After you lock the kingpin into the fifth wheel, you should check the connection by:

Pulling the tractor ahead gently with the trailer brakes locked.. Section 6.4: This is called the 'Tug Test'. Pull gently against the

After you lock the kingpin into the fifth wheel, you should check the connection by:

ANSWER BREAKDOWN
  • A. Incorrect. "Driving away fast." is not correct. This is called the 'Tug Test'. Pull gently against the locked trailer brakes to ensure the kingpin is locked.
  • B. Correct. This is called the 'Tug Test'. Pull gently against the locked trailer brakes to ensure the kingpin is locked.
  • C. Incorrect. "Backing up." is not correct. This is called the 'Tug Test'. Pull gently against the locked trailer brakes to ensure the kingpin is locked.
  • D. Incorrect. "Asking a helper." is not correct. This is called the 'Tug Test'. Pull gently against the locked trailer brakes to ensure the kingpin is locked.