Home › CDL Practice Tests › Combination Vehicles Questions › Question 39
Why use low gear on the landing gear crank when the trailer is loaded?
- A.Low gear gives the mechanical advantage needed to lift and support a heavy trailer safely
- B.Low gear makes the legs drop faster
- C.Gear choice does not affect effort
- D.High gear is required for loaded trailers
Correct answer
A. Low gear gives the mechanical advantage needed to lift and support a heavy trailer safely
Why
Lifting thousands of pounds on the gear by hand is only practical with the low-speed, high-torque gear. It also gives finer control as the weight transfers off the fifth wheel.
Manual topic: Combination Vehicles - Uncoupling · From the Combination Vehicles practice bank (CV-039).