When checking the trailer emergency brakes, the tractor protection control valve should be placed in the ___ position.

Emergency. Section 6.5: To check emergency brakes, you charge the system, then disconnect the red line or pull the knob out (Emergency

When checking the trailer emergency brakes, the tractor protection control valve should be placed in the ___ position.

ANSWER BREAKDOWN
  • A. Incorrect. "Normal" is not correct. To check emergency brakes, you charge the system, then disconnect the red line or pull the knob out (Emergency position) to see if brakes hold.
  • B. Correct. To check emergency brakes, you charge the system, then disconnect the red line or pull the knob out (Emergency position) to see if brakes hold.
  • C. Incorrect. "Neutral" is not correct. To check emergency brakes, you charge the system, then disconnect the red line or pull the knob out (Emergency position) to see if brakes hold.
  • D. Incorrect. "Driving" is not correct. To check emergency brakes, you charge the system, then disconnect the red line or pull the knob out (Emergency position) to see if brakes hold.