Before coupling a rear trailer, you must align the dolly:

In line with the kingpin.. Section 7.2: Align the dolly with the kingpin of the rear trailer.

Before coupling a rear trailer, you must align the dolly:

ANSWER BREAKDOWN
  • A. Incorrect. "At a 90 degree angle." is not correct. Align the dolly with the kingpin of the rear trailer.
  • B. Correct. Align the dolly with the kingpin of the rear trailer.
  • C. Incorrect. "To the side." is not correct. Align the dolly with the kingpin of the rear trailer.
  • D. Incorrect. "By hand." is not correct. Align the dolly with the kingpin of the rear trailer.