1. A CDL driver is operating a 60-foot combination vehicle at 55 mph on a wet highway during steady rain. The vehicle is equipped with cruise control. Which action must the driver take?

2. A driver operating a double-trailer combination (twin 28-foot trailers) is preparing to make a left turn from a four-lane highway onto a two-lane road. The intersection has moderate traffic with vehicles waiting to turn right from the opposite direction. Analyze the factors affecting this turn and determine the safest approach considering the increased off-tracking characteristics of doubles.

3. A CDL driver is operating a tractor-semitrailer on a four-lane highway at 60 mph. The driver needs to check mirrors while maintaining forward awareness. Which visual search pattern should this driver follow?

4. When inspecting the suspension system during a pre-trip inspection, which condition of the spring hangers would indicate an out-of-service condition requiring immediate correction?

5. A driver is performing a pre-trip inspection and discovers that two of the three required reflective triangles are present in the cab, but one triangle is missing. Later during the trip, the vehicle experiences a mechanical breakdown on a divided highway (four lanes, two directions). Which statement correctly describes the regulatory compliance and safety implications?

6. A property-carrying driver finishes their shift at 7:00 PM on Friday with 68 on-duty hours accumulated over the past 7 days. They take 34 consecutive hours off duty, returning to work at 5:00 AM on Sunday. Under the 34-hour restart provision, what is their on-duty hour calculation for the next 7-day period?

7. A truck driver’s vehicle has a single axle currently weighing 22,500 lbs while traveling on an interstate highway. What action should the driver take to comply with federal weight regulations?

8. A driver is operating a combination vehicle on a downhill grade when the low-pressure warning activates at 60 PSI. The driver notices pressure continuing to drop to 45 PSI despite taking foot off the brake. What will happen automatically at approximately 20-45 PSI, and what should the driver have already done?

9. What is off-tracking in a combination vehicle?

10. During a pre-trip inspection, a driver pumps the brake pedal with the engine off to reduce air pressure. The air pressure drops from 120 PSI to 95 PSI, but the compressor does not start pumping. What should the driver conclude from this observation?

11. Which statement accurately defines the relationship between parking brakes and emergency brakes in an air brake system?

12. What does “GOAL” stand for in backing safety procedures and when should the driver apply this technique?

13. Which of the following CMV operations is EXEMPT from the ELD mandate per 49 CFR Part 395 Subpart B?

14. A driver is preparing to make a right turn from a two-lane road into a narrow side street in a downtown area. The street has pedestrians on the sidewalk and parked vehicles along both sides. The driver’s combination vehicle is 65 feet long. How should the driver position and execute this turn to avoid off-tracking into the sidewalk or parked vehicles?

15. During the cab check portion of a pre-trip inspection, which of the following is NOT a required verification for emergency equipment compliance?

16. During a pre-trip inspection, a driver identifies a cracked windshield in the driver’s line of sight. The driver documents the defect on the Driver Vehicle Inspection Report (DVIR) but decides to drive anyway since the vehicle started fine. Which requirement under 49 CFR 396.11 has been violated?

17. A driver operating a straight truck at 45 mph at night encounters heavy rain that reduces visibility to approximately 300 feet. The driver’s windshield wipers are operating at high speed. Suddenly, the vehicle begins to hydroplane—the front wheels lose contact with the road surface and steering becomes light and unresponsive. What is the correct emergency response?

18. You are driving a tractor-semitrailer and approaching a railroad-highway grade crossing with multiple tracks. The crossing has no gates but has flashing lights and crossbuck signs. You observe a train passing on the nearest track, and the lights have stopped flashing. What is the correct procedure for crossing these multiple tracks safely?

19. What is the effect of having too little weight on the front axle of a commercial motor vehicle?

20. A CDL driver is descending a 5% grade in a 40,000-pound straight truck. The driver has been using steady brake pressure for the last mile and notices the brake pedal feels spongy and requires more pressure to achieve the same braking effect. What is happening and what should the driver do?

21. A CDL driver has been driving for 8 hours and begins experiencing heavy eyelids, frequent yawning, difficulty remembering the last few miles driven, and a feeling of restlessness. The driver’s 11-hour driving limit has 3 hours remaining. What should the driver do in response to these fatigue symptoms?

22. While backing a tractor-semitrailer, the driver needs the trailer to move toward the left (driver’s side). How should the driver turn the steering wheel?

23. What is the purpose of the tug test after coupling a tractor to a trailer?

24. A driver operating a tractor-semitrailer gets stuck on railroad tracks. There is no train visible or audible, but the crossing signals begin flashing. What should the driver do immediately?

25. A driver operating a Class A combination vehicle approaches a weigh station and receives an green light indicating bypass. Ten miles later, a state trooper activates lights behind the vehicle and requests a roadside inspection. The driver had not performed a detailed pre-trip inspection that morning due to time pressure. During the inspection, the trooper finds three defective lights and slack adjusters showing 1.25 inches of push rod travel. Which analysis best describes the regulatory failures in this situation?

26. When driving a CMV at night, within what distance should the driver dim high beam headlights when approaching an oncoming vehicle?

