To uncouple the rear trailer, you should:

Park on level ground, apply parking brakes, lower landing gear, and disconnect lines.. Section 7.2: Standard uncoupling procedure: Park

To uncouple the rear trailer, you should:

ANSWER BREAKDOWN
  • A. Incorrect. "Pull the dolly out from under it." is not correct. Standard uncoupling procedure: Park safe, chock wheels, lower landing gear, disconnect lines, release jaws.
  • B. Correct. Standard uncoupling procedure: Park safe, chock wheels, lower landing gear, disconnect lines, release jaws.
  • C. Incorrect. "Drive fast." is not correct. Standard uncoupling procedure: Park safe, chock wheels, lower landing gear, disconnect lines, release jaws.
  • D. Incorrect. "Uncouple the first trailer first." is not correct. Standard uncoupling procedure: Park safe, chock wheels, lower landing gear, disconnect lines, release jaws.