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CDL general knowledge marathon

Selected knowledge practice, not a complete licensing course or practical training.

New Jersey CDL General Knowledge Marathon

Practice mode
Question 1 of 70
  1. 1. Your delivery truck must reverse beneath an unfamiliar loading canopy. What should you do before moving?
  2. 2. A coworker offers to guide your truck backward. What should you settle before the maneuver begins?
  3. 3. You can reposition a truck to back around a corner toward either side. Which setup generally gives you the better view?
  4. 4. In an unsynchronized manual truck, you stay in neutral too long during an upshift and the next gear will not engage. What is the safer response?
  5. 5. You checked the mirrors, then signaled a lane change. Why check the mirrors again before moving over?
  6. 6. A car looks small and far away in your truck's convex mirror. What should you allow for?
  7. 7. While checking traffic around your truck, which mirror-scanning habit best keeps the road ahead under observation?
  8. 8. A driver behind your slow truck gestures for you to signal when passing will be safe. What is the sound practice?
  9. 9. Your loaded truck needs to slow substantially for a tight turn, and a car is following. How should you make the slowdown predictable?
  10. 10. A driver estimates stopping space using only the distance traveled after the brakes begin working. What has been left out?
  11. 11. On a cold morning the road looks clear, but you are approaching a bridge. Why should you be especially alert there?
  12. 12. Your truck begins hydroplaning on standing water. You have room ahead and are not about to collide. How should you begin reducing speed?
  13. 13. You are approaching a curve in a tall, loaded truck. A car ahead takes it at the posted speed. What should determine your approach?
  14. 14. A car follows your truck too closely. Why is increasing your gap from the vehicle ahead a useful response?
  15. 15. A car has stayed beside your truck for a long stretch. When traffic permits, which positioning habit best preserves side space?
  16. 16. An empty box truck is leaving a tunnel into strong crosswinds. Which precaution is most appropriate?
  17. 17. Your cargo van passed under a low structure when fully loaded. It is now empty. What should you assume about the return trip?
  18. 18. After loading, your truck must cross a drainage dip in an unpaved yard. What clearance issue deserves a fresh check?
  19. 19. You are entering a road with a heavily loaded truck. Why might a gap you would accept in a car be inadequate?
  20. 20. A high-sided truck travels beside a sharp pavement-edge drop near tree limbs. What hazard can occur if its wheels drop off?
  21. 21. A crumpled carton lies ahead in your lane. Why should you avoid assuming it is harmless?
  22. 22. Only the rear of a van is visible beyond an alley wall; you cannot see its driver. What is the safer expectation as your truck approaches?
  23. 23. A car ahead wanders within its lane and repeatedly speeds up and slows down. What is a prudent response?
  24. 24. Your delivery destination has changed while the truck is safely parked. When should you enter the new route?
  25. 25. At night, oncoming lights scatter across a windshield that looked clear in daylight. What preparation helps address this?
  26. 26. The cab's interior light makes the road outside harder to see. What adjustment is appropriate?
  27. 27. In fog, you see taillights ahead but cannot see the roadway clearly. Why should you not use those lights alone to guide your truck?
  28. 28. Before climbing into the truck after a snowfall, what should you do about ice on the steps and handholds?
  29. 29. After driving on a hot day, tire pressure has risen above the earlier cold reading. Should you bleed air merely to restore that cold reading?
  30. 30. A clear escape path lets you steer around an immediate obstacle. What steering approach helps avoid creating a second emergency?
  31. 31. After avoiding a collision, your truck is on a clear shoulder and can safely stop there. What should you do before returning to the road?
  32. 32. Your truck's brakes have failed on a downgrade, and a signed escape ramp is available ahead. What is the safest choice?
  33. 33. A front tire blows on a clear, straight road. No collision is imminent. What should you do first?
  34. 34. At dusk in rain, your truck's clearance lights are on but it is still hard for others to see you. What does the manual recommend?
  35. 35. A truck's drive wheels spin as you accelerate on an icy patch. What should you do with the accelerator?
  36. 36. Smoke from your truck makes an immediate safe stop necessary. Where should you pull off, if available?
  37. 37. You are arranging heavy cases and light cartons in a truck. Which arrangement improves stability?
  38. 38. Most of a truck's load has been moved toward the rear, leaving the steering axle unusually light. What is the handling concern?
  39. 39. A planned load meets the applicable weight limits, but the route has steep grades and bad weather. What should the driver conclude?
  40. 40. You need to keep a rigid load from sliding along a truck's cargo deck. Which setup describes effective blocking?
  41. 41. A driver keeps overlooking inspection items after choosing a different walk-around order each day. Which habit does the manual recommend to reduce omissions?
  42. 42. An inspection finds that two tires in a dual assembly are touching. Why is this more than a clearance concern?
  43. 43. A truck has a leaking exhaust connection near its cab and sleeper. What passenger or driver hazard makes the leak important even if the engine runs normally?
  44. 44. A hydraulic-brake truck is secured for its prescribed stationary leak check. While firm pedal pressure is held, the pedal continues sinking. How should that result be treated?
  45. 45. During a trip, a new vibration suggests something may be wrong, although the truck's gauges remain normal. What should guide the driver's response?
  46. 46. A truck has a retarder that applies slowing force to the drive wheels. Why is its use a concern when those wheels have poor grip on ice?
  47. 47. A truck driver watches the nearest vehicle closely but repeatedly notices traffic queues only at the last moment. Which observation habit would help?
  48. 48. A long construction zone continues after the first visible group of workers. Which habit helps keep a truck's speed from unintentionally increasing farther into the zone?
  49. 49. An angry driver gestures at your truck and tries to get ahead of you. When traffic permits, which response best follows the manual's guidance?
  50. 50. On an unlit road, a truck would need more distance to stop than the driver can see clearly in its headlights. What adjustment is needed?
  51. 51. A truck's headlights are clean and lit, but their beams point away from the useful roadway view and trouble oncoming drivers. What should be done?
  52. 52. At night, an oncoming vehicle's bright headlights create glare. A right lane-edge marking is visible. Where should you direct your gaze while maintaining your course?
  53. 53. Your eyelids are growing heavy during a truck trip, although the destination is not far away. Which response addresses the immediate driving risk?
  54. 54. You can choose between otherwise suitable trip schedules. Which plan better follows the manual's fatigue-prevention guidance?
  55. 55. Dense fog is making visibility dangerously poor, and you can safely enter a designated truck stop before continuing. Which choice follows the manual's preferred approach?
  56. 56. A truck's wipers fail during wintry precipitation, and the driver can no longer see well enough to continue safely. What should the driver do?
  57. 57. A planned winter route may require tire chains. Which preparation should happen before the driver faces snow and ice along the route?
  58. 58. In freezing conditions, the roadway looks wet, but nearby vehicles have stopped throwing up spray. What should that observation suggest?
  59. 59. After heavy rain has wetted a truck's brakes, why should the driver be alert for more than simply a longer stop?
  60. 60. A truck uses a winterfront over its radiator. Why should the driver avoid leaving it closed too tightly, even in cold weather?
  61. 61. While driving, the coolant-temperature gauge rises above the highest safe temperature specified for this truck. What is the appropriate response?
  62. 62. On a very hot day, patches of tar have risen to the road surface. What traction concern does the manual identify?
  63. 63. Before a long, steep descent, a driver plans to wait until the truck gains speed before selecting the needed lower gear. What is the concern with that plan?
  64. 64. A modern truck climbs a hill comfortably in a relatively high gear. Does that prove the same gear will provide enough control going down that hill?
  65. 65. On a long, steep downgrade with good traction, a truck is in the appropriate low gear. Why should engine braking carry much of the speed-control work?
  66. 66. After a vehicle fire has been reported and people are clear, the driver is unsure whether the available extinguisher is suitable. What should the driver do?
  67. 67. A box truck with a cargo fire is safely stopped, everyone is clear, and firefighters have been called. Why should the driver avoid opening the closed cargo doors to inspect the fire?
  68. 68. A cargo vehicle has a front-end header board, sometimes called a headache rack. What movement is that structure intended to resist during an emergency stop?
  69. 69. A load inside a closed cargo van can slide across the floor. A coworker says tie-downs matter only on open trailers. What is the sound correction?
  70. 70. While driving, you notice the cargo cover flapping loose in a mirror. Why does it deserve attention even though the cargo beneath it has not moved?
Review all 70 questions with answers

