Home › CDL Practice Tests › Combination Vehicles Questions › Question 211
When building a set of doubles, where should the heavier semi-trailer be placed?
- A.In the rear position, so it steadies the front trailer
- B.It makes no difference which trailer is heavier
- C.In the first position, directly behind the tractor, with the lighter trailer behind it
- D.The heavier trailer goes behind only when it is empty
Correct answer
C. In the first position, directly behind the tractor, with the lighter trailer behind it
Why
A heavier front trailer and lighter rear trailer is the stable arrangement, because a heavy rear trailer can whip and push the lighter front trailer around. Weight order is a stability rule, not a loading convenience.
Manual topic: Combination Vehicles - Doubles and Triples · From the Combination Vehicles practice bank (CV-211).