Home › CDL Practice Tests › Combination Vehicles Questions › Question 36
What is the best surface and position for uncoupling a trailer?
- A.On a steep grade so the tractor rolls clear easily
- B.Straight in line, on firm, level ground that will support the trailer on its landing gear
- C.At an angle so the gear bears less weight
- D.On soft grass so the gear sinks in and holds
Correct answer
B. Straight in line, on firm, level ground that will support the trailer on its landing gear
Why
Level, firm ground keeps the trailer stable after the tractor leaves and prevents the landing gear from sinking or the trailer from rolling. A straight position also makes the next coupling easier.
Manual topic: Combination Vehicles - Uncoupling · From the Combination Vehicles practice bank (CV-036).