  1. Your delivery truck must reverse beneath an unfamiliar loading canopy. What should you do before moving?

    Correct answer: Get out and check the entire backing path

    Walk the intended path and check side, overhead and nearby hazards. A view from the cab alone may miss an obstruction.

    Source: New Jersey CDL Manual, March 2025 cover; Section 2, July 2017 footer; printed 2-9 (physical 27); 2.2.4 Backing Safely, Look at Your Path. ↗

  2. A coworker offers to guide your truck backward. What should you settle before the maneuver begins?

    Correct answer: Hand signals, including a clear stop signal

    Both people should understand the signals before backing. The helper should remain where the driver can see them.

    Source: New Jersey CDL Manual, March 2025 cover; Section 2, July 2017 footer; printed 2-9 (physical 27); 2.2.4 Backing Safely, Use a Helper. ↗

  3. You can reposition a truck to back around a corner toward either side. Which setup generally gives you the better view?

    Correct answer: Back toward the driver's side

    Driver-side backing improves the driver's view of the rear through the side window. Repositioning first can be worth the added time.

    Source: New Jersey CDL Manual, March 2025 cover; Section 2, July 2017 footer; printed 2-9 (physical 27); 2.2.4 Backing Safely, Back and Turn Toward the Driver's Side. ↗

  4. In an unsynchronized manual truck, you stay in neutral too long during an upshift and the next gear will not engage. What is the safer response?

    Correct answer: Match engine speed in neutral, then try again

    Do not force a missed shift. Return to neutral, release the clutch, match engine speed to road speed and try again; the technique requires practice.

    Source: New Jersey CDL Manual, March 2025 cover; Section 2, July 2017 footer; printed 2-9 (physical 27); 2.3.1 Manual Transmissions, Basic Method for Shifting Up. ↗

  5. You checked the mirrors, then signaled a lane change. Why check the mirrors again before moving over?

    Correct answer: A vehicle may have entered your blind spot

    Traffic positions can change after the first check. Recheck after signaling and continue checking as the lane change begins and finishes.

    Source: New Jersey CDL Manual, March 2025 cover; Section 2, July 2017 footer; printed 2-11 (physical 29); 2.4.2 Seeing to the Sides and Rear, Lane Changes. ↗

  6. A car looks small and far away in your truck's convex mirror. What should you allow for?

    Correct answer: It may be closer than it appears

    Convex mirrors widen the view but make objects appear smaller and farther away. Do not judge a passing gap as though the image were a direct view.

