1. During the engine compartment portion of a pre-trip inspection (with engine off), what is the maximum acceptable belt deflection when pressed at the midpoint between pulleys?

2. A driver is making a right turn from a two-lane road onto a four-lane highway with a tractor-semitrailer. A pedestrian is standing near the curb at the corner, and a car is stopped in the right lane of the highway waiting to turn left. How should the driver manage this turn to account for off-tracking and surrounding traffic?

3. You are driving a tractor-semitrailer on a highway at night during winter. The temperature is 28°F, and you are approaching a bridge over a river. The road surface ahead appears wet, but you notice that other vehicles are reducing speed as they cross the bridge. What hazard should you anticipate, and what is the correct driving response?

4. You are driving a 70-foot combination vehicle on a four-lane highway at 55 MPH in moderate rain. Traffic is heavy in all lanes. A small car is in your right-side blind spot, and another vehicle is following you at approximately 3 seconds behind. You notice an upcoming underpass with a clearance sign partially obscured by graffiti. Which space management concern presents the MOST immediate safety risk?

5. At the end of a 10-hour driving day, Driver Chen prepares her DVIR and notes that two brake chambers show minor surface rust and one slack adjuster has 1 inch of push rod travel. She is unsure whether these are reportable defects. What is the correct approach to DVIR completion?

6. A driver is operating a 65-foot combination vehicle at 50 mph on a dry highway. What is the minimum safe following distance this driver should maintain?

7. A CDL driver operating a placarded hazardous materials vehicle is convicted of failing to stop at a railroad-highway grade crossing as required by 49 CFR Part 392.10. This is the driver’s second conviction for a railroad crossing violation within a 3-year period. What disqualification period will the driver face?

8. During the straight-line backing maneuver on the skills test, the driver’s trailer begins drifting toward the left boundary line. What corrective action should the driver take?

9. What is the primary purpose of the governor in an air brake system?

10. A driver is operating a tractor-trailer on an icy highway. When approaching a slowed vehicle ahead, the driver applies firm brake pressure. The ABS activates, causing a rapid pulsing sensation in the brake pedal. The driver’s instinct is to release the brakes, but what is the correct response, and why?

11. A CVSA-certified roadside inspector examines a Class A combination vehicle and documents the following brake system conditions: (1) 20% of the vehicle’s brake chambers have push rod travel exceeding manufacturer specifications, (2) One slack adjuster on the left rear trailer axle is missing the locking pin, (3) The air compressor builds pressure from 85 PSI to 100 PSI in 40 seconds at idle, (4) Brake drums on two wheels show visible heat cracks. Based on CVSA North American Standard Out-of-Service Criteria, which analysis correctly identifies whether the vehicle is placed out of service?

12. Under FMCSA regulations, what blood alcohol concentration (BAC) level results in disqualification for a commercial driver operating a CMV?

13. While driving on a highway, a driver notices the trailer beginning to sway from side-to-side (trailer whip or fishtailing). What is the CORRECT immediate response to control trailer sway?

14. A CMV driver is traveling on a two-lane highway when another vehicle begins passing from behind. The passing vehicle is alongside but has not yet cleared the CMV’s front. What should the CMV driver do during this passing maneuver?

15. A CDL driver is operating a tractor-semitrailer on a rural highway at 10:30 PM. The driver notices increased glare from oncoming vehicle headlights and realizes the windshield has accumulated dust and grime from the day’s driving. What actions should the driver take to address the visibility hazard?

16. Which glad hand color indicates the emergency air line that supplies air to the trailer’s air tanks and spring brake system?

17. A driver needs to transport a single piece of heavy machinery weighing 95,000 lbs on a flatbed trailer. The standard federal gross weight limit for interstate highways is 80,000 lbs. Under what conditions can this shipment legally proceed, and what documentation is required?

18. A driver operating a tractor-semitrailer carrying hazardous materials approaches a railroad crossing with active flashing lights and a descending gate. Traffic is stopped ahead of the crossing, leaving approximately 40 feet between the stopped vehicle and the tracks. What is the correct stopping position and procedure at this crossing?

19. What is the minimum vision standard for a driver to qualify for a CDL under 49 CFR 391.41(b)(10)?

20. A driver needs to perform an offset backing maneuver to the RIGHT (passenger side). The loading dock is on the right side of the vehicle. Compared to offset backing to the LEFT (driver side), which statement BEST describes the additional challenge?

21. All of the following are required inspection types for commercial motor vehicle operation, EXCEPT:

22. You are driving a loaded tractor-semitrailer on a highway during a rainstorm when you begin to experience hydroplaning—the tires lose contact with the road surface and the vehicle feels like it is floating. The steering becomes unresponsive. What is the correct sequence of actions to recover from hydroplaning safely?

23. A driver is approaching a 4% downgrade in a loaded Class A combination vehicle. The posted speed limit is 55 mph. The driver selects 5th gear and begins the descent at 50 mph. After 1 mile, the driver notices the speed has increased to 58 mph and brake application is required more frequently than expected. Which analysis explains this situation and what corrective action is needed?

24. What is the definition of “reasonable suspicion” testing under 49 CFR Part 40 drug and alcohol testing regulations?

25. A driver is hauling a tanker trailer partially filled with liquid. Which statement BEST explains why this configuration presents a higher rollover risk than a fully loaded tanker?

