Practice question
For the Kentucky CDL Combination Vehicles test, which statement is correct about tractor protection valve?
- The tractor protection valve keeps tractor air if the trailer breaks away or leaks badly.
- Close every shut-off valve before moving the combination.
- Swing left before starting every right turn so traffic sees you.
- Use actual loaded weight instead of GVWR or GCWR for CDL class decisions.
Answer: A — The tractor protection valve keeps tractor air if the trailer breaks away or leaks badly.
The correct answer is shown above. Try the full quiz for additional practice.
Practice more: Kentucky CDL Combination Practice Questions - Kentucky CDL Combination Vehicles Test Exam →