    Source: New Jersey CDL Manual, March 2025 cover; Section 2, July 2017 footer; printed 2-11 (physical 29); 2.4.2 Seeing to the Sides and Rear, How to Use Mirrors; Figure 2.7. ↗

  7. While checking traffic around your truck, which mirror-scanning habit best keeps the road ahead under observation?

    Correct answer: Take brief looks, then return to the road

    Use brief mirror checks and return attention to the road ahead. Long mirror fixation lets the truck travel without monitoring developing hazards in front.

    Source: New Jersey CDL Manual, March 2025 cover; Section 2, July 2017 footer; printed 2-11 (physical 29); 2.4.2 Seeing to the Sides and Rear, How to Use Mirrors. ↗

  8. A driver behind your slow truck gestures for you to signal when passing will be safe. What is the sound practice?

    Correct answer: Do not direct the other driver to pass

    Do not take over another driver's passing decision. A reassuring wave can be misunderstood or overlook a hazard the other driver will encounter.

    Source: New Jersey CDL Manual, March 2025 cover; Section 2, July 2017 footer; printed 2-12 (physical 30); 2.5.1 Signal Your Intentions, Don't Direct Traffic. ↗

  9. Your loaded truck needs to slow substantially for a tight turn, and a car is following. How should you make the slowdown predictable?

    Correct answer: Signal early and slow gradually

    Early signaling and gradual braking give following drivers time to recognize that a large vehicle needs a slow turn.

    Source: New Jersey CDL Manual, March 2025 cover; Section 2, July 2017 footer; printed 2-12 (physical 30); 2.5.1 Signal Your Intentions, Turns and Slowing Down / Tight Turns. ↗

  10. A driver estimates stopping space using only the distance traveled after the brakes begin working. What has been left out?

    Correct answer: Distance used to recognize and react to danger

    The truck keeps moving while the driver perceives the danger and reacts. Total stopping space includes those distances as well as braking distance.

    Source: New Jersey CDL Manual, March 2025 cover; Section 2, July 2017 footer; printed 2-14 (physical 32); 2.6.1 Stopping Distance, Perception / Reaction / Braking / Total Stopping Distance. ↗

  11. On a cold morning the road looks clear, but you are approaching a bridge. Why should you be especially alert there?

    Correct answer: The bridge can freeze before nearby pavement

    Bridge surfaces can freeze sooner than nearby roads. Clear pavement before the bridge does not establish traction on the bridge itself.

    Source: New Jersey CDL Manual, March 2025 cover; Section 2, July 2017 footer; printed 2-15 (physical 33); 2.6.2 Matching Speed to the Road Surface, Identifying Slippery Surfaces / Bridges. ↗

  12. Your truck begins hydroplaning on standing water. You have room ahead and are not about to collide. How should you begin reducing speed?

    Correct answer: Ease off the accelerator; avoid braking

    Reduce power so the truck slows and the tires can regain road contact. Braking while hydroplaning can worsen loss of control; in a manual vehicle, the manual also calls for disengaging the clutch.

    Source: New Jersey CDL Manual, March 2025 cover; Section 2, July 2017 footer; printed 2-15 (physical 33); 2.6.2 Matching Speed to the Road Surface, Hydroplaning. ↗

  13. You are approaching a curve in a tall, loaded truck. A car ahead takes it at the posted speed. What should determine your approach?

    Correct answer: Slow before the curve to a safe speed for your truck

    A posted curve speed may still be too fast for a truck with a high center of gravity. Reduce speed before turning rather than combining hard braking with the curve.

    Source: New Jersey CDL Manual, March 2025 cover; Section 2, July 2017 footer; printed 2-15 (physical 33); 2.6.3 Speed and Curves. ↗

  14. A car follows your truck too closely. Why is increasing your gap from the vehicle ahead a useful response?

    Correct answer: It gives you more room to slow gradually

    More space ahead reduces the need for sudden slowing or steering. Avoid speeding up or using brake-light tricks against a tailgater.

    Source: New Jersey CDL Manual, March 2025 cover; Section 2, July 2017 footer; printed 2-17 (physical 35); 2.7.2 Space Behind, Dealing with Tailgaters Safely. ↗

  15. A car has stayed beside your truck for a long stretch. When traffic permits, which positioning habit best preserves side space?

    Correct answer: Find an open position away from the car

    Traveling beside another vehicle leaves little escape room if either driver moves laterally. Seek separation rather than remaining boxed in.

    Source: New Jersey CDL Manual, March 2025 cover; Section 2, July 2017 footer; printed 2-17, 2-18 (physical 35, 36); 2.7.3 Space to the Sides, Traveling Next to Others. ↗

  16. An empty box truck is leaving a tunnel into strong crosswinds. Which precaution is most appropriate?

    Correct answer: Avoid emerging beside another vehicle if possible

    Crosswinds can be especially difficult at tunnel exits, and lighter vehicles are more affected. Extra side space reduces the consequences of a gust.

    Source: New Jersey CDL Manual, March 2025 cover; Section 2, July 2017 footer; printed 2-18 (physical 36); 2.7.3 Space to the Sides, Strong Winds. ↗

  17. Your cargo van passed under a low structure when fully loaded. It is now empty. What should you assume about the return trip?

    Correct answer: Clearance must be checked again

    Unloading can raise a van's body. A safe passage while loaded is not proof that the empty vehicle will fit under the same structure.

