13
2-36. What action takes place when an outside
force attempts to tilt the spin axis of a
gyro?
1. The gyro precesses in the direction of
the applied force
2. The gyro precesses in a direction
opposite to the applied force
3. The gyro precesses in a direction at a
right angle to the applied force
4. The gyro remains fixed in its original
position
2-37. For a gyro to be universally mounted, it
MUST have a total of how many
gimbals, if any?
1. One
2. Two
3. Three
4. None
2-38. Of the following factors, which one does
NOT affect rigidity?
1. Rotor speed
2. Rotor shape
3. Rotor weight
4. Rotor position
2-39. The forces that act through the center of
gravity of a gyro and do NOT cause
precession are referred to by what term?
1. Forces of translation
2. Forces of induction
3. Forces of isolation
4. Forces of erection
2-40. Which of the following factors
determine(s) the amount of precession
that will result from a given applied
force?
1. Rotor speed
2. Rotor weight
3. Rotor shape
4. All of the above
2-41. Which of the following factors
determine(s) the direction a gyro will
precess in response to a particular force?
1. Speed of the rotor's spin
2. Shape of the rotor
3. Direction of the rotor's spin
4. All of the above
Figure 2B.—Rotors of equal weights but different
shapes.
IN ANSWERING QUESTION 2-42, REFER
TO FIGURE 2B.
2-42. If all of the rotors are rotated at the same
speed, which one will have the greatest
rigidity?
1. A
2. B
3. C
4. D
2-43. According to the right-hand rule for gyro
precession, what does the thumb
indicate?
1. Spin vector and axis
2. Torque vector and axis
3. Precession vector and axis
4. Axis of rotor rotation only
