1. Driver Maria completes her pre-trip inspection at 6:00 AM and discovers that the steering gear box shows visible fluid leakage and the steering wheel has 3 inches of free play. She reports this on her DVIR and informs her dispatcher. The dispatcher tells her that the delivery schedule is critical and instructs her to “just be extra careful” and proceed with the route. What is Maria’s correct response under federal regulations?

2. A driver operating under the 70-hour/8-day limit has accumulated the following on-duty hours over the past 7 days: Day 1 (10 hours), Day 2 (9 hours), Day 3 (11 hours), Day 4 (8 hours), Day 5 (10 hours), Day 6 (9 hours), Day 7 (10 hours). How many on-duty hours does the driver have available on Day 8 before reaching the 70-hour limit?

3. Which type of air brake is operated by the foot pedal during normal driving to slow or stop the vehicle?

4. You are driving a tractor-semitrailer on a rain-slicked highway when you feel the trailer begin to slide sideways toward the right. The tractor remains straight, but the trailer is drifting out of alignment—a condition known as trailer jackknife. What is the correct procedure to recover from this skid?

5. A driver traveling on a rural highway at night encounters a section of road where black ice has formed on bridges and overpasses. The temperature is 28°F, and the road appears dry in most sections. The driver notices the vehicle beginning to slide slightly when crossing a bridge. What environmental cues should have alerted the driver to black ice risk, and what driving adjustments should have been made proactively?

6. What is the primary reason that driver fatigue is considered as dangerous as alcohol impairment for commercial motor vehicle operation?

7. A driver operating a 65-foot combination vehicle is making a right turn at an intersection. The driver notices that during the turn, the trailer’s rear wheels are tracking significantly closer to the curb than expected and are about to jump the curb onto a sidewalk where pedestrians are walking. What corrective action should the driver take?

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

9. A driver is transporting a single metal coil weighing 22,000 lbs on a flatbed trailer equipped with a metal coil rack (cradle). The coil is placed in the cradle with the eye of the coil oriented vertically (eye-to-the-sky configuration). Under 49 CFR Part 393 Subpart J specialized cargo requirements for metal coils, analyze the securement requirements and determine the correct tiedown configuration.

10. What is the federal maximum weight limit for a tandem axle group under bridge formula regulations?

11. According to 49 CFR Section 396.17, how often must a commercial motor vehicle undergo an annual inspection?

12. Which medical condition is specifically listed as disqualifying for commercial driver medical certification under 49 CFR Part 391?

13. When approaching a railroad-highway grade crossing, what gear selection action must a driver take before reaching the crossing?

14. During the walk-around inspection of a Class A tractor, the driver checks the exhaust system and observes that the exhaust pipe mounting bracket is loose, allowing the pipe to vibrate during engine operation. The exhaust pipe itself shows no cracks or holes, and exhaust gases are properly directed away from the cab. The exhaust system otherwise appears functional. What should the driver determine about this condition?

15. What is the formula for calculating minimum safe following distance for a commercial motor vehicle, and what factors require increasing this distance beyond the minimum?

16. A driver is performing the air brake system inspection on a Class B straight truck with air brakes. With the engine running, the driver fans the brake pedal to reduce air pressure and observe when the low-pressure warning device activates. The warning light and buzzer activate at 55 PSI. Based on FMCSA requirements, what should the driver determine about this condition?

17. During the alley dock exercise, a CDL applicant’s vehicle touches but does not cross the final boundary line at the dock position. The examiner records an encroachment. The applicant argues that touching the line is not the same as crossing it. Which statement accurately describes AAMVA Section 12M scoring on boundary lines?

18. A driver is operating a 70-foot combination vehicle through an urban area with narrow streets. The driver must cross an intersection where oncoming traffic is waiting to turn left. The driver’s vehicle requires a wide right turn at the next intersection. Which analysis correctly describes the right-of-way situation?

19. A mechanic explains that a vehicle’s slack adjusters need to be checked during pre-trip inspection. What is the function of slack adjusters, and why is their proper adjustment critical?

20. What is the federal maximum weight limit for a single axle under the bridge formula regulations?

21. A driver operating a tractor-semitrailer combination at 55 MPH on a dry highway encounters an emergency: a passenger car has stopped suddenly in the lane ahead. The driver applies maximum braking force. During this emergency stop, the driver feels the vehicle begin to slide and sees the trailer starting to swing to the right. Which analysis explains what is occurring and what should the driver do?

22. Which steering method is recommended for operating commercial motor vehicles and why is it preferred over the hand-over-hand method?

23. Which type of brake is held in the applied position by spring pressure and released when air pressure is applied?

24. A driver conducts a pre-trip inspection and checks the required emergency equipment in the cab. The driver finds a fire extinguisher with a gauge showing it is fully charged, three reflective triangles in good condition, and a box containing six spare electrical fuses of various amperages. The vehicle’s electrical system uses circuit breakers instead of fuses. Which determination about emergency equipment compliance is correct?

25. A CDL driver has been on duty for 10 hours and notices signs of fatigue including heavy eyelids, frequent yawning, and difficulty concentrating. The driver has 3 hours remaining on the 14-hour on-duty limit. What is the safest action to take?

