1. A driver has loaded a dry van trailer and positioned most of the heavy cargo toward the rear of the trailer, leaving relatively light weight toward the front near the trailer nose. During the pre-trip inspection, the driver notes that the drive axle weight shows only 10,000 lbs on the CAT scale while the trailer tandem shows 34,000 lbs. What handling effects will this improper weight distribution create, and what should the driver do before departure?

2. A driver is operating a loaded tractor-semitrailer during extreme heat with ambient temperature at 110°F. What is the correct speed management approach to reduce tire blowout risk?

3. A driver needs to test the trailer brakes before coupling a tractor to a semitrailer. The driver has connected the air lines and supplied air to the trailer. Which control should the driver use to apply only the trailer brakes for this test?

4. When making a right turn with a tractor-semitrailer, why must the driver pull forward into the intersection before beginning the turn?

5. During a CDL skills test, an applicant must perform driver-side parallel parking with a tractor-semitrailer. The target space is approximately 75 feet long with a vehicle parked at the front end of the space. The applicant approaches correctly positioned but makes an error in the backing sequence that causes the trailer to approach the space at too sharp an angle. What correction should the applicant make to successfully complete the maneuver?

6. During the offset backing maneuver, a driver realizes they cannot complete the maneuver without crossing a boundary line. What should they do?

7. After backing under a trailer and coupling, what test should the driver perform to verify the fifth wheel is properly locked around the kingpin?

8. A driver begins a long-distance trip at 6:00 PM, planning to drive until the 14-hour limit expires at approximately 10:00 PM. The route includes rural highways with minimal lighting. At 9:30 PM, the driver notices significant glare sensitivity from oncoming headlights, feels difficulty maintaining lane position, and experiences occasional “drifting” thoughts. The driver’s last meal was at noon and last rest break was at 3:00 PM. What factors are contributing to the driver’s deteriorating performance, and what comprehensive action should be taken?

9. A driver is descending a steep grade with a loaded trailer. The driver notices the trailer pushing the tractor slightly during braking. What brake imbalance issue is occurring, and what should the driver do?

10. What is the maximum number of hours a property-carrying driver may drive after taking 10 consecutive hours off duty?

11. A driver is descending a 6% grade in a fully loaded tractor-semitrailer. The driver notices the brake pressure gauge dropping and feels the brakes becoming less responsive. What is the most appropriate immediate action?

12. A driver is traveling through dense fog on an interstate highway at night. Visibility is reduced to approximately 200 feet. The driver notes other vehicles using high beam headlights which create additional glare. What is the correct headlight and speed management technique for this fog condition?

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

14. When preparing to uncouple a tractor from a trailer, what is the correct sequence for controlling the trailer brakes through the trailer air supply valve?

15. When applying the brakes during normal driving, what should you observe on the air pressure gauges regarding pressure decrease?

16. When conducting an air brake leak test during the pre-trip inspection, what is the maximum acceptable air pressure loss per minute for a combination vehicle?

17. What is liquid surge in a tank vehicle, and when is its effect on vehicle handling MOST dangerous?

18. At approximately what air pressure level should the low-pressure warning device activate in a CMV equipped with air brakes?

19. A driver has loaded a tractor-semitrailer and discovers that the drive axle is overweight at 35,000 lbs, exceeding the 34,000 lbs tandem limit. The trailer tandems are underweight. Which action should the driver take to correct this weight distribution problem?

20. Why must drivers manually drain air tanks regularly, even on vehicles equipped with automatic drain valves?

21. A driver performs a Class A tractor-semitrailer pre-trip inspection in the following sequence: (1) Checks trailer brakes and lights, (2) Performs engine compartment inspection with engine off, (3) Starts engine and performs cab check, (4) Checks fifth wheel coupling, (5) Performs walk-around exterior inspection. What errors did this driver make in the inspection sequence?

22. A CDL applicant is preparing for the basic vehicle control skills test and practices offset backing (left) repeatedly. During practice, the applicant notices a consistent pattern: the trailer drifts left during backing, requiring multiple corrections to stay aligned with the target box. Which analysis correctly identifies the likely cause and appropriate practice focus for this pattern?

23. When operating a commercial motor vehicle with a manual transmission, what technique is used to shift gears smoothly without damaging the transmission or causing vehicle instability?

24. All of the following are driver responsibilities during a roadside inspection, EXCEPT:

25. When checking spare electrical fuses during the cab inspection, what is the regulatory requirement for the quantity of spare fuses a CMV must carry?

26. A driver arrives at a loading dock with a 53-foot trailer. The dock space is narrow with limited clearance (approximately 8 feet on each side). The driver must choose between three backing approaches: (1) direct approach from straight-on position requiring 180-degree trailer pivot, (2) angled approach requiring 90-degree alley dock maneuver, or (3) driving past the dock and backing from the opposite direction (sight-side backing from left). Which analysis correctly evaluates these options for safety and efficiency?

27. Under 49 CFR 395.3(a)(1), what is the maximum number of hours a property-carrying driver may drive after coming on duty following 10 consecutive hours off duty?