    Source: New Jersey CDL Manual, March 2025 cover; Section 2, July 2017 footer; printed 2-18 (physical 36); 2.7.4 Space Overhead. ↗

  18. After loading, your truck must cross a drainage dip in an unpaved yard. What clearance issue deserves a fresh check?

    Correct answer: The underside or ends may drag

    A heavy load can reduce the space beneath the vehicle. Drainage dips may cause its underside or ends to strike the ground.

    Source: New Jersey CDL Manual, March 2025 cover; Section 2, July 2017 footer; printed 2-18 (physical 36); 2.7.5 Space Below. ↗

  19. You are entering a road with a heavily loaded truck. Why might a gap you would accept in a car be inadequate?

    Correct answer: The truck needs more time and space to accelerate

    Truck size and slower acceleration increase the space needed to enter or cross traffic. A heavier load calls for a larger margin.

    Source: New Jersey CDL Manual, March 2025 cover; Section 2, July 2017 footer; printed 2-19 (physical 37); 2.7.7 Space Needed to Cross or Enter Traffic. ↗

  20. A high-sided truck travels beside a sharp pavement-edge drop near tree limbs. What hazard can occur if its wheels drop off?

    Correct answer: The truck can tilt and strike an overhead object

    An edge drop can tilt the truck toward roadside objects. It also complicates steering back across the edge, so recognize and avoid the hazard early.

    Source: New Jersey CDL Manual, March 2025 cover; Section 2, July 2017 footer; printed 2-19 (physical 37); 2.8.2 Hazardous Roads, Drop Off. ↗

  21. A crumpled carton lies ahead in your lane. Why should you avoid assuming it is harmless?

    Correct answer: It may hide material that can damage the truck

    A box or sack can conceal heavy or solid contents. Spot debris early so you can avoid it without an abrupt, unsafe maneuver.

    Source: New Jersey CDL Manual, March 2025 cover; Section 2, July 2017 footer; printed 2-19, 2-20 (physical 37, 38); 2.8.2 Hazardous Roads, Foreign Objects. ↗

  22. Only the rear of a van is visible beyond an alley wall; you cannot see its driver. What is the safer expectation as your truck approaches?

    Correct answer: The van may enter before its driver sees you

    A driver whose view is blocked may enter or reverse into your path. Anticipate the possible movement and be ready to stop.

    Source: New Jersey CDL Manual, March 2025 cover; Section 2, July 2017 footer; printed 2-20 (physical 38); 2.8.3 Drivers Who Are Hazards, Blocked Vision. ↗

  23. A car ahead wanders within its lane and repeatedly speeds up and slows down. What is a prudent response?

    Correct answer: Leave more room and watch for an unexpected move

    These are possible distraction clues. Maintain a safe gap and be cautious about passing because the driver may not notice your presence.

    Source: New Jersey CDL Manual, March 2025 cover; Section 2, July 2017 footer; printed 2-24 (physical 42); 2.9.7 Watch Out for Other Distracted Drivers. ↗

  24. Your delivery destination has changed while the truck is safely parked. When should you enter the new route?

    Correct answer: While parked, before you start moving

    Plan the route and program navigation before moving. A slow or straight section of road still requires attention to driving.

    Source: New Jersey CDL Manual, March 2025 cover; Section 2, July 2017 footer; printed 2-24 (physical 42); 2.9.6 Don't Drive Distracted, continued pre-trip map/GPS bullet. ↗

  25. At night, oncoming lights scatter across a windshield that looked clear in daylight. What preparation helps address this?

    Correct answer: Clean both sides of the windshield

    Dirt on either surface can create glare and obstruct the view. Clean the windshield inside and outside; dark glasses are not an appropriate night-driving fix.

    Source: New Jersey CDL Manual, March 2025 cover; Section 2, July 2017 footer; printed 2-27 (physical 45); 2.11.4 Vehicle Factors, Windshield and Mirrors; 2.11.5 Vehicle Procedures. ↗

  26. The cab's interior light makes the road outside harder to see. What adjustment is appropriate?

    Correct answer: Keep the cab dark; leave gauges readable

    Excess cab light interferes with the outside view. Keep the interior light off and reduce instrument brightness only as far as you can still read the gauges.

    Source: New Jersey CDL Manual, March 2025 cover; Section 2, July 2017 footer; printed 2-28 (physical 46); 2.11.5 Night Driving Procedures, Use High Beams When You Can / cab-light paragraph. ↗

  27. In fog, you see taillights ahead but cannot see the roadway clearly. Why should you not use those lights alone to guide your truck?

    Correct answer: They may belong to a vehicle off the roadway

    A vehicle's lights may be on the shoulder or otherwise off the road. Do not mistake them for a reliable guide to the road's path; the manual recommends waiting at a safe off-road location when visibility is poor.

    Source: New Jersey CDL Manual, March 2025 cover; Section 2, July 2017 footer; printed 2-28 (physical 46); 2.12 Driving in Fog, parked-vehicle/light warning. ↗

  28. Before climbing into the truck after a snowfall, what should you do about ice on the steps and handholds?

    Correct answer: Clear the steps and handholds before climbing

    Clear access surfaces as part of winter preparation. Ice on steps and handholds creates a slipping hazard independent of road visibility.

    Source: New Jersey CDL Manual, March 2025 cover; Section 2, July 2017 footer; printed 2-29 (physical 47); 2.13.1 Vehicle Checks, Hand Holds, Steps, and Deck Plates. ↗

  29. After driving on a hot day, tire pressure has risen above the earlier cold reading. Should you bleed air merely to restore that cold reading?

