DMV Practice LabChange state
GAGeorgia
DMV Practice LabAll tests

CDL general-knowledge questions marathon

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

Georgia CDL General Knowledge Marathon

Practice mode
Question 1 of 52
  1. 1. During a parked inspection, you find that the sidewalls of a truck's dual tires are rubbing each other. Which conclusion is safest?
  2. 2. Fresh rust streaks extend from several wheel nuts after a wheel was serviced. What should you arrange before taking the truck out?
  3. 3. A leaf in a truck's multi-leaf spring has shifted sideways and could touch a tire. The truck still sits level. How should you treat this finding?
  4. 4. An inspection finds oil on a brake's friction lining, although the lining is not worn thin. Which response is appropriate?
  5. 5. Why is a leaking exhaust connection near the cab more than a noise problem?
  6. 6. Your pre-trip check was satisfactory, but a new unusual vibration and smell develop while driving. What is the best response?
  7. 7. In a mirror you see the cargo tarp ballooning and intermittently blocking your rearward view. What should you do?
  8. 8. Before departure, you notice a heavy drink container and tools loose near the driver's footwell. What is the main reason to stow them securely?
  9. 9. Inside a long construction zone, your truck's speed gradually rises while your attention is on lane shifts. What habit helps prevent this?
  10. 10. Before entering traffic, a low-speed service-brake check makes the truck pull sharply to one side on a level, straight surface. What should you conclude?
  11. 11. A driver repeatedly jerks a truck forward when starting with a trailer attached. Why should the driver use smoother acceleration?
  12. 12. At a delivery yard, two suitable legal parking spaces are available. One lets your truck pull forward when leaving; the other will require backing into a busy aisle. Which is the safer plan?
  13. 13. You are assigned a manual-transmission truck with a different engine from the one you usually drive. How should you establish its proper shift points?
  14. 14. Before a long, steep descent in a loaded truck, which plan best preserves speed control?
  15. 15. Your truck has a driver-controlled retarder that slows the drive wheels. The road ahead is icy. What should you do with the retarder?
  16. 16. A car looks small and far away in your truck's convex spot mirror. What must you remember before judging clearance?
  17. 17. While driving, you want to monitor traffic beside the truck without losing track of the road ahead. Which mirror-check habit is best?
  18. 18. You finish a right turn in a truck whose turn signals do not cancel automatically. What should you do before continuing past the next driveway?
  19. 19. Your truck will need to slow greatly for a tight driveway turn, and a car is following. How should you help that driver anticipate your slowdown?
  20. 20. A driver behind your truck appears impatient to pass. You think the opposing lane may be clear. Should you wave the driver around?
  21. 21. Your loaded truck has a high center of gravity. A curved exit has a posted speed that nearby cars are maintaining. What is the safest judgment?
  22. 22. A driver estimates stopping room using only the distance travelled after the brakes begin slowing the truck. What important distance has been left out?
  23. 23. A car is following your truck too closely. Traffic ahead is steady, and you can safely increase your own following gap. Why is doing so helpful?
  24. 24. Gusty crosswinds are expected as your lightly loaded truck emerges from a tunnel. When traffic allows, which position gives you more room for a possible wind-driven movement?
  25. 25. Your truck's body sits higher after its load is removed. It passed beneath a low canopy when loaded earlier. What should you do before using that route again?
  26. 26. A heavily loaded, low-clearance truck must enter a yard across a deep drainage dip. The opening is wide enough. What additional concern must be checked?
  27. 27. A gap in traffic would let a small car cross a road comfortably. You are driving a long, heavily loaded truck. What should guide your decision?
  28. 28. Far ahead, a cardboard box lies in your truck's lane. You cannot tell what is inside. What is the best approach?
