Landing Gear Fundamentals and Service Part 2

Question 1

1. Two (2) common types of landing gear are:
   a)
   b)

Answer 1

a) drop-leg

b) gear-operated landing gear

Question 2

2. The condition where gear set input speed is reduced and torque is increased. is called:
   a) a gear ratio.
   b) an overdrive.
   c) an underdrive.
   d) a direct drive.

Answer 2

c) an underdrive.

Question 3

3. A gear set has an input gear with 22 teeth and an output gear with 83 teeth.
   a) The resulting gear ratio is
   b) The ratio is called

Answer 3

a) 3.77:1

b) an underdrive or gear reduction

Question 4

4. When a gear-operated landing gear is operated in low speed, crankshaft speed is
   - ——– through gears before being applied to the lift screw.
   a) directly transmitted
   b) overdriven
   c) reduced
   d) reduced three times

Answer 4

c) reduced.

Question 5

5. During high-speed operation, the gear box in the landing gear provides a gear ratio of
6. 62:1. This ratio is a/an:
   a) direct drive
   b) reduction
   c) double reduction
   d) overdrive

Answer 5

d) overdrive

Question 6

6. Lifting and lowering the trailer must be done with the landing gear in high speed.
   a) true
   b) false

Answer 6

b) false; Lifting and lowering must be done in low speed to prevent damage to the
gear set.

Question 7

7. If the landing gear will not stay in gear while cranking, a possible cause could be:
   a) lack of lubrication.
   b) gear pins sheared in the gearbox.
   c) faulty shift ball and spring.
   d) damaged lift screw.

Answer 7

c) faulty shift ball and spring.

Question 8

8. The gears in the landing gear are lubricated with:
   a) light oil.
   b) grease.
   c) diesel oil.
   d) gear oil.

Answer 8

b) grease.