You are doing a walkaround inspection of a double trailer. You should make sure the converter dolly air tank drain valve is:

Closed.. Section 7.3: The drain valve must be closed to hold air pressure.

You are doing a walkaround inspection of a double trailer. You should make sure the converter dolly air tank drain valve is:

ANSWER BREAKDOWN
  • A. Incorrect. "Open." is not correct. The drain valve must be closed to hold air pressure.
  • B. Correct. The drain valve must be closed to hold air pressure.
  • C. Incorrect. "Missing." is not correct. The drain valve must be closed to hold air pressure.
  • D. Incorrect. "Connected to the horn." is not correct. The drain valve must be closed to hold air pressure.