  29. 29. As you approach an alley in a truck, only the nose of a car is visible beyond a wall; its driver remains hidden. What should you anticipate?
  30. 30. A motorcyclist ahead repeatedly looks over a shoulder but has not signalled. What should you infer while driving your truck?
  31. 31. Before a night drive, the truck's bright interior lighting makes it harder to see outside. How should you adjust the cab lighting?
  32. 32. A truck driver keeps both hands on the wheel and looks forward but becomes absorbed in an intense conversation. Why is this still unsafe?
  33. 33. Snow and road spray cover the windshield, and your truck's wipers stop clearing it well enough to see. What should you do?
  34. 34. After a cold night, sunlit pavement has thawed, but the next bend stays shaded. What should you allow for as you approach it?
  35. 35. As you accelerate gently in a truck on a slick surface, the drive wheels begin to spin. Which accelerator response helps avoid worsening the loss of traction?
  36. 36. After a sudden heavy thump, you bring the truck to a safe off-road stop. It has dual rear tires and seemed to steer normally. Before resuming, what should be checked?
  37. 37. Your truck's brakes have failed on a steep downgrade, and a signed escape ramp is available ahead. What is the safest choice?
  38. 38. A truck has properly working ABS. A driver proposes following traffic more closely because the system will shorten every stop. What is the correct response?
  39. 39. After the normal start-up checks have finished, your truck's yellow ABS malfunction lamp comes on during the trip. What does that indicate?
  40. 40. During a hot-weather trip, the coolant-temperature gauge rises above the vehicle's highest safe range. What should you do?
  41. 41. On a slippery surface, a truck's front end continues nearly straight even though the driver has turned the steering wheel. Which loss of control does that behavior most directly indicate?
  42. 42. You are not involved in a crash but stop to offer help. A safe, lawful parking space is available away from the immediate scene. Where should you leave your truck so arriving emergency crews can work?
  43. 43. At a crash scene, a qualified emergency responder is already assisting an injured person. You have offered help and are waiting in a safe place. What is the most useful next step?
  44. 44. Before a long commercial trip, a driver has slept poorly on several nights and already feels tired. The departure can be rescheduled. Which plan best addresses the problem before driving begins?
  45. 45. Two lawful schedules are available for a long trip, with adequate rest time under either plan. One places most driving during the driver's usual waking hours; the other places it during the driver's usual sleeping hours. Which choice better supports alertness?
  46. 46. An adequately rested driver is planning a long route with several safe stopping places. Which approach to breaks is most consistent with staying alert throughout the trip?
  47. 47. After a monotonous stretch, a truck driver realizes that the last several miles are difficult to remember, even though the driver does not recall closing their eyes. How should that observation be treated?
  48. 48. A sleepy driver opens a window and turns up the radio. The driver briefly feels more awake, but a safe rest area is available now. Which decision best addresses the underlying problem?
  49. 49. While parked before a trip, a driver checks a newly purchased nonprescription medicine and finds a warning about drowsiness and driving. What is the safest way to decide whether it can be used while working?
  50. 50. During a medication review, a driver learns that a medicine carries a warning against combining it with alcohol. Why is that warning important to the driver's fitness to operate a truck?
  51. 51. A driver repeatedly feels unusually sleepy during the day despite allowing what seems to be enough time for sleep. The driver is safely parked and is not about to depart. What should the driver arrange to address the recurring problem?
  52. 52. A truck driver operating under the federal motor carrier safety rules is safely parked when illness makes driving unsafe. Remaining parked creates no emergency hazard, but a delivery deadline is approaching. What should happen?
Review all 52 questions with answers

