1. You are approaching a construction zone on a four-lane highway. Work vehicles are present on the right shoulder, and workers are active near the roadway. Visibility is clear. What communication method should you use to alert workers and other drivers of your presence?

2. A driver needs to couple a tractor to a semitrailer. Place the following coupling steps in the correct sequence:

1. Position tractor in front of trailer
2. Connect air lines to trailer
3. Supply air to trailer and test trailer brakes
4. Back tractor under trailer until fifth wheel jaws lock
5. Check coupling security (tug test)
6. Connect electrical cord to trailer
7. Inspect fifth wheel and trailer kingpin area

What is the correct order for these coupling steps?

3. How far ahead should a commercial motor vehicle driver look to maintain proper visual search while driving at highway speed?

4. What is the correct procedure for a driver to log into an ELD before beginning a driving shift?

5. During a walk-around exterior inspection, a driver notices that one of the rear drive axle’s spring leaves is cracked halfway through its width. The spring is still attached and the axle appears to be sitting at normal height. The driver’s next destination is a repair shop 50 miles away. What is the correct decision regarding this defect?

6. A driver is descending a 5% mountain grade in rainy conditions with a loaded tractor-semitrailer. The driver applies the brakes firmly to slow from 45 MPH to 35 MPH, and the tractor immediately begins to skid with the trailer swinging to the right. The driver releases the brakes and counter-steers, but the trailer continues swinging until the combination reaches a full jackknife position. Which factor most likely initiated this jackknife sequence?

7. A driver builds air pressure to 130 PSI, but the pressure continues rising. What component has most likely failed?

8. During the CDL skills test, you are performing straight-line backing. You notice the trailer is drifting toward the right boundary line. What corrective action should you take FIRST?

9. A driver enters a construction zone posted at 45 mph while operating a loaded tractor-semitrailer. Workers are present near the roadway, and lane width is reduced. Traffic ahead is moving at approximately 35 mph. What speed should the driver maintain, and why?

10. A driver approaching a railroad-highway grade crossing with multiple tracks notices flashing lights and an approaching train on the nearest track. The driver stops at the required distance (15–50 feet) and waits. The train passes on the nearest track. The driver begins to proceed across the crossing without additional observation. What critical error has the driver made, and what should the correct procedure be?

11. A driver is preparing for a trip using a Class A tractor-semitrailer. During the pre-trip inspection, the driver notes the following: (1) The tractor’s annual inspection decal shows an expiration date of March 15, and today is April 21, (2) The trailer has no annual inspection decal visible, but the driver’s dispatcher claims the trailer was inspected “recently,” (3) The driver’s last DVIR from the previous trip was submitted but shows no acknowledgment signature from the motor carrier reviewing the report. Based on regulatory requirements, what violations exist and what action should the driver take?

12. You are backing a tractor-semitrailer toward a loading dock on the driver’s side. You need the trailer to move further to the left (toward the dock). How should you turn the steering wheel?

13. A CDL driver stops on a two-lane road at night due to a mechanical breakdown. The driver places one reflective triangle 50 feet behind the vehicle, another at 150 feet, and keeps the third triangle inside the cab for later use. A passing vehicle nearly strikes the stopped truck. What placement errors did the driver make?

14. What effect does improper weight distribution have on a commercial motor vehicle’s handling and safety?

15. When testing the parking brake during a pre-trip inspection, what procedure should the driver follow to verify proper function?

16. You are driving a tractor-semitrailer carrying hazardous materials and approaching a railroad-highway grade crossing that has a posted stop sign but no signals or gates. What is the correct procedure for crossing this railroad intersection?

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

18. What is the penalty when a CDL applicant looks outside the vehicle in the wrong direction during a backing maneuver on the skills test?

19. During the walk-around portion of a pre-trip inspection, what defects in the frame and crossmembers must the driver identify as unacceptable conditions?

20. A driver operating a 60-foot combination vehicle at 55 mph on wet pavement begins to feel the steering become light and unresponsive. The front tires appear to be losing contact with the road surface. The driver is 200 feet behind another vehicle. Which analysis correctly identifies the situation and the proper response sequence?

21. During the CDL skills test parallel parking exercise, an applicant positions the vehicle correctly, begins backing, and completes the maneuver with the vehicle fully within the boundaries. However, during the maneuver, the applicant stopped backing three times to pull forward and reposition, made two wrong-direction looks (looking forward while backing), and the vehicle touched the boundary line once at the final position. What is the total point score for this exercise?

22. What is the required minimum off-duty period for passenger-carrying drivers before they may drive again?

23. A driver is lowering the landing gear to uncouple a trailer but the crank handle spins freely without engaging the gear mechanism to raise or lower the legs. What is the most likely cause and what should the driver do?

24. A commercial driver takes an over-the-counter cold medication that the label states “may cause drowsiness.” The driver plans to operate a tractor-semitrailer on a 400-mile route. Which action is correct?

25. What is the purpose of the air dryer in an air brake system?

26. What is the function of an alcohol evaporator in an air brake system, and when should it be used?

27. You are making a right turn from a two-lane road onto a four-lane road in a tractor-semitrailer. A vehicle is waiting to turn left from the opposite direction in the oncoming lane. You observe that if you turn wide into the left lane of the four-lane road, the oncoming vehicle may turn simultaneously into the right lane. What is the safest analysis and action?

