1. A driver is coupling a tractor to a trailer and has connected both air lines. What should the driver do NEXT to prepare the trailer brakes before backing under?

2. A driver has backed under a trailer and the fifth wheel has locked around the kingpin. Before raising the landing gear, what critical test must the driver perform?

3. A commercial driver visits a medical clinic for a DOT physical examination. The physician conducting the exam is not listed on the FMCSA National Registry of Certified Medical Examiners. The physician issues a Medical Examiner’s Certificate stating the driver is qualified. Which statement correctly describes the legal status of this medical certificate?

4. A truck driver approaches a right turn in a city with tight lanes. The turn requires the trailer to track close to the curb while avoiding encroaching on the adjacent lane. What is the correct sequence for this maneuver?

5. At approximately what PSI does the governor typically cut-out, signaling the air compressor to stop building pressure?

6. A driver is navigating dense fog on a two-lane rural road in a Class B straight truck. The driver cannot see the road edges clearly. Which reference should the driver use to maintain proper lane position?

7. Which component automatically protects the tractor’s air supply from trailer air line failures by closing when trailer air pressure drops suddenly?

8. What is the recommended steering method for Commercial Motor Vehicles (CMVs)?

9. A driver is operating an empty tractor-semitrailer on a dry interstate highway at 55 mph and needs to make an emergency stop. Which analysis correctly compares stopping distance performance between this empty CMV and the same vehicle fully loaded to 80,000 lbs?

10. What does GVWR stand for?

11. Which inspection must a CDL driver perform before operating a commercial motor vehicle each day?

12. You are driving a tractor-semitrailer on a mountain highway approaching a steep 6% downgrade that extends for 3 miles. The posted speed limit at the top of the grade is 55 MPH. What is the correct procedure for safely descending this grade?

13. During in-route inspection, a driver observes that the air compressor builds pressure from 85 PSI to 100 PSI. According to CDL Manual standards, this pressure build should occur within what maximum time frame when the engine is at idle?

14. Which of the following is NOT a required element of the Driver Vehicle Inspection Report (DVIR) under 49 CFR Section 396.11?

15. A driver in a Class A combination vehicle is being tailgated by a passenger vehicle on a two-lane highway. The passenger vehicle is following at approximately 2 seconds behind. What should the CMV driver do to manage this space behind safely?

16. A driver notices the ABS malfunction indicator lamp is on while driving on a dry road. What is the correct interpretation and action?

17. A driver begins a trip at 6:00 AM and completes the pre-trip inspection, finding no defects. During the trip, the driver notices the steering feels loose and responsive time has increased. What inspection action is required?

18. A CDL driver is stopped during a roadside inspection and found to have a blood alcohol concentration (BAC) of 0.06% while operating a commercial motor vehicle. The driver has no prior CDL disqualifications. Which disqualification will the driver face?

19. A driver conducts a pre-trip inspection on a Class A tractor-semitrailer and identifies the following conditions: (1) Left steer tire tread depth measured at 3/32 inch, (2) Right drive axle dual tires have diameter difference of 3/8 inch, (3) Left trailer axle slack adjuster push rod travel measured at 1.1 inches, (4) Fire extinguisher gauge shows “charged” position but expiration date is 18 months past. Based on CVSA Out-of-Service Criteria and FMCSA regulations, which analysis correctly identifies the vehicle’s operational status?

20. A driver is preparing to descend a 5% grade that extends for 3 miles. The posted speed limit at the top is 55 mph. What is the correct speed management approach for this downgrade?

21. What is the minimum number of reflective triangles required to be carried in a commercial motor vehicle for emergency use during breakdown or accident scenes?

22. When a tire blowout occurs on a commercial motor vehicle, what is the correct immediate response?

23. A driver transporting hazardous materials approaches a railroad-highway grade crossing with active flashing lights and an approaching train visible approximately 500 feet away. The crossing has multiple tracks. Which analysis of stopping position and crossing procedure is correct?

24. A driver is operating a loaded tractor-semitrailer (65 feet) on a two-lane highway at 50 mph. A passenger vehicle suddenly crosses the center line 200 feet ahead, heading directly toward the CMV. To the right is a narrow shoulder with a shallow ditch. Behind the CMV is a vehicle maintaining 4-second following distance. The driver has approximately 3 seconds to react. Which emergency response provides the best outcome?

25. A driver begins duty at 5:00 AM and drives until 1:00 PM (8 hours of driving). The driver then takes a 2-hour off-duty break from 1:00 PM to 3:00 PM. After this break, the driver continues driving from 3:00 PM to 11:00 PM. At 11:00 PM, the driver takes 8 consecutive hours in the sleeper berth. Under the sleeper berth provision, which statement accurately describes the driver’s status regarding the 14-hour on-duty window?

26. During the air brake pre-trip inspection with the engine off, what should the driver observe about the low-pressure warning device?

27. A CDL driver is operating an empty tractor-semitrailer on a wet roadway. The driver needs to stop at a signal light 200 feet ahead. Analysis shows that empty CMVs have different braking characteristics than loaded vehicles. Which approach correctly accounts for these differences?

28. A driver is descending a 5% grade in winter conditions with light snow accumulation. The combination vehicle is 72 feet long and loaded to 70,000 lbs GVW. Speed is currently 35 mph in 4th gear. The driver has been using service brakes every 30 seconds to control speed. After 2 miles of descent, brake air pressure has dropped from 120 PSI to 95 PSI, and the low-pressure warning has not activated. The driver notices a vehicle ahead maintaining 40 mph. Which analysis of the braking situation is correct?