  1. During a parked inspection, you find that the sidewalls of a truck's dual tires are rubbing each other. Which conclusion is safest?

    Correct answer: The contact is a tire defect that needs correction before the trip

    Dual tires should not rub each other or vehicle parts. Treat the contact as a defect; visible tread and apparently normal handling do not make it safe.

    Source: Georgia DDS Commercial Driver's Study Guide, 2023–2024 cover, current linked PDF modified June 16, 2025; Section 2 Driving Safety, printed/physical 17; 2.1.3 What to Look For — Tire Problems; also p20 Right Rear. ↗

  2. Fresh rust streaks extend from several wheel nuts after a wheel was serviced. What should you arrange before taking the truck out?

    Correct answer: A check of wheel-nut tightness using the proper vehicle procedure

    Rust around wheel nuts can indicate looseness. The fastening needs to be checked; the fact that the nuts are present is not enough. Use the proper procedure rather than guessing a tightening force.

    Source: Georgia DDS Commercial Driver's Study Guide, 2023–2024 cover, current linked PDF modified June 16, 2025; Section 2 Driving Safety, printed/physical 17; 2.1.3 Wheel and Rim Problems, continuing p18; p19 Left Front Side. ↗

  3. A leaf in a truck's multi-leaf spring has shifted sideways and could touch a tire. The truck still sits level. How should you treat this finding?

    Correct answer: As a dangerous suspension defect even though the truck is level

    A shifted spring leaf that could strike a tire or another part is a listed suspension defect. A level-looking vehicle does not establish that the suspension is safe.

    Source: Georgia DDS Commercial Driver's Study Guide, 2023–2024 cover, current linked PDF modified June 16, 2025; Section 2 Driving Safety, printed/physical 18; 2.1.3 Suspension System Defects; Figures 2.2–2.3. ↗

  4. An inspection finds oil on a brake's friction lining, although the lining is not worn thin. Which response is appropriate?

    Correct answer: Have the contamination and its cause corrected before operation

    Oil, grease or brake fluid on brake shoes or pads is a defect. Sufficient lining thickness does not cancel contamination, and driving to burn it away is not a safe repair.

    Source: Georgia DDS Commercial Driver's Study Guide, 2023–2024 cover, current linked PDF modified June 16, 2025; Section 2 Driving Safety, printed/physical 18; 2.1.3 Bad Brake Drums or Shoes. ↗

  5. Why is a leaking exhaust connection near the cab more than a noise problem?

    Correct answer: It may let poisonous exhaust gases enter the cab or sleeper

    A damaged or leaking exhaust system can let poisonous fumes into occupied areas. Treat the leak as a safety problem; opening a window is not a substitute for correcting it.

    Source: Georgia DDS Commercial Driver's Study Guide, 2023–2024 cover, current linked PDF modified June 16, 2025; Section 2 Driving Safety, printed/physical 18; 2.1.3 Exhaust System Defects; also p32 2.13.1 Exhaust System Defects. ↗

  6. Your pre-trip check was satisfactory, but a new unusual vibration and smell develop while driving. What is the best response?

    Correct answer: Find a safe place to stop and investigate the signs of trouble

    Inspection continues during a trip. Unusual sights, sounds, smells or feel can warn of a developing problem even when there is no dashboard warning.

    Source: Georgia DDS Commercial Driver's Study Guide, 2023–2024 cover, current linked PDF modified June 16, 2025; Section 2 Driving Safety, printed/physical 21; 2.1.6 Inspection During a Trip — Check Vehicle Operation Regularly. ↗

  7. In a mirror you see the cargo tarp ballooning and intermittently blocking your rearward view. What should you do?

    Correct answer: Stop in a safe place and have the cover secured properly

    Mirrors can reveal a loose or ballooning tarp. A cargo cover must be secured so it does not billow or obstruct mirrors; changing mirror use does not fix the cover.

    Source: Georgia DDS Commercial Driver's Study Guide, 2023–2024 cover, current linked PDF modified June 16, 2025; Section 2 Driving Safety, printed/physical 23; 2.4.2 Seeing to the Sides and Rear — Check Your Vehicle; also p20 Cargo securement. ↗

  8. Before departure, you notice a heavy drink container and tools loose near the driver's footwell. What is the main reason to stow them securely?

    Correct answer: They can interfere with the controls or strike someone in a crash

    Loose cab items can reach the controls and can become injury hazards in a crash. Secure them before moving, even if you are the only occupant.

    Source: Georgia DDS Commercial Driver's Study Guide, 2023–2024 cover, current linked PDF modified June 16, 2025; Section 2 Driving Safety, printed/physical 20; 2.1.5 Step 6 — Get In Vehicle, secure loose articles. ↗

  9. Inside a long construction zone, your truck's speed gradually rises while your attention is on lane shifts. What habit helps prevent this?

