1. A driver is preparing to make a left turn at a four-way intersection in a 65-foot tractor-semitrailer. The intersection has oncoming traffic and the driver must wait for a gap before turning. The driver positions the tractor in the left portion of the lane. When a sufficient gap appears, what is the correct technique for executing this left turn while managing off-tracking?

2. A driver must back a double-trailer combination (twin 28-foot trailers) into a loading dock. Compared to backing a single 53-foot trailer, what additional challenges and precautions should the driver anticipate for the double-trailer backing maneuver?

3. A driver operating a 5-axle tractor-semitrailer combination measures the following axle spacing: steer axle to drive axle = 12 feet, drive axle to first trailer axle = 4 feet (tandem pair spaced at this bridge distance), trailer tandem axle spacing between the two axles = 4 feet. The total gross weight is 79,500 lbs distributed as: steer axle 11,500 lbs, drive axle 17,000 lbs, trailer tandem 34,000 lbs (each axle at 17,000 lbs). Analyze whether this configuration complies with the federal bridge formula under 49 CFR Section 658.17, and identify any violations.

4. A CDL driver is making a right turn at a tight urban intersection with a 53-foot trailer. There are parked cars on the right and a pedestrian waiting at the corner. The driver’s tractor is positioned in the right lane. What turning technique should the driver apply?

5. What is the maximum acceptable steering wheel play during the cab check portion of a pre-trip inspection for a commercial motor vehicle?

6. When must a property-carrying driver take a 30-minute break under 49 CFR 395.3(a)(3)(ii)?

7. A driver operating a 60-foot combination vehicle at 55 mph on an interstate begins experiencing heavy eyelids, frequent yawning, and realizes they cannot remember passing the last two mile markers. The driver has been on duty for 9 hours and has 150 miles remaining to destination. What is the correct immediate response?

8. During a CDL skills test alley dock exercise, an evaluator observes the applicant performing the following actions during the backing maneuver: (1) Before beginning to back, the applicant exits the vehicle and walks to the rear to inspect the backing path—this takes 15 seconds. (2) While backing, the applicant looks forward toward the front of the vehicle for approximately 3 seconds while the vehicle continues moving backward. (3) The applicant stops backing, exits the vehicle again to check position, then continues backing after re-entering. (4) At one point during backing, the applicant turns head to look at the left mirror while continuing to back. Analyze which actions are scored as errors and calculate the total points for these observations.

9. During the CDL skills test, an applicant is performing straight-line backing. The examiner observes that the applicant’s vehicle has crossed the boundary line on the right side. What is the correct action for the applicant to take?

10. What are the three components that make up total stopping distance for a commercial motor vehicle?

11. A commercial driver is preparing to back a tractor-trailer into a loading dock. The driver notices pedestrians walking behind the trailer on the left side. The driver’s mirrors show a clear path on the right. What is the correct procedure?

12. What three components make up total stopping distance for a commercial motor vehicle?

13. A driver observes the following during an extended pre-trip air brake test: with the engine running, the compressor builds pressure to exactly 125 PSI and stops; the driver applies brakes several times, dropping pressure to 95 PSI; the compressor resumes and builds to 125 PSI; the driver continues applying brakes until pressure drops to 55 PSI, at which point the low-pressure warning buzzer activates. Which component or setting should the driver question based on these observations?

14. A new driver with a Tank Vehicle (N) endorsement is preparing to load a chemical tanker for the first time. The shipper instructs the driver to fill the tank to 100% capacity for efficiency. What is the correct response and why?

15. When backing a tractor-semitrailer, what is the correct mirror usage pattern to maintain awareness of the trailer’s position throughout the maneuver?

16. A driver operating a 65-foot combination vehicle at 55 mph calculates following distance using the 1-second-per-10-feet rule but forgets to add the extra second for speeds over 40 mph. What is the consequence of this error, and how does it affect safety?

17. A driver operating a loaded tractor-semitrailer encounters a sudden rainstorm while traveling on an interstate at 60 mph. The pavement becomes wet and the driver notices the steering feeling lighter than normal. What condition is developing, and what immediate actions should the driver take?

18. Which statement accurately compares the off-tracking characteristics of different commercial vehicle configurations and their impact on turning maneuvers?

19. A driver in a 13-foot 6-inch tall tractor-semitrailer approaches a railroad crossing with a posted clearance sign showing 13 feet. The crossing has a slight grade crossing the tracks. Which analysis is correct regarding clearance safety?

20. A CDL driver is operating a tractor-semitrailer on a two-lane rural road and notices a vehicle following too closely from behind (tailgating). The driver needs to maintain safe operation. What should the driver do to address this situation?

21. A driver transporting gasoline in a 9,500-gallon tank trailer receives loading documentation from the shipper showing: product volume 8,550 gallons, tank capacity 9,500 gallons, loaded percentage 90%, outage (ullage) 950 gallons (10%). The ambient temperature at loading was 65°F, and the route destination has forecast temperatures of 95°F. Analyze whether this outage/ullage meets federal requirements and safety considerations for gasoline transport, and identify what precautions the driver must take.

22. A driver completes a post-trip inspection and finds no defects on the vehicle. The dispatcher instructs the driver to skip writing the DVIR since there are no defects to report. What should the driver do regarding DVIR documentation?

