When coupling, you should back the tractor up:

Slowly.. Section 6.4: Back slowly to avoid damaging the kingpin or fifth wheel.

When coupling, you should back the tractor up:

ANSWER BREAKDOWN
  • A. Incorrect. "Fast." is not correct. Back slowly to avoid damaging the kingpin or fifth wheel.
  • B. Correct. Back slowly to avoid damaging the kingpin or fifth wheel.
  • C. Incorrect. "At an angle." is not correct. Back slowly to avoid damaging the kingpin or fifth wheel.
  • D. Incorrect. "Without looking." is not correct. Back slowly to avoid damaging the kingpin or fifth wheel.