28. A commercial driver takes a prescription medication for seasonal allergies that lists “may cause drowsiness” as a side effect. The driver feels alert and has taken the medication for years without issues. During a level I inspection, the medication is found in the cab. Analyzing the regulatory implications, which statement is most accurate?

29. What is the correct sequence of actions for executing a right turn with a tractor-semitrailer while managing off-tracking and maintaining safe clearance?

30. What is the primary purpose of the clutch brake in a commercial motor vehicle with a manual transmission?

31. A driver approaches a weigh station with a 53-foot tractor-semitrailer. The driver knows the cargo was loaded with the majority of weight concentrated toward the front of the trailer. Which weight distribution outcome is most likely to occur when the vehicle is weighed?

32. A driver is operating a CMV on a wet highway when the vehicle begins to skid. The rear wheels have locked and the trailer is swinging toward the right side of the tractor (trailer jackknife situation). The driver needs to recover control. Which analysis correctly describes the proper recovery sequence and why each step is necessary?

33. A driver performs a pre-trip inspection and finds: steering wheel play of 2.5 inches, front tire tread depth of 3/32 inch, and rear drive tire tread depth of 1/32 inch. The driver calculates that only one issue needs immediate attention because the other two are borderline. Which analysis correctly identifies all violations present?

34. A driver is operating a CMV on a highway at 55 mph and observes a slower vehicle ahead moving at 40 mph in the same lane. The CMV is 60 feet long. The driver analyzes whether to maintain current speed or reduce speed to create a safe following distance. What is the minimum safe following distance the driver should maintain, and what action should be taken?

35. A driver is operating a combination vehicle equipped with ABS on a wet, slippery road. The driver applies the brakes hard to avoid a collision and feels the brake pedal pulsating underfoot. What should the driver do?

36. During the cab check portion of a pre-trip inspection, the driver must verify that all required emergency equipment is present in the commercial motor vehicle. Which combination of emergency equipment items is required for all CMVs operating on public highways?

37. A driver operating a Class A combination vehicle on a wet two-lane road encounters an obstacle in the lane ahead. The driver brakes firmly and steers right to avoid the obstacle. The tractor brakes lock, the trailer begins pushing the tractor sideways, and a jackknife develops with the trailer swinging toward the left lane. What sequence of driver actions and vehicle dynamics created this jackknife, and how should the driver respond?

38. A driver is operating a doubles combination (tractor + 28-foot first trailer + converter dolly + 28-foot second trailer) on a highway curve. The driver observes in the mirrors that the second trailer appears to be tracking dangerously close to the inside guardrail, closer than expected based on the tractor’s path. What factors could contribute to this excessive off-tracking, and what should the driver do?

39. A driver is traveling at 55 MPH on a dry highway when an obstacle appears ahead. The driver immediately presses the brake pedal. How much distance does the vehicle travel before the brakes actually begin engaging due to air brake lag?

40. How frequently should a commercial driver check mirrors while driving on the highway?

41. What is the purpose of performing a tug test after coupling a tractor to a semitrailer?

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

43. A CDL driver is operating a tractor-semitrailer on a curved highway ramp during rain when the trailer begins to swing outward, creating a jackknife situation. Which immediate action should the driver take?

44. A CDL driver begins a trip at 6:00 AM after sleeping only 4 hours the previous night. By 2:00 PM (8 hours of driving), the driver notices difficulty focusing, slower reaction to traffic changes, and a brief episode of drifting within the lane before corrective steering. Which analysis correctly identifies the condition and required action?

45. Under 49 CFR Part 383, what is the minimum disqualification period for a first-time major offense committed while operating a commercial motor vehicle, such as driving with a BAC of 0.04% or higher or leaving the scene of an accident?

46. What is the correct procedure for selecting the appropriate gear before descending a steep mountain grade in a commercial motor vehicle?

47. A driver conducts a pre-trip inspection on a Class A tractor-semitrailer and identifies the following conditions: (1) Both steer tires have tread depth of 5/32 inch, (2) Left drive axle dual tires have diameter difference of 1/2 inch, (3) Slack adjuster push rod travel on rear trailer axle measured at 1 inch exactly, (4) Fire extinguisher gauge shows “charged” but extinguisher was manufactured 3 years ago, (5) One reflective triangle case is cracked but triangle is intact and usable, (6) Air compressor builds from 85 PSI to 100 PSI in 55 seconds at engine idle. Based on CVSA Out-of-Service Criteria and FMCSA regulations, which determination is correct?

48. A driver operates a 2015 model year tractor hauling freight within a 120 air-mile radius of the driver’s work reporting location. The driver returns to the work reporting location within 12 hours and is released from duty. The carrier uses ELDs for all drivers. Which statement is correct regarding this driver’s recording requirements?

49. When inspecting dual tires (twin tires mounted side-by-side on the same axle) during a pre-trip inspection, what is the maximum acceptable difference in diameter between the two tires in a dual assembly?

50. You are backing a tractor-semitrailer into a narrow alley dock space. You cannot clearly see the dock from the cab due to limited mirror visibility. What should you do before continuing to back?