23. What is the maximum driving time limit for passenger-carrying drivers under 49 CFR 395.5(a)(1)?

24. After coupling a tractor to a semitrailer, a driver visually checks the fifth wheel and sees the locking lever is in the locked position with the safety latch engaged. What additional verification should the driver perform before proceeding?

25. What is the minimum horizontal field of vision requirement for commercial driver medical qualification?

26. Compared to a fully loaded commercial motor vehicle at the same speed, how does stopping distance differ for an empty CMV?

27. A driver is operating a Class A tractor-semitrailer equipped with a dual air brake system. While driving on the highway, the driver notices that the primary air system gauge shows 45 PSI and dropping, while the secondary system gauge shows 110 PSI. Which braking systems remain functional in this situation?

28. A driver is performing an air brake system check on a combination vehicle. With the engine at fast idle, the air pressure gauge shows 85 PSI. After 50 seconds of watching, the pressure has only reached 92 PSI. The driver needs to determine whether this meets FMCSA standards. What conclusion should the driver reach?

29. According to FMCSA regulations, a commercial driver must not consume alcohol within how many hours before operating a CMV?

30. According to FMCSA standards, within how many seconds should the air compressor build air pressure from 85 PSI to 100 PSI when the engine is at fast idle (approximately 1200-1500 RPM)?

31. How much time does air brake lag typically add between pressing the brake pedal and the brakes beginning to engage?

32. What is the function of the trailer air supply valve, commonly identified as the red 8-shaped button in the tractor cab?

33. A driver is approaching a sharp curve on a rural highway while operating a loaded Class A combination vehicle. The posted speed limit is 45 mph, but the curve has a recommended speed sign of 25 mph. What should the driver do?

34. A CDL applicant performs the offset backing (right) exercise. During the maneuver, the applicant realizes the trailer is drifting toward the left boundary and decides to perform a pull-up to correct. Which analysis best explains the trade-off between continuing the maneuver versus performing a pull-up?

35. During a pre-trip inspection, the driver checks the U-bolts on the suspension system. Which U-bolt condition would require immediate correction before the vehicle can be operated?

36. A driver is performing an air brake system leak test on a Class A tractor-semitrailer. With the parking brake applied and the engine turned off, the driver observes the air pressure gauges for one minute. The primary tank drops from 100 PSI to 97 PSI. The secondary tank drops from 100 PSI to 96 PSI. Based on these readings, which determination is correct?

37. During a pre-trip inspection of a Class A tractor-semitrailer, a driver examines the fifth wheel mounting and observes the following: the fifth wheel is securely bolted to the tractor frame with no missing fasteners, the fifth wheel plate has visible grease but shows a worn, dry streak along the center where the trailer kingpin slides, the locking jaw mechanism moves freely but has visible wear marks on the jaw surface, and the release lever operates correctly with the safety latch engaging. Which condition requires immediate correction before driving, and why?

38. A driver is operating a CMV with air brakes when the low-pressure warning activates at 55 PSI. Which immediate action should the driver take?

39. You are driving a 60-foot combination vehicle (tractor-semitrailer) at 55 MPH on a dry interstate highway in clear conditions. A passenger car ahead of you is maintaining steady speed. What is the minimum following distance you should maintain behind this vehicle?

40. Which of the following offenses results in lifetime disqualification for a first conviction?

41. When following another vehicle at night, at what distance should you dim your high beams?

42. When inspecting landing gear during pre-trip, what indicates that the landing gear is properly secured for travel?

43. A driver completes the air brake pre-trip inspection on a Class B straight truck. During the parking brake test, the driver applies the parking brake control and gently tugs the vehicle forward in low gear. The vehicle moves forward approximately 6 inches before the parking brake engages and holds. What should the driver conclude about this test result?

44. A driver is inspecting the brake hoses and lines during the walk-around portion of a pre-trip inspection on a Class B straight truck with air brakes. The driver observes that a brake hose on the right rear axle shows the following characteristics: the hose has visible cracks on the outer covering, the hose is flexible and not brittle when pressed, and there are no visible air leaks when the brakes are applied. What should the driver determine about this brake hose condition?

45. A driver is performing the engine compartment portion of a pre-trip inspection on a Class A tractor. Arrange the following engine compartment inspection items in the correct sequence as presented in the CDL Manual: (1) Check coolant level, (2) Check power steering fluid level, (3) Check engine oil level, (4) Check windshield washer fluid level, (5) Inspect belts and hoses for condition.

46. A flatbed driver has loaded a single piece of steel fabrication measuring 7 feet in length and weighing 3,000 lbs. The cargo rests on wooden blocking and has no built-in attachment points. Under 49 CFR Part 393 Subpart I, determine the minimum number of tiedowns required for this article and explain the reasoning.

47. What is the normal operating pressure range for most air brake systems, as controlled by the compressor governor?

48. A driver experiences a front-wheel skid while braking on a slippery road surface. What is the correct recovery technique?

49. During the trailer inspection portion of a pre-trip inspection for a Class A tractor-semitrailer, the driver checks the landing gear (support legs) under the front of the trailer. What landing gear condition indicates a defect that must be reported?

50. When railroad crossing warning devices malfunction (such as gates down with lights not flashing), which action correctly analyzes the situation and maintains safety?