1. A driver is operating a loaded tractor-semitrailer on a four-lane highway at 60 mph. The driver checks mirrors every 5–8 seconds and looks 12–15 seconds ahead. A vehicle in the right lane moves into the driver’s left-side no-zone without signaling. The driver’s left-side mirror shows empty space moments before. Which analysis explains this situation and what should the driver do?

2. What is the primary difference in driver responsibility between an active railroad crossing (with lights and gates) and a passive crossing (signs only, no signals)?

3. A CDL candidate is performing the parallel parking maneuver on the skills test. After the initial setup, the candidate begins backing. The examiner observes the trailer approaching the rear boundary cone too quickly. What should the candidate do, and how will this affect scoring if executed correctly?

4. You are driving a 65-foot tractor-semitrailer and need to make a right turn at an intersection. The curb is 10 feet from the edge of the right lane. What is the correct procedure to prevent the trailer from off-tracking into the curb or sidewalk?

5. A delivery driver completes a delivery route and parks the vehicle at the company terminal at 3:00 PM. The driver leaves for the day without performing any inspection. The next driver arrives at 7:00 AM the following day and discovers a flat tire during pre-trip inspection. Who is responsible for the DVIR entry regarding the tire condition?

6. A driver operating a 60-foot combination vehicle is traveling at 55 mph on a dry interstate highway. Using the standard following distance formula for commercial motor vehicles, what minimum following distance should the driver maintain behind the vehicle ahead?

7. A driver is conducting a pre-trip inspection on a tractor-semitrailer combination. During the trailer walk-around, the driver notices that one of the trailer’s dual tires on the rear axle has a visible bulge on the sidewall. The driver also notes that the matching dual tire appears to have lower tread depth than the bulging tire. What action should the driver take regarding this trailer tire condition?

8. While driving on a slippery road, a driver begins to feel the trailer starting to jackknife — the trailer is swinging to the right while the tractor continues straight. The driver had been using the trailer hand valve for braking on the downgrade. What caused this situation and what is the correct recovery action?

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

10. Under FMCSA regulations, a commercial driver with a blood alcohol concentration (BAC) of 0.04% or higher while operating a CMV faces what consequence for a first offense?

11. During the walk-around inspection of a Class B straight truck with air brakes, a driver inspects the brake drums on the rear axle through the wheel openings. The driver observes that one brake drum has visible cracks extending across the drum surface. The driver also notes that the brake linings on that wheel appear to be within acceptable limits with adequate thickness. What action should the driver take based on this inspection finding?

12. A commercial driver is operating a combination vehicle with a 53-foot trailer on a two-lane road. The driver needs to make a right turn at an intersection with limited space. A passenger vehicle has stopped in the right lane next to the intersection, partially blocking the turning radius. Analyzing the situation, what is the safest approach?

13. A driver is transporting a load that was loaded with weight concentrated toward the rear of the trailer. At a weigh station, the driver receives an overweight violation for the trailer tandem axles at 36,500 lbs, while the drive axle weighs 28,000 lbs. The driver analyzes the situation to determine the correct adjustment. Which analysis and action is correct?

14. A driver is transporting liquid fertilizer in a smooth bore tanker. The tank is filled to approximately 60% capacity. The driver approaches a steep downhill section followed by a sharp curve. Which combination of driving techniques BEST manages both the downgrade and the liquid surge risks?

15. Which statement correctly describes the 60-hour/7-day and 70-hour/8-day limits for passenger-carrying drivers?

16. A driver is performing an air brake system check during a pre-trip inspection. The driver pumps the brake pedal with the engine off until the air pressure drops to 85 PSI, then starts the engine and idles. Within 45 seconds, the pressure rises from 85 PSI to 100 PSI and the compressor continues building. What does this observation indicate about the governor and compressor?

17. During the CDL skills test basic control exercises, what is the maximum number of pull-ups allowed before points are deducted?

18. When uncoupling a tractor-semitrailer, what is the correct order for disconnecting air lines and releasing the fifth wheel after landing gear is lowered?

19. A driver is descending a 6% grade in a Class A combination vehicle. The driver notices brake temperature increasing and slight fade beginning. The driver was in fifth gear when starting the descent and has been using steady brake pressure. What errors in preparation and technique contributed to this situation?

20. A driver is operating a combination vehicle with a 53-foot trailer. What effect does off-tracking have on this vehicle during turns, and how should the driver compensate?

21. A driver completes a pre-trip inspection and documents the following slack adjuster measurements: push rod travel of 1-1/4 inches on the front axle brake chambers, 1 inch on the drive axle, and 3/4 inch on the trailer axle. All brake chambers are Type 30 (standard size). Which analysis correctly describes the brake adjustment status?

22. You are driving a 65-foot combination vehicle through an urban area with multiple intersections. A sedan is positioned in your right-side no-zone as you approach a right turn. Your mirrors show traffic behind you but cannot show the sedan’s exact position. You need to make the turn within 200 feet. Analyze the situation and determine the safest approach.

23. A driver is attempting to back a tractor-trailer into a narrow alley dock space between two parked trailers. The driver has made two attempts but is still misaligned. The rear of the trailer is too far to the right of the dock opening. The driver has pulled forward to try again. Analyze the situation and determine the best correction.

24. During the CDL skills test straight-line backing exercise, what action is considered an “encroachment” that results in point deduction?

25. A driver approaches a weigh station with the following axle weights: steer axle 12,000 lbs, drive axle 19,000 lbs, and trailer tandem axles weighing 35,000 lbs combined. The total gross weight is 66,000 lbs. Which statement accurately describes this vehicle’s weight compliance status?

