Question

Which is true when uncoupling a rear trailer?

Accepted Answer

When on firm ground, park the rig straight.

Answer

To prevent the rig from moving, parking brakes should not be applied.

Answer

If the second trailer doesn't have spring brakes, never chock the wheels.

Answer

When removing the weight of the dolly, never lower the landing gear of the second semitrailer.

Question 10 - Doubles/Triples Test Practice Test for the CDL