When checking the trailer air brakes, you should ensure that:

All of the above.. Section 6.2 & 6.5: All of these are critical checks for the air system.

When checking the trailer air brakes, you should ensure that:

ANSWER BREAKDOWN
  • A. Incorrect. "The air lines are not crossed." is not correct. Section 6.2 & 6.5: All of these are critical checks for the air system.
  • B. Incorrect. "The glad hands are locked." is not correct. Section 6.2 & 6.5: All of these are critical checks for the air system.
  • C. Incorrect. "There are no leaks." is not correct. Section 6.2 & 6.5: All of these are critical checks for the air system.
  • D. Correct. Section 6.2 & 6.5: All of these are critical checks for the air system.