26. A CDL driver transporting hazardous materials approaches a railroad crossing with multiple tracks. The crossing has passive warning signs but no active signals or gates. The driver stops and observes a train passing on the nearest track. After that train clears, the driver begins to proceed across the crossing. Which analysis of this situation is correct?

27. A driver comes on duty at 5:00 AM after 10 consecutive hours off duty. They drive from 5:00 AM to 9:00 AM, then perform 2 hours of loading work from 9:00 AM to 11:00 AM. At 11:00 AM, they begin driving again. How much longer can they drive before taking a required 30-minute break?

28. A driver is operating a tractor-semitrailer in heavy rain on an interstate highway. Visibility has dropped to approximately 400 feet. The driver observes that some passenger vehicles are driving without headlights while others have high beams activated. Which analysis correctly identifies the regulatory requirements and explains why the CMV driver’s approach differs from some passenger vehicle behavior?

29. When checking tire load ratings before loading cargo, a driver finds that each tire on the drive axle has a maximum load rating of 4,500 lbs. What is the maximum safe weight that can be carried on this dual-tire axle?

30. You are driving a tractor-semitrailer at night on a rural highway. Your speed is 55 MPH, and the road is dry with clear weather conditions. However, you notice that your headlights are properly adjusted but several vehicles ahead have dimmed their headlights when approaching oncoming traffic. At what distance from an oncoming vehicle should you dim your high beams to low beams?

31. A driver arrives at a receiver’s facility and must back into a dock space. The dock area is congested with other trucks, forklift traffic, and limited visibility. The driver cannot see the dock clearly from the cab. A worker at the facility offers to guide the backing maneuver but appears distracted and is talking on a phone. What is the driver’s BEST course of action?

32. A commercial motor vehicle passes its annual inspection on March 15, 2026. According to 49 CFR Section 396.17, when must the next annual inspection be completed?

33. A driver is making a left turn at a four-way intersection with moderate traffic. The turn lane is narrow, and there is a utility pole on the right side of the road the driver is turning onto, approximately 10 feet from the curb. Considering off-tracking, how should the driver approach this turn?

34. Which three items must be present in every commercial motor vehicle as part of the required emergency equipment?

35. A driver is operating a 65-foot combination vehicle at 55 MPH on a dry highway. What is the MINIMUM following distance the driver should maintain behind the vehicle ahead?

36. How do spring brakes (parking/emergency brakes) in an air brake system function differently from service brakes?

37. All of the following actions are required by federal regulations when a driver discovers an out-of-service condition during a pre-trip inspection, EXCEPT:

38. A driver completes a pre-trip inspection and discovers that two of the six reflective triangles in the emergency equipment kit are cracked and unusable. What action must the driver take?

39. According to AAMVA standards, which of the following is considered an “encroachment” during the CDL skills test?

40. A driver performs the service brake test during a pre-trip inspection by driving forward at approximately 5 MPH and applying the service brake firmly. The vehicle pulls significantly to the left during braking. What does this indicate and what action is required?

41. A driver is accelerating a loaded CMV from a stop at a traffic light onto a busy highway. Traffic is moving at 55 mph ahead. Which acceleration technique should the driver use?

42. A driver is operating a loaded tractor-semitrailer on an interstate during extreme heat (105°F ambient temperature). The driver notices the front steer tire pressure is higher than normal on the TPMS display. Which analysis is correct and what action should be taken?

43. A driver is approaching a left turn at a four-way intersection while operating a tractor-semitrailer. There is oncoming traffic in the opposite lane and vehicles behind the driver. What is the correct positioning and turn execution?

44. A driver has loaded a 7-foot-long steel beam weighing 1,500 pounds onto a flatbed trailer. The beam has sharp edges at both ends. What is the minimum number of tiedowns required, and what additional securement measure is necessary?

45. A driver weighs a loaded 5-axle tractor-semitrailer at a CAT scale and receives the following readout: steer axle 11,800 lbs, drive axle 22,500 lbs, trailer tandem 31,700 lbs, gross weight 66,000 lbs. The drive axle exceeds the 20,000 lbs single axle limit by 2,500 lbs. The trailer has sliding tandem axles. Describe the correct procedure to redistribute weight and achieve legal axle weights without adjusting cargo inside the trailer.

46. A driver is descending a 6% grade in a loaded tractor-semitrailer when the service brakes begin to fade from excessive heat. The driver notices reduced braking effectiveness and a soft brake pedal. What should the driver do immediately to prevent brake failure?

47. A driver starts a Class A tractor-semitrailer at 6:00 AM for a pre-trip inspection. The engine cranks and starts, but the oil pressure gauge remains at zero for 15 seconds before slowly rising to normal range. The driver notices this during the cab check. What action should the driver take?

48. A property-carrying driver begins duty at 6:00 AM. By 2:00 PM, the driver has driven a total of 6 hours with no breaks taken. The driver plans to continue driving for another 5 hours to complete the delivery. Which regulatory requirement will prevent this plan?

49. Which of the following brake conditions would place a commercial motor vehicle out of service according to CVSA criteria?

50. A commercial driver has consumed two 12-ounce beers and one shot of whiskey over a 2-hour period. The driver weighs 180 pounds. Based on the federal BAC limit for CMV operators, which statement is accurate?