26. A driver is backing a loaded tractor-semitrailer on an icy parking lot. As the driver steers to align the trailer with a dock, the rear of the trailer begins to slide sideways despite slow backing speed. The driver recognizes this as a trailer skid during backing. What is the correct response to recover control of the trailer?

27. What is the maximum on-duty time limit for passenger-carrying drivers under 49 CFR 395.5(a)(2)?

28. A driver operating a 65-foot tractor-semitrailer approaches a railroad crossing with three parallel tracks. The driver stops at the proper distance (15-50 feet) and sees one track is clear with no train visible from either direction. Traffic is heavy on the road beyond the crossing, with vehicles backed up approximately 40 feet past the tracks. What should the driver do?

29. A driver is operating a Class B bus on a divided highway when the right rear tire blows out. The bus begins drifting toward the right shoulder. The driver applies brakes immediately, and the bus swerves sharply left across two lanes before stabilizing. What error did the driver make, and what should have been done differently?

30. A driver weighing his combination vehicle at a CAT scale obtains the following readings: steer axle 11,500 lbs, drive axle 22,500 lbs, trailer tandem 34,000 lbs, gross weight 68,000 lbs. The driver has sliding tandem axles on the trailer. Analyze this configuration and determine what adjustment is needed to achieve legal compliance.

31. When inspecting the electrical cord connection between tractor and trailer during a Class A pre-trip inspection, what three verification steps must the driver perform?

32. During offset backing (right offset), your tractor-trailer combination starts aligned in the left lane and must end aligned in the right lane, parallel to the starting position. Midway through the maneuver, you realize the trailer angle is too sharp and the rear is approaching the right boundary. What analysis should guide your next action?

33. A CDL driver is performing a pre-trip inspection and discovers the following conditions: engine oil level is at the minimum mark on the dipstick, coolant level is slightly below the overflow tank minimum, belt deflection measures 1 inch, and steering wheel play measures 2-1/2 inches. Which analysis correctly identifies the vehicle’s operational status?

34. A CDL driver is operating a tractor-semitrailer at 55 mph on a rural highway at 11:30 PM. Visibility is clear, and no other vehicles are visible ahead. The driver notices they have been on the road for 9 hours with only one 30-minute break. Which symptom indicates the driver should stop immediately for rest?

35. When using the push-pull steering method for making turns, how should your hands move the steering wheel?

36. Which statement about the 34-hour restart provision is correct for passenger-carrying drivers?

37. Which statement accurately describes the stopping distance difference between a loaded and an empty commercial motor vehicle with air brakes?

38. A driver is performing an applied leak test on a combination vehicle. After building pressure to 120 PSI, applying the brake pedal firmly, and holding it for one minute, the air pressure drops from 95 PSI to 89 PSI. What is the correct assessment of this result?

39. A driver needs to back a tractor-trailer into a loading dock. The dock is located to the driver’s right, and there is limited space on the passenger side. The driver must decide how to approach the backing maneuver. What is the best approach?

40. A driver is operating a combination vehicle on the highway and notices the coolant temperature gauge rising steadily toward the red zone. The engine temperature has not yet reached critical levels, but the trend is concerning. What is the correct procedure for addressing this situation?

41. Which backing direction is preferred when maneuvering a commercial vehicle into a loading dock or parking space?

42. A driver is approaching a highway interchange with a curved exit ramp while hauling a loaded trailer with cargo stacked high in the trailer body. The posted ramp speed limit is 35 MPH, and the driver is traveling at 45 MPH. What factor most significantly increases the rollover risk in this situation?

43. After backing under a trailer and connecting the fifth wheel to the kingpin, which method confirms that the fifth wheel is properly locked?

44. A driver is approaching a railroad crossing while descending a slight grade. The vehicle is a loaded tractor-semitrailer weighing 65,000 lbs. The driver had shifted to a lower gear earlier for the descent and is now in 8th gear at 35 mph. The crossing has no active signals. Which analysis of gear selection and crossing procedure is correct?

45. A driver is approaching a steep downhill curve on a mountain highway. The driver notices the trailer has a high-mounted load (cargo stacked near the roof). Which combination of actions BEST reduces rollover risk while managing the downgrade safely?

46. A commercial driver has been driving for 7 hours and notices increasing fatigue symptoms: occasional yawning, slight difficulty focusing on distant objects, and the need to adjust seating position frequently. The driver is maintaining a 65-foot tractor-semitrailer at 55 mph with 7 seconds following distance. What is the correct response?

47. A driver needs to uncouple a tractor from a semitrailer at a truck stop. What is the correct sequence of steps for the uncoupling procedure?

48. A driver testing service brakes during pre-trip inspection moves the vehicle forward at 5 MPH and applies the brakes. The vehicle pulls hard to the right during stopping, and the brake pedal feels firm without going to the floor. What should the driver conclude about this brake test result?

49. You are driving a loaded tractor-semitrailer on a highway when a tire on the right front steer axle suddenly blows out. The vehicle pulls sharply toward the right and steering becomes difficult. What is the correct sequence of actions to safely recover from this tire blowout?

50. A CDL driver is operating a 65-foot combination vehicle on a highway at 55 mph. How far ahead should the driver be looking to anticipate hazards and plan responses?