CDL Full Practice Test Part 10

1. A driver is coupling a tractor to a trailer and has connected both air lines. What should the driver do NEXT to prepare the trailer brakes before backing under?

2. A driver has backed under a trailer and the fifth wheel has locked around the kingpin. Before raising the landing gear, what critical test must the driver perform?

3. A commercial driver visits a medical clinic for a DOT physical examination. The physician conducting the exam is not listed on the FMCSA National Registry of Certified Medical Examiners. The physician issues a Medical Examiner’s Certificate stating the driver is qualified. Which statement correctly describes the legal status of this medical certificate?

4. A truck driver approaches a right turn in a city with tight lanes. The turn requires the trailer to track close to the curb while avoiding encroaching on the adjacent lane. What is the correct sequence for this maneuver?

5. At approximately what PSI does the governor typically cut-out, signaling the air compressor to stop building pressure?

6. A driver is navigating dense fog on a two-lane rural road in a Class B straight truck. The driver cannot see the road edges clearly. Which reference should the driver use to maintain proper lane position?

7. Which component automatically protects the tractor’s air supply from trailer air line failures by closing when trailer air pressure drops suddenly?

8. What is the recommended steering method for Commercial Motor Vehicles (CMVs)?

9. A driver is operating an empty tractor-semitrailer on a dry interstate highway at 55 mph and needs to make an emergency stop. Which analysis correctly compares stopping distance performance between this empty CMV and the same vehicle fully loaded to 80,000 lbs?

10. What does GVWR stand for?