27. What action must a driver take after discovering a defect during a pre-trip inspection that would place the vehicle out of service?

28. What is the difference between baffled tanks and smooth bore (unbaffled) tanks in terms of liquid surge control?

29. During your pre-trip inspection, you perform the static air brake leak test with the parking brake applied and engine off. You observe that air pressure drops from 100 PSI to 93 PSI over one minute. Based on FMCSA standards for a combination vehicle, what does this indicate and what action should you take?

30. A CDL driver is descending a 6% grade mountain road at night in a 65-foot combination vehicle. The driver observes brake temperature warning indicators rising and notices headlights of an oncoming vehicle approximately 400 feet ahead on a winding section. The driver’s high beams are currently on. The driver must analyze multiple factors: brake management, visibility, and safe speed. Which combined response is correct?

31. A driver needs to back a 53-foot trailer into a narrow alley for a delivery. The alley has a slight uphill grade and a 90-degree turn at the entrance. There is no spotter available, and visibility on the passenger side is blocked by a building. The driver must complete the maneuver alone. Analyze the safest approach.

32. What is the CORRECT sequence of actions when preparing to perform a parallel parking maneuver on the driver’s side (left side) during the CDL skills test?

33. You are driving a 50-foot tractor-semitrailer loaded with 40,000 pounds of cargo on a highway posted at 65 MPH. The road surface is dry, traffic is moderate, and weather conditions are clear. However, the cargo is loaded high in the trailer, creating a center of gravity significantly above normal. What is the appropriate speed management decision given this cargo configuration?

34. Which of the following is NOT a required precaution for night driving in a commercial motor vehicle?

35. A driver is inspecting a trailer breakaway valve during a pre-trip inspection. The valve appears intact with no visible damage. However, the driver observes that the emergency air line (red) from the tractor is connected but the valve’s pressure gauge shows only 45 PSI instead of the expected system pressure of approximately 120 PSI. The trailer spring brakes are currently released. Which analysis correctly identifies the most likely cause and appropriate response?

36. Which combination of factors creates the HIGHEST risk for rollover in a combination vehicle?

37. A CDL driver is approaching a four-way intersection and intends to make a right turn with a 60-foot combination vehicle. The driver checks mirrors and sees a passenger vehicle in the right lane near the trailer’s rear. What communication and positioning actions should the driver take before initiating the turn?

38. Under 49 CFR 395.8, what is the minimum age requirement for a driver to be required to use an Electronic Logging Device (ELD)?

39. A driver is preparing to uncouple a tractor-semitrailer on a slight incline. The parking brakes are applied. What additional precaution should the driver take BEFORE lowering the landing gear?

40. A driver needs to complete a full pre-trip inspection for a Class A tractor-semitrailer. Arrange the following inspection areas in the correct sequence: (1) Engine compartment with engine off, (2) Trailer walk-around, (3) Cab check with engine running, (4) Vehicle exterior walk-around, (5) Coupling system inspection including fifth wheel and air lines.

41. A driver needs to position a tractor-semitrailer for backing into a dock located at the end of a narrow alley. The approach requires a 90-degree turn from the street into the alley before backing. Which approach sequence is correct?

42. A commercial driver begins a trip at 6:00 AM after sleeping only 4 hours the previous night. By 2:00 PM, the driver has been on duty for 8 hours and has driven for 5 hours. The driver begins experiencing warning signs of fatigue: heavy eyelids, frequent yawning, and difficulty maintaining steady lane position. The driver’s current location is 75 miles from the delivery destination. What is the correct response to this fatigue situation under FMCSA Hours of Service regulations?

43. A commercial driver is stopped at a weigh station for a routine inspection. The officer observes signs that the driver may have consumed alcohol and requests a breath test. The driver refuses to submit to the alcohol test. Under FMCSA regulations and 49 CFR Part 383, what disqualification penalty applies for refusing an alcohol test while operating a CMV?

44. How do parking brakes (spring brakes) apply when a driver parks a commercial motor vehicle?

45. A driver is preparing to make a left turn from a four-lane highway onto a two-lane road using a 65-foot tractor-semitrailer. There is moderate traffic with an oncoming pickup truck waiting to turn right onto the same two-lane road. The driver observes that the oncoming pickup is positioned close to the centerline. Analyze the factors affecting this turn and determine what additional precautions are needed due to the oncoming vehicle’s position.

46. During the walk-around inspection of a CMV, what wheel or rim condition would require immediate correction before the vehicle can be safely operated?

47. What is the federal maximum weight limit for a single axle on interstate highways under normal conditions?

48. What is required for an Electronic Logging Device (ELD) to be compliant with FMCSA regulations?

49. A driver is coupling a tractor to a trailer and needs to connect the air lines. The driver sees a blue glad hand on one air line and a red glad hand on the other. The tractor has corresponding blue and red connectors. The driver connects the blue tractor glad hand to the red trailer glad hand and the red tractor glad hand to the blue trailer glad hand. What will happen when the driver tests the trailer brakes after this connection?

50. A driver is preparing to descend a moderate grade with a loaded trailer. When is it appropriate to use the trailer hand valve (trolley valve) during this descent?