LESSONS 1, 2, and 3
PRACTICE EXERCISES
The following items will test your grasp of the material covered in these lessons. There is only one
correct answer for each item. When you complete the exercise, check your answer with the answer key
that follows. If you answer any item incorrectly, study again that part of the lesson which contains the
portion involved.
True - False
Write T for true or F for false).
1.
On an aircraft having aerodynamically clean characteristics, speed brakes are used to improve the
rate of ascent.
2.
The surfaces of a wing or rotor blade are designed to produce lift when air passes over it. Two-
thirds of the lift is produced by the lower pressure air passing over the wing's or blade's upper
surface.
3.
The rotor system is using from 20 to 100 percent of the available power and the horizontal velocity
is 10 knots or less. Under this condition a pilot may experience settling with power.
4.
The lateral axis runs from wing tip to wing tip.
5.
The man who first sketched the helicopter and referred to it as a helixopteron was Giovanni
Venturi.
6.
Sir Isaac Newton's third law of motion is: for every action there is an equal and opposite reaction.
7.
Improved lift and airfoil efficiency while operating in ground effect are due to the recirculation of
the main rotor tip vortex.
8.
The term "standard conditions" refers to atmospheric pressure of approximately 14.7 psi or 29.92
inches of mercury at sea level with a temperature of 15C.
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AL0966
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