance as weight decreases - CORRECT
ANSWER - Engine Performance increases
Explain the three types of hydroplaning and what causes them - CORRECT ANSWER -
Dynamic - high speeds + standing water
Viscous - wet painted runway surface
reverted Rubba - locked up brakes
List all the forces the tail-down force must equal in-flight (5 items) - CORRECT
ANSWER - 1. Must equal the lift-weight coupling
2. Pendulum effect (Nose up or down, depending on where the engines are to the waterline)
3. Drag (nose up or down
4. Wing (nose up)
5. Fuselage (nose up or down - destabilize)
, What is L/Dmax and what affects it? - CORRECT ANSWER - L/Dmax is an AOA and
nothin affects it
What is the definition of Range? - CORRECT ANSWER - How far the aircraft can go
What is the definition of Endurance - CORRECT ANSWER - How long the aircraft can
stay aloft on one tank
As speed increases, what drag goes up? - CORRECT ANSWER - Parasite drag
As speed increases, what drag goes down - CORRECT ANSWER - Induced drag
What is the Sum of all forces equation. Explain each item. - CORRECT ANSWER - Σf =
T-D-f(W-L)
T- thrust of the aircraft
D- drag
F- friction
W- weight
L - lift
Explain how temperature effects air density - CORRECT ANSWER - High temp - Low
density
Low temp - high density
Explain how pressure effects air density - CORRECT ANSWER - High pressure - high
density