Why must the landing gear be raised all the way before driving?

A.It improves fuel use only
B.Half-raised gear helps in turns
C.It is only a cosmetic rule
D.Partially raised gear can catch on railroad tracks, curbs, or uneven ground and damage the trailer or cause a crash

Correct answer

D. Partially raised gear can catch on railroad tracks, curbs, or uneven ground and damage the trailer or cause a crash

Why

Landing gear legs hang low near the ground. Leaving them partly down invites a strike that can tear the gear off and destabilize the trailer.

Manual topic: Combination Vehicles - Coupling · From the Combination Vehicles practice bank (CV-020).