    Correct answer: Check the speedometer and keep adjusting speed to the work-zone conditions

    In a long work zone, speed can creep up unnoticed. Monitor the speedometer as well as the road, and keep speed appropriate to posted restrictions, surfaces, weather and nearby workers.

    Source: Georgia DDS Commercial Driver's Study Guide, 2023–2024 cover, current linked PDF modified June 16, 2025; Section 2 Driving Safety, printed/physical 26; 2.6.7 Roadway Work Zones. ↗

  10. Before entering traffic, a low-speed service-brake check makes the truck pull sharply to one side on a level, straight surface. What should you conclude?

    Correct answer: The vehicle may have brake trouble that needs correction before the trip

    Pulling to one side, an unusual pedal feel or delayed stopping can signal brake trouble. Investigate and correct an unsafe condition before driving; compensating with the steering wheel is not a repair.

    Source: Georgia DDS Commercial Driver's Study Guide, 2023–2024 cover, current linked PDF modified June 16, 2025; Section 2 Driving Safety, printed/physical 20; 2.1.5 Step 7 — Test Service Brake Stopping Action; p21 unsafe-defect conclusion. ↗

  11. A driver repeatedly jerks a truck forward when starting with a trailer attached. Why should the driver use smoother acceleration?

    Correct answer: Rough acceleration can damage the vehicle or trailer coupling

    Build speed smoothly and gradually. Rough starts can cause mechanical damage, and when towing they can also damage the coupling. Secured cargo does not remove those risks.

    Source: Georgia DDS Commercial Driver's Study Guide, 2023–2024 cover, current linked PDF modified June 16, 2025; Section 2 Driving Safety, printed/physical 21; 2.2.1 Accelerating. ↗

  12. At a delivery yard, two suitable legal parking spaces are available. One lets your truck pull forward when leaving; the other will require backing into a busy aisle. Which is the safer plan?

    Correct answer: Choose the space that permits a forward departure

    Avoid unnecessary backing. When possible, park so you can pull forward on departure; mirrors do not let you see everything behind a large vehicle.

    Source: Georgia DDS Commercial Driver's Study Guide, 2023–2024 cover, current linked PDF modified June 16, 2025; Section 2 Driving Safety, printed/physical 21; 2.2.4 Backing Safely — opening paragraph. ↗

  13. You are assigned a manual-transmission truck with a different engine from the one you usually drive. How should you establish its proper shift points?

    Correct answer: Learn this vehicle's operating range and gear speeds from its instructions

    Learn the operating rpm range and road speeds appropriate to each gear for the vehicle you will drive. Engines and shift strategies differ; familiar numbers from another truck are not a universal rule.

    Source: Georgia DDS Commercial Driver's Study Guide, 2023–2024 cover, current linked PDF modified June 16, 2025; Section 2 Driving Safety, printed/physical 22; 2.3.1 Manual Transmissions — Knowing When to Shift Up. ↗

  14. Before a long, steep descent in a loaded truck, which plan best preserves speed control?

    Correct answer: Select a suitable low gear and safe speed before starting down

    Choose the safe speed and suitable low gear before the descent, considering the truck, load, grade and conditions. Waiting until speed builds can leave you unable to obtain the needed gear and engine braking.

    Source: Georgia DDS Commercial Driver's Study Guide, 2023–2024 cover, current linked PDF modified June 16, 2025; Section 2 Driving Safety, printed/physical 34; 2.16.1 Select a Safe Speed; 2.16.2 Select the Right Gear Before Starting Down the Grade. ↗

  15. Your truck has a driver-controlled retarder that slows the drive wheels. The road ahead is icy. What should you do with the retarder?

    Correct answer: Turn it off to avoid adding a drive-wheel skid risk

    The DDS guide cautions that a retarder can make drive wheels skid when traction is poor. Turn it off for icy conditions and use speed and control inputs appropriate to the road.

    Source: Georgia DDS Commercial Driver's Study Guide, 2023–2024 cover, current linked PDF modified June 16, 2025; Section 2 Driving Safety, printed/physical 22; 2.3.4 Retarders — Caution; also p32 2.13.