    Correct answer: No; it may leave the cooled tire underinflated

    Tire pressure normally rises as temperature rises. Releasing air to match the cold reading can leave inadequate pressure after cooling; an excessively hot tire requires stopping and cooling, not that shortcut.

    Source: New Jersey CDL Manual, March 2025 cover; Section 2, July 2017 footer; printed 2-29 (physical 47); 2.14.1 Vehicle Checks, Tires. ↗

  30. A clear escape path lets you steer around an immediate obstacle. What steering approach helps avoid creating a second emergency?

    Correct answer: Steer only enough to clear it, then counter-steer

    Excessive steering increases skid and rollover risk. Clearing the obstacle and promptly steering back to control the path are parts of the same maneuver; this skill needs practice.

    Source: New Jersey CDL Manual, March 2025 cover; Section 2, July 2017 footer; printed 2-34 (physical 52); 2.17.1 Steering to Avoid a Crash, How to Turn Quickly and Safely. ↗

  31. After avoiding a collision, your truck is on a clear shoulder and can safely stop there. What should you do before returning to the road?

    Correct answer: Stop there, then signal and check before reentering

    When the shoulder is clear, remain there until stopped. Reenter only after signaling and checking mirrors; an unnecessary high-speed return adds risk.

    Source: New Jersey CDL Manual, March 2025 cover; Section 2, July 2017 footer; printed 2-34 (physical 52); 2.17.1 Steering to Avoid a Crash, Leaving the Road / Stay on the Shoulder. ↗

  32. Your truck's brakes have failed on a downgrade, and a signed escape ramp is available ahead. What is the safest choice?

    Correct answer: Use the escape ramp now

    An escape ramp is intended to stop a runaway vehicle. Delay lets speed build and can make the eventual stop much more dangerous.

    Source: New Jersey CDL Manual, March 2025 cover; Section 2, July 2017 footer; printed 2-35 (physical 53); 2.17.3 Brake Failure, Brake Failure on Downgrades. ↗

  33. A front tire blows on a clear, straight road. No collision is imminent. What should you do first?

    Correct answer: Grip the wheel firmly and let the truck slow

    Keep a firm two-handed grip and avoid braking until the truck has slowed, unless needed to avoid an immediate collision. Then brake gently and stop safely.

    Source: New Jersey CDL Manual, March 2025 cover; Section 2, July 2017 footer; printed 2-35, 2-36 (physical 53, 54); 2.17.4 Tire Failure, Respond to Tire Failure and Check the Tires. ↗

  34. At dusk in rain, your truck's clearance lights are on but it is still hard for others to see you. What does the manual recommend?

    Correct answer: Use low-beam headlights, not clearance lights alone

    Headlights make the vehicle easier to see in poor light. The manual recommends low beams rather than relying only on identification or clearance lights.

    Source: New Jersey CDL Manual, March 2025 cover; Section 2, July 2017 footer; printed 2-12 (physical 30); 2.5.2 Communicating Your Presence, When It's Hard to See. ↗

  35. A truck's drive wheels spin as you accelerate on an icy patch. What should you do with the accelerator?

    Correct answer: Ease off to help the tires regain grip

    Reducing power helps stop an acceleration skid. Additional throttle keeps the wheels spinning instead of restoring traction.

    Source: New Jersey CDL Manual, March 2025 cover; Section 2, July 2017 footer; printed 2-37 (physical 55); 2.19 Skid Control and Recovery, Over-acceleration; 2.19.1 Drive-wheel Skids. ↗

  36. Smoke from your truck makes an immediate safe stop necessary. Where should you pull off, if available?

    Correct answer: An open area away from things that could burn

    Stop in an open area separated from buildings, vegetation and other vehicles, then notify emergency services. Do not take a burning vehicle into a service station.

    Source: New Jersey CDL Manual, March 2025 cover; Section 2, July 2017 footer; printed 2-39 (physical 57); 2.21.3 Fire Fighting, Pull Off the Road. ↗

  37. You are arranging heavy cases and light cartons in a truck. Which arrangement improves stability?

    Correct answer: Heavy cases low, with light cartons above

    Keeping heavy cargo low reduces the vehicle's center of gravity and its tendency to roll over in a curve or evasive maneuver.

    Source: New Jersey CDL Manual, March 2025 cover; Section 3, July 2017 footer; printed 3-2 (physical 65); 3.2.3 Don't Be Top-heavy; Figure 3.1. ↗

  38. Most of a truck's load has been moved toward the rear, leaving the steering axle unusually light. What is the handling concern?

    Correct answer: Too little steering-axle load can impair control

    Poor front-to-rear balance can leave too little weight on the steering axle for safe control. Total weight alone does not describe how the load affects handling.

    Source: New Jersey CDL Manual, March 2025 cover; Section 3, July 2017 footer; printed 3-2 (physical 65); 3.2.4 Balance the Weight. ↗

  39. A planned load meets the applicable weight limits, but the route has steep grades and bad weather. What should the driver conclude?

    Correct answer: Legal weight may still be unsafe for this route

    Legal weight compliance is not a guarantee of safe operation. Grade and weather conditions can make operating at the maximum unsafe.

    Source: New Jersey CDL Manual, March 2025 cover; Section 3, July 2017 footer; printed 3-1, 3-2 (physical 64, 65); 3.2.2 Legal Weight Limits, continued safety qualification. ↗

  40. You need to keep a rigid load from sliding along a truck's cargo deck. Which setup describes effective blocking?

    Correct answer: Snug blocks secured to the deck beside the load

    Blocking fits closely against cargo and is secured to the deck so it can resist movement. Loose or misplaced pieces do not provide the described restraint.

