Which of these steps comes FIRST when uncoupling?

Position the rig.. Section 6.4: First, position the rig on firm, level ground.

Which of these steps comes FIRST when uncoupling?

ANSWER BREAKDOWN
  • A. Incorrect. "Lower the landing gear." is not correct. First, position the rig on firm, level ground.
  • B. Incorrect. "Disconnect air lines." is not correct. First, position the rig on firm, level ground.
  • C. Correct. First, position the rig on firm, level ground.
  • D. Incorrect. "Unlock the fifth wheel." is not correct. First, position the rig on firm, level ground.