29. What is the minimum tread depth required for steer axle tires on a commercial motor vehicle?

30. What is the required action at the end of each day’s driving regarding vehicle inspection and documentation?

31. What effect does a high center of gravity in loaded cargo have on commercial motor vehicle handling, and what driving adjustments are required to compensate?

32. A driver is backing a long combination vehicle (LCV) consisting of a tractor and two 28-foot trailers. The driver needs to back around a corner into a dock. Analyze how the second trailer will behave compared to backing a single trailer combination.

33. A tractor-semitrailer has the following axle weights after loading: front steering axle = 12,000 lbs, drive axle tandem = 35,000 lbs, trailer tandem = 31,000 lbs. The gross vehicle weight is 78,000 lbs. The driver needs to determine which adjustments are necessary for legal compliance. Which analysis is correct?

34. What is the maximum allowable steering wheel play (free play) before the steering mechanism begins to respond during a cab check inspection?

35. A driver is preparing to make a right turn at an intersection with a dedicated right-turn lane. The driver observes a vehicle stopped at the curb just past the intersection and a pedestrian crossing at the corner. How should the driver manage the turn to prevent encroachment?

36. A driver is operating a 70-foot combination vehicle on a two-lane rural highway at 55 mph during late afternoon. The driver has been on duty for 11 hours with a 30-minute break taken at hour 8. The driver experiences sudden microsleep lasting approximately 3 seconds, followed by realization that the vehicle has drifted toward the right shoulder. A car is approaching from the opposite direction. Which comprehensive analysis correctly evaluates the situation and determines appropriate action?

37. A driver is approaching a right turn at an intersection in a 65-foot tractor-semitrailer. The intersection has a dedicated right-turn lane and a concrete curb on the right side. The driver understands off-tracking will cause the trailer’s rear wheels to follow a path inside the tractor’s path. What technique should the driver use to prevent the trailer from riding up on the curb or swinging into the adjacent lane?

38. A driver is preparing to transport heavy machinery weighing 45,000 lbs. The tractor has a GVWR of 26,000 lbs and the trailer has a GVWR of 48,000 lbs. The machinery dimensions are 10 feet long. The driver calculates that GVWR (tractor + trailer) = 74,000 lbs, and cargo weight = 45,000 lbs, so total weight would be approximately 74,000 lbs (including tractor/trailer weight). However, the actual tractor weight is 18,000 lbs empty. Analyze this situation and determine the most accurate compliance concern:

39. What is the correct immediate response to a tire blowout on a commercial motor vehicle, and why is this sequence critical for vehicle control?

40. A driver is operating a CMV equipped with ABS on an icy road when a vehicle ahead suddenly stops. The driver applies the brakes firmly and feels the brake pedal pulsating. What does this pulsation indicate, and how should the driver respond?

41. You are driving a loaded tractor-semitrailer on a rural two-lane highway at 50 mph. Your visual search shows a slow-moving farm tractor entering the highway from a field approximately 1/4 mile ahead. A pickup truck is following you closely in your no-zone on the left side. You need to slow down and potentially move left to pass the tractor. Analyze the situation and determine your FIRST action.

42. A CDL driver is preparing for a long route and slept only 4 hours the previous night due to personal commitments. The driver feels “a little tired” but believes coffee and energy drinks will help stay alert. Which analysis is correct?

43. A driver is backing a tractor-semitrailer into a loading dock with a spotter positioned behind the trailer providing hand signals. The spotter signals the driver to stop, then signals to turn the trailer slightly left. The driver is unsure how to interpret the “turn left” signal in the backing context. What is the correct interpretation of the spotter’s signal and the corresponding driver action?

44. A driver uses the sleeper berth provision to split their required 10-hour off-duty period. They take 8 consecutive hours in the sleeper berth from 10:00 PM to 6:00 AM, followed by 2 consecutive hours off duty from 6:00 PM to 8:00 PM. Which statement accurately describes how this affects the 14-hour on-duty window?

45. A driver is making a left turn at a four-way intersection with two oncoming lanes. The intersection has limited space due to construction barriers on the left. The driver observes that off-tracking will cause the trailer’s rear wheels to approach the construction barriers. Analyze the situation and determine the best approach.

46. A driver is backing a tractor-semitrailer toward a dock in a confined warehouse area. The driver has performed GOAL (Get Out And Look) twice already, confirming adequate clearance on both sides. As the trailer approaches the dock (approximately 20 feet remaining), the driver considers whether to perform another GOAL or complete the backing using mirrors alone. Which factors should influence the driver’s decision to perform additional GOAL checks?

47. A driver begins a trip with a loaded trailer. What is the correct sequence for checking cargo securement during the trip?

48. At what air pressure level should the low-pressure warning device activate?

49. What is the primary cause of a trailer jackknife on a slippery surface?

50. A driver is performing the engine compartment portion of a Class A tractor-semitrailer pre-trip inspection with the engine off. Arrange the following engine compartment inspection steps in the correct sequence: (1) Check power steering fluid level, (2) Check engine oil level, (3) Inspect belts for condition and tension, (4) Check coolant level in radiator or overflow tank, (5) Inspect hoses for condition and connections, (6) Check windshield washer fluid level.