    Source: New Jersey CDL Manual, March 2025 cover; Section 3, July 2017 footer; printed 3-2 (physical 65); 3.3.1 Blocking and Bracing. ↗

  41. A driver keeps overlooking inspection items after choosing a different walk-around order each day. Which habit does the manual recommend to reduce omissions?

    Correct answer: Use the same systematic inspection method each time

    A consistent inspection method helps the driver learn the sequence and avoid forgetting items. This is a daily safety habit, not a statement about an examiner's scoring rules.

    Source: New Jersey CDL Manual, March 2025 cover; Section 2, July 2017 footer, printed 2-3, physical 21 > 2.1.5 Seven-step Inspection Method > Method of Inspection ↗

  42. An inspection finds that two tires in a dual assembly are touching. Why is this more than a clearance concern?

    Correct answer: Touching duals can contribute to a tire fire

    The manual lists touching dual tires among causes of vehicle fires. This defect needs attention even if neither tire appears to be losing air.

    Source: New Jersey CDL Manual, March 2025 cover; Section 2, July 2017 footer, printed 2-39, physical 57 > 2.21.1 Causes of Fire > Tires ↗

  43. A truck has a leaking exhaust connection near its cab and sleeper. What passenger or driver hazard makes the leak important even if the engine runs normally?

    Correct answer: Poisonous exhaust can enter the cab or sleeper

    A damaged exhaust system can allow poisonous fumes into occupied areas. Normal engine performance and closed windows do not establish that those spaces are safe.

    Source: New Jersey CDL Manual, March 2025 cover; Section 2, July 2017 footer, printed 2-3, physical 21 > 2.1.3 What to Look For > Exhaust System Defects ↗

  44. A hydraulic-brake truck is secured for its prescribed stationary leak check. While firm pedal pressure is held, the pedal continues sinking. How should that result be treated?

    Correct answer: As a possible leak or fault needing repair

    During the described held-pressure check, the pedal should not keep moving. Movement can indicate a hydraulic leak or another problem that must be corrected before driving. This item is not the complete test setup or procedure.

    Source: New Jersey CDL Manual, March 2025 cover; Section 2, July 2017 footer, printed 2-7, physical 25 > 2.1.5 Seven-step Inspection Method > Step 7 > Test for Hydraulic Leaks ↗

  45. During a trip, a new vibration suggests something may be wrong, although the truck's gauges remain normal. What should guide the driver's response?

    Correct answer: Find a safe place to stop and investigate

    En-route monitoring includes what the driver sees, hears, smells, and feels, not just instrument readings. A possible problem needs investigation even when a gauge has not indicated it.

    Source: New Jersey CDL Manual, March 2025 cover; Section 2, July 2017 footer, printed 2-7, physical 25 > 2.1.6 Inspection during a Trip > Check Vehicle Operation Regularly ↗

  46. A truck has a retarder that applies slowing force to the drive wheels. Why is its use a concern when those wheels have poor grip on ice?

    Correct answer: Its slowing force can make the drive wheels skid

    The manual warns that retarder force can cause drive-wheel skidding when traction is poor. Drivers must understand their actual retarder and its operating instructions; this item does not assume identical controls on every vehicle.

    Source: New Jersey CDL Manual, March 2025 cover; Section 2, July 2017 footer, printed 2-10, physical 28 > 2.3.4 Retarders > Caution ↗

  47. A truck driver watches the nearest vehicle closely but repeatedly notices traffic queues only at the last moment. Which observation habit would help?

    Correct answer: Shift attention between nearby conditions and farther ahead

    Looking well ahead provides time and room to plan a slowdown or lane change. The manual also says to keep checking nearby conditions, rather than fixing attention at either distance alone.

    Source: New Jersey CDL Manual, March 2025 cover; Section 2, July 2017 footer, printed 2-10, physical 28 > 2.4.1 Seeing Ahead ↗

  48. A long construction zone continues after the first visible group of workers. Which habit helps keep a truck's speed from unintentionally increasing farther into the zone?

    Correct answer: Check the speedometer and control any speed increase

    The manual specifically warns about speed creeping upward through long construction areas. Monitoring the speedometer supports continued control; the absence of workers at one point does not end the work zone.

    Source: New Jersey CDL Manual, March 2025 cover; Section 2, July 2017 footer, printed 2-16, physical 34 > 2.6.7 Roadway Work Zones ↗

  49. An angry driver gestures at your truck and tries to get ahead of you. When traffic permits, which response best follows the manual's guidance?

    Correct answer: Let them go ahead safely and avoid reacting

    Avoid challenging an aggressive driver, reacting to gestures, or competing for position. Make room for the driver to get away from you when it is safe to do so.

    Source: New Jersey CDL Manual, March 2025 cover; Section 2, July 2017 footer, printed 2-24, physical 42 > 2.10.3 What You Should Do When Confronted by an Aggressive Driver ↗

  50. On an unlit road, a truck would need more distance to stop than the driver can see clearly in its headlights. What adjustment is needed?

    Correct answer: Slow enough to stop within the visible distance

    At night, stopping distance must fit within the distance illuminated well enough to see a hazard. Otherwise, an obstacle may become visible too late to stop for it.

    Source: New Jersey CDL Manual, March 2025 cover; Section 2, July 2017 footer, printed 2-27, physical 45 > 2.11.4 Vehicle Factors > Headlights ↗

  51. A truck's headlights are clean and lit, but their beams point away from the useful roadway view and trouble oncoming drivers. What should be done?

