CDL General Knowledge Practice Test Part 5

1. What is the proper steering method recommended for commercial motor vehicles?

2. You are driving a loaded tractor-semitrailer on a two-lane highway approaching a sharp curve with a posted speed limit of 35 MPH. You are currently traveling at 50 MPH. What is the correct procedure for negotiating this curve safely?

3. You are driving a 40-foot straight truck at 45 MPH on a city street. A passenger vehicle is tailgating you closely from behind, leaving insufficient space. What is the safest response to this tailgating situation?

4. Under FMCSA regulations, when are headlights required to be illuminated on a commercial motor vehicle?

5. You are driving a tractor-semitrailer at 55 MPH on a wet highway during heavy rain. You notice that the steering feels light and the vehicle is not responding normally to steering inputs. You suspect hydroplaning is occurring. What is the correct immediate response?

6. You are driving a loaded tractor-semitrailer on a mountain downgrade when you notice your brakes are beginning to fade—the brake pedal feels soft, and stopping power is reduced despite normal pedal pressure. You have been using the brakes frequently to control speed on the grade. What is the correct immediate response to brake fade on a downgrade?

7. You are driving a school bus approaching a railroad-highway grade crossing with passive warning signs (crossbuck signs only, no flashing lights or gates). You have stopped within 50 feet but not closer than 15 feet from the nearest rail and checked both directions. No train is visible or audible. While crossing, your bus stalls on the tracks with 30 students aboard. What is the correct immediate procedure?

8. A commercial driver is stopped at a weigh station for a routine inspection. The officer observes signs that the driver may have consumed alcohol and requests a breath test. The driver refuses to submit to the alcohol test. Under FMCSA regulations and 49 CFR Part 383, what disqualification penalty applies for refusing an alcohol test while operating a CMV?

9. You are driving a loaded tractor-semitrailer at 55 MPH when you spot a hazard ahead that requires you to stop. Your perception time is 1 second, your reaction time is 1 second, and your vehicle’s braking distance at 55 MPH on dry pavement is approximately 250 feet. Additionally, your air brake system has a lag time of approximately 1/2 second. What is your approximate total stopping distance?

10. Which statement accurately describes the proper use of the engine brake (jake brake) on a commercial motor vehicle?