26. A driver begins to notice the trailer drifting toward the shoulder on a curve. What is the correct response to prevent a potential rollover?

27. During a rest stop, a driver walks around the vehicle to perform a tire inspection. The driver notices that one tire on the rear trailer axle shows a bulge on the sidewall and feels significantly hotter than the other tires when touched. What action should the driver take?

28. A driver with a Class A CDL is placed out of service during a roadside inspection for a brake violation. The driver ignores the out-of-service order and continues driving the CMV. What is the minimum disqualification period for this first conviction?

29. A bridge crossing has a posted weight limit of 40 tons. The driver’s truck has a gross weight of 75,000 pounds. Should the driver cross the bridge?

30. 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?

31. You are driving a 60-foot tractor-semitrailer at 55 mph on a two-lane highway. A passenger car is traveling behind you in the right-side blind spot. How should you communicate your intention to make a right turn at an upcoming intersection?

32. A driver notices the low-pressure warning signal activates at 55 PSI while driving. What is the correct immediate action?

33. A driver is inspecting a CMV’s foundation brakes and notices a wedge-type brake system rather than the common S-cam type. How does the wedge brake mechanism apply braking force differently from an S-cam brake?

34. A driver is negotiating a right turn in a city intersection with a 53-foot trailer. The driver observes that the trailer’s rear wheels are tracking closer to the curb than the tractor’s front wheels. This phenomenon is called:

35. A driver is operating a loaded Class B straight truck (35 feet long) on a foggy interstate at 45 mph. Visibility is approximately 300 feet. The driver is maintaining a 5-second following distance behind a passenger vehicle. Traffic ahead begins to slow unexpectedly, and the driver notices brake lights from multiple vehicles ahead. Which combination of factors makes this situation most dangerous, and what should the driver do?

36. A commercial driver is stopped at a weigh station for a routine inspection. During the inspection, the law enforcement officer conducts a breath alcohol test. What Blood Alcohol Concentration (BAC) level would result in immediate CDL disqualification for a commercial driver operating a commercial motor vehicle?

37. A property-carrying driver starts their shift at 6:00 AM after 10 consecutive hours off duty. They drive from 6:00 AM to 10:00 AM, take a 30-minute break, then drive from 10:30 AM to 2:30 PM. How many more driving hours do they have available?

38. During a pre-trip inspection, a driver notices that when the parking brake is released, air pressure drops from 110 PSI to 105 PSI, and then stabilizes. The vehicle has dual air systems. Is this condition acceptable, and why?

39. A driver is operating a loaded tractor-semitrailer on a interstate highway at 65 MPH. During the trip, the driver notices an unusual vibration coming from the left front wheel area that intensifies when braking. The vibration is not present during acceleration or steady cruising. The driver also notices the steering wheel has a slight shimmy during braking events. What should the driver do?

40. During the cab check portion of a pre-trip inspection, what emergency equipment must be present and verified as functional in a commercial motor vehicle?

41. A driver has just completed coupling a tractor to a semitrailer and wants to verify that the fifth wheel is properly locked. The driver performs a tug test by putting the tractor in low gear and pulling gently forward against the trailer brakes. The trailer does not move. The driver then visually inspects the fifth wheel and sees the locking lever is in the locked position with the safety latch engaged. What additional verification step should the driver perform before concluding the coupling inspection?

42. A CDL driver is operating a loaded tractor-semitrailer at 55 mph on a dry highway when the right front steer tire suddenly blows out. The vehicle begins pulling to the right. The driver notices a passenger vehicle following closely about 3 seconds behind. What is the correct sequence of actions the driver should take?

43. A driver submits a DVIR documenting a defective brake light. The carrier’s mechanic repairs the brake light the same day. The driver who found the defect is dispatched on a different route the next morning. A different driver is assigned to the repaired vehicle. What federal requirement must the carrier complete before the repaired vehicle can be dispatched to the second driver?

44. Why is backing toward the driver’s left side (sight-side backing) preferred over backing toward the passenger’s right side (blind-side backing)?

45. During an alley dock maneuver, a driver has already used two pull-ups and has one remaining before incurring automatic failure. The trailer is close to the right boundary, and the driver is uncertain if they can complete the straight-back portion without crossing the line. Analyze the best course of action.

46. A driver completes a DVIR noting a defective left rear turn signal. The motor carrier’s maintenance director reviews the report and writes “Repaired – bulb replaced” on the DVIR. However, during the next driver’s pre-trip inspection, the turn signal still does not function. The second driver notes the defect on a new DVIR and refuses to operate the vehicle. Analysis of this situation reveals which violation?

47. A driver is operating a 60-foot combination vehicle at 55 mph on a dry highway. Using the standard following distance formula (1 second per 10 feet of vehicle length, plus 1 additional second for speeds over 40 mph), what minimum following distance in seconds should the driver maintain?

48. Why do air brake systems use dual air tanks (primary and secondary reservoirs)?

49. A property-carrying driver began their on-duty period at 4:00 AM after 10 consecutive hours off duty. They drove 4 hours (4:00 AM to 8:00 AM), then took a 30-minute off-duty break from 8:00 AM to 8:30 AM, then performed a pre-trip inspection for 30 minutes (8:30 AM to 9:00 AM), then drove 6 hours (9:00 AM to 3:00 PM), then unloaded cargo for 2 hours (3:00 PM to 5:00 PM). At 5:00 PM, can this driver legally continue driving, and why or why not?

50. You are driving a 60-foot tractor-semitrailer on a highway with uneven pavement and potholes in the right lane. The left lane has smoother pavement but has faster traffic. What is the best space management decision?