    Correct answer: Have a qualified person check the headlight aim

    Clean, functioning lamps can still be misadjusted. Incorrect aim can reduce the driver's view and create glare for others, so the manual calls for qualified adjustment.

    Source: New Jersey CDL Manual, March 2025 cover; Section 2, July 2017 footer, printed 2-27, physical 45 > 2.11.4 Vehicle Factors > Headlights > adjustment ↗

  52. At night, an oncoming vehicle's bright headlights create glare. A right lane-edge marking is visible. Where should you direct your gaze while maintaining your course?

    Correct answer: Slightly right toward the lane or edge marking

    The manual recommends avoiding a direct stare at oncoming lamps and looking slightly right toward a lane or edge marking if available. This changes the viewing reference, not the vehicle's lane position.

    Source: New Jersey CDL Manual, March 2025 cover; Section 2, July 2017 footer, printed 2-27, physical 45 > 2.11.5 Night Driving Procedures > Avoid Glare from Oncoming Vehicles ↗

  53. Your eyelids are growing heavy during a truck trip, although the destination is not far away. Which response addresses the immediate driving risk?

    Correct answer: Stop at a safe place and get sleep

    Sleepiness is a reason to stop driving at a safe location and get sleep. An open window or caffeine alone is not a dependable substitute. This item gives no universal nap duration or return-to-driving guarantee.

    Source: New Jersey CDL Manual, March 2025 cover; Section 2, July 2017 footer, printed 2-28, physical 46 > 2.11.5 Night Driving Procedures > If You Get Sleepy, Stop at the Nearest Safe Place ↗

  54. You can choose between otherwise suitable trip schedules. Which plan better follows the manual's fatigue-prevention guidance?

    Correct answer: Plan normal waking hours and identify stopping places

    Before a trip, plan its distance and stopping locations and, when possible, drive during the hours you are normally awake. This complements adequate sleep; it does not replace applicable hours-of-service rules.

    Source: New Jersey CDL Manual, March 2025 cover; Section 2, July 2017 footer, printed 2-26, physical 44 > 2.11.2 Driver Factors > Preventing drowsiness before a trip ↗

  55. Dense fog is making visibility dangerously poor, and you can safely enter a designated truck stop before continuing. Which choice follows the manual's preferred approach?

    Correct answer: Use the truck stop and wait for better visibility

    The manual prefers avoiding travel in fog and waiting in a rest area or truck stop until visibility improves. The scenario supplies a safe off-road stopping place; it does not recommend stopping in a lane or on an exposed shoulder.

    Source: New Jersey CDL Manual, March 2025 cover; Section 2, July 2017 footer, printed 2-28, physical 46 > 2.12 Driving in Fog > avoiding fog travel and waiting off the road ↗

  56. A truck's wipers fail during wintry precipitation, and the driver can no longer see well enough to continue safely. What should the driver do?

    Correct answer: Stop safely and have the visibility problem corrected

    When wiper failure or a similar problem prevents adequate vision, the manual calls for a safe stop and correction of the problem. Following another vehicle is not a substitute for seeing the road.

    Source: New Jersey CDL Manual, March 2025 cover; Section 2, July 2017 footer, printed 2-28, physical 46 > 2.13.1 Vehicle Checks > Wipers and Washers ↗

  57. A planned winter route may require tire chains. Which preparation should happen before the driver faces snow and ice along the route?

    Correct answer: Check fit and condition, and learn installation beforehand

    The manual calls for chains that fit the drive tires, checks for damaged components, and learning how to install them before they are needed. This does not state a jurisdiction's chain requirements or a mounting procedure.

    Source: New Jersey CDL Manual, March 2025 cover; Section 2, July 2017 footer, printed 2-28, physical 46 > 2.13.1 Vehicle Checks > Tire Chains ↗

  58. In freezing conditions, the roadway looks wet, but nearby vehicles have stopped throwing up spray. What should that observation suggest?

    Correct answer: The surface may have frozen into ice

    A lack of spray can indicate that water on the road has frozen. It is a warning to consider ice, not proof that the surface is dry or that traction has improved.

    Source: New Jersey CDL Manual, March 2025 cover; Section 2, July 2017 footer, printed 2-29, physical 47 > 2.13.2 Driving > Check for Ice ↗

  59. After heavy rain has wetted a truck's brakes, why should the driver be alert for more than simply a longer stop?

    Correct answer: Wet brakes can also grab or apply unevenly

    Water in the brakes can cause weakness, uneven application, or grabbing, with possible pulling or wheel lockup. This question identifies the hazard; it does not instruct the driver to enter water or provide a drying maneuver.

    Source: New Jersey CDL Manual, March 2025 cover; Section 2, July 2017 footer, printed 2-29, physical 47 > 2.13.2 Driving > Wet Brakes ↗

  60. A truck uses a winterfront over its radiator. Why should the driver avoid leaving it closed too tightly, even in cold weather?

    Correct answer: Too little cooling airflow can overheat the engine

    On a truck equipped with a winterfront or radiator shutters, excessive restriction can cause overheating. The setup must suit that vehicle and conditions; cold weather alone does not eliminate the need for cooling airflow.

    Source: New Jersey CDL Manual, March 2025 cover; Section 2, July 2017 footer, printed 2-29, physical 47 > 2.13.1 Vehicle Checks > Radiator Shutters and Winterfront ↗

  61. While driving, the coolant-temperature gauge rises above the highest safe temperature specified for this truck. What is the appropriate response?