28. When transporting cargo on a flatbed trailer, at what point during the trip must the driver first check the cargo securement?

29. A CDL skills test applicant is performing the offset backing (right) exercise. The applicant must back the vehicle from one lane to an adjacent lane offset to the right. During the maneuver, the applicant makes three pull-ups, looks backward before each movement, touches the right boundary line once during backing, and finishes with the vehicle correctly positioned in the offset lane. What is the total point score for this exercise?

30. A driver completes a day of driving and performs the required post-trip inspection. The driver identifies a defect: the left rear brake light is not functioning (bulb burned out). The driver prepares a Driver Vehicle Inspection Report (DVIR) per 49 CFR Section 396.11. The motor carrier reviews the DVIR and notes that the vehicle will not be used until the brake light is repaired. The carrier signs the DVIR and schedules repair for the next morning. What additional requirement must the motor carrier satisfy regarding this DVIR before the vehicle is returned to service?

31. How frequently should a CDL driver check mirrors during normal highway driving, and what is the primary purpose of regular mirror checks?

32. During a pre-trip inspection, a driver builds air pressure to 125 PSI and turns off the engine. With the parking brake released and no brake pedal application, the pressure drops from 100 PSI to 94 PSI over three minutes. The driver then applies and holds the brake pedal, and the pressure drops another 2 PSI in one minute. How should this vehicle be classified?

33. During the engine compartment inspection portion of a pre-trip inspection, what is the maximum allowable belt deflection when pressing on the belt midway between pulleys?

34. A driver transporting logs on a flatbed trailer arrives at a weigh station 45 miles from the loading point. During inspection, the officer notes that some tiedowns have loosened and one chain shows signs of cutting at a sharp log end. The driver claims the cargo was properly secured at loading. What violations did the officer most likely identify, and what should the driver have done differently?

35. A driver reports a steering system defect on the DVIR at the end of a trip, noting excessive steering wheel play of approximately 3 inches. The carrier schedules repairs for the following week but continues dispatching the vehicle for daily local deliveries. What violation has occurred?

36. When must a CDL driver check the cargo and cargo securement devices during a trip?

37. A CDL applicant is preparing for the skills test and has difficulty with parallel parking on the driver’s side. The applicant’s trailer consistently ends up too far from the curb. Analysis shows the applicant is beginning the turn entry phase too early and not pulling forward far enough before backing. Which comprehensive correction strategy addresses both issues?

38. You are driving a 65-foot tractor-semitrailer combination at 55 MPH on a highway. According to the CDL following distance formula, what is the minimum following distance you should maintain behind the vehicle ahead?

39. A driver is backing a tractor-semitrailer into a dock when the trailer begins to angle sharply relative to the tractor. The driver recognizes this as an early stage of a jackknife developing during backing. What immediate action should the driver take to prevent the jackknife from worsening?

40. A driver uses the sleeper berth provision to split their required 10 hours off duty into two periods: 8 consecutive hours in the sleeper berth and 2 consecutive hours off duty. What is the result of this split sleeper berth period?

41. A safety official requests that a driver transfer ELD data during a roadside inspection. Which data transfer method must the ELD support per FMCSA regulations?

42. Which statement BEST explains why empty or lightly loaded commercial vehicles may require MORE stopping distance than fully loaded vehicles on dry pavement?

43. What is the minimum following distance formula for a commercial motor vehicle?

44. A CDL driver is involved in a single-vehicle accident where the combination vehicle drifted off the right side of a highway, struck a guardrail, and sustained minor damage with no injuries. The driver had been operating for 9 hours and admits to feeling drowsy before the accident. Law enforcement arrives and the driver receives a citation for failure to maintain lane. A post-accident drug test shows trace amounts of a prescription medication that causes drowsiness, which the driver had been taking for a legitimate medical condition. Which analysis correctly evaluates the regulatory and safety implications of this situation?

45. At the end of a driving day, a driver completes a DVIR noting that the right front turn signal bulb is burned out. The driver submits the report to the carrier’s maintenance department and the carrier’s dispatcher calls to say the vehicle will be dispatched again the following morning. What action must occur before the driver operates the vehicle the next day?

46. When uncoupling a tractor from a trailer, what should the driver do BEFORE lowering the landing gear?

47. A loaded tanker truck is approaching a steep downgrade when the driver notices the service brakes are fading. An escape ramp is visible 1 mile ahead. The driver accelerates slightly to reach the ramp faster, then applies maximum braking at the ramp entrance. The truck fails to stop in the ramp and crashes into the barrier. What errors led to this outcome?

48. A driver is approaching a highway exit ramp at 55 MPH with a loaded combination vehicle. The ramp has a posted advisory speed of 25 MPH. The driver enters the curve without reducing speed and feels the trailer beginning to lean. What error did the driver make, and what is the IMMEDIATE correct response?

49. During the parking brake test portion of a pre-trip inspection, what procedure should the driver follow to verify the parking brake is functioning correctly?

50. What is the federal maximum gross vehicle weight (GVW) for interstate travel under the bridge formula provisions of 49 CFR Section 658.17?