    Correct answer: Stop as safely and promptly as possible and investigate

    An excessive coolant-temperature reading can signal a problem leading to engine failure or fire. The manual calls for stopping safely and finding the cause. This is not permission to open a hot pressurized cooling system.

    Source: New Jersey CDL Manual, March 2025 cover; Section 2, July 2017 footer, printed 2-30, physical 48 > 2.14.1 Vehicle Checks > Engine Coolant (continued from printed 2-29) ↗

  62. On a very hot day, patches of tar have risen to the road surface. What traction concern does the manual identify?

    Correct answer: Those patches can be very slippery

    The manual warns that tar bleeding to the surface in hot weather can be slippery. A lack of rain or ice does not guarantee good traction on those patches.

    Source: New Jersey CDL Manual, March 2025 cover; Section 2, July 2017 footer, printed 2-30, physical 48 > 2.14.2 Driving > Watch for Bleeding Tar ↗

  63. Before a long, steep descent, a driver plans to wait until the truck gains speed before selecting the needed lower gear. What is the concern with that plan?

    Correct answer: The lower gear may become impossible to engage

    Choose the appropriate low gear before starting down the grade. Waiting until speed builds can prevent engagement and lose engine braking; forcing an automatic transmission down at excessive speed can also damage it. This is not a full descent procedure.

    Source: New Jersey CDL Manual, March 2025 cover; Section 2, July 2017 footer, printed 2-33, physical 51 > 2.16.2 Select the Right Gear before Starting Down the Grade ↗

  64. A modern truck climbs a hill comfortably in a relatively high gear. Does that prove the same gear will provide enough control going down that hill?

    Correct answer: No; that truck may need a lower gear for descent

    Modern trucks may climb in higher gears while having less friction and aerodynamic drag to hold them back downhill. The correct descent gear depends on the actual vehicle and conditions, not a universal same-gear rule.

    Source: New Jersey CDL Manual, March 2025 cover; Section 2, July 2017 footer, printed 2-33, physical 51 > 2.16.2 Select the Right Gear before Starting Down the Grade > older and modern truck differences ↗

  65. On a long, steep downgrade with good traction, a truck is in the appropriate low gear. Why should engine braking carry much of the speed-control work?

    Correct answer: It helps preserve the service brakes for needed slowing

    Using the engine's braking effect reduces excessive work and heat at the service brakes, preserving their ability to slow or stop the truck when needed. Appropriate speed, gear, traction, and braking technique remain necessary.

    Source: New Jersey CDL Manual, March 2025 cover; Section 2, July 2017 footer, printed 2-33, physical 51 > 2.16.1 Select a Safe Speed (continued from printed 2-32) > engine braking and preserving brakes; 2.16.4 Proper Braking Technique ↗

  66. After a vehicle fire has been reported and people are clear, the driver is unsure whether the available extinguisher is suitable. What should the driver do?

    Correct answer: Stay clear and wait for the firefighters

    The manual says to wait for firefighters when unsure what to use. An unsuitable agent can make a fire more dangerous. This question gives no fire-class prescription or instruction to approach a fire.

    Source: New Jersey CDL Manual, March 2025 cover; Section 2, July 2017 footer, printed 2-39, physical 57 > 2.21.3 Fire Fighting > Use the Right Fire Extinguisher > uncertainty and waiting for firefighters ↗

  67. A box truck with a cargo fire is safely stopped, everyone is clear, and firefighters have been called. Why should the driver avoid opening the closed cargo doors to inspect the fire?

    Correct answer: Fresh oxygen can make the cargo burn much faster

    Opening the doors can supply oxygen and accelerate a cargo fire. The manual directs keeping the compartment closed. The scenario has people clear and help called; it is not an occupant-rescue or firefighting procedure.

    Source: New Jersey CDL Manual, March 2025 cover; Section 2, July 2017 footer, printed 2-39, physical 57 > 2.21.3 Fire Fighting > Keep the Fire from Spreading > cargo fire in a van or box trailer ↗

  68. A cargo vehicle has a front-end header board, sometimes called a headache rack. What movement is that structure intended to resist during an emergency stop?

    Correct answer: Cargo moving forward toward the driver

    The front-end structure is intended to block forward cargo movement and protect the driver. It must be in good condition and does not replace the load's other necessary securement.

    Source: New Jersey CDL Manual, March 2025 cover; Section 3, July 2017 footer, printed 3-3, physical 66 > 3.3.3 Header Boards ↗

  69. A load inside a closed cargo van can slide across the floor. A coworker says tie-downs matter only on open trailers. What is the sound correction?

    Correct answer: Internal cargo movement can still affect vehicle handling

    Tie-downs can be important in a closed van because shifting cargo can affect handling. Enclosing the load is not the same as securing it. This item does not prescribe a tie-down count or working-load limit.

    Source: New Jersey CDL Manual, March 2025 cover; Section 3, July 2017 footer, printed 3-2, physical 65 > 3.3.2 Cargo Tie-down > closed vans ↗

  70. While driving, you notice the cargo cover flapping loose in a mirror. Why does it deserve attention even though the cargo beneath it has not moved?

    Correct answer: It could tear loose and obstruct someone's view

    A flapping cover can tear away, expose the cargo, and block your view or another driver's. Covers need monitoring during travel as well as secure attachment before departure; inspect or correct trouble only after stopping safely.

    Source: New Jersey CDL Manual, March 2025 cover; Section 3, July 2017 footer, printed 3-3, physical 66 > 3.3.4 Covering Cargo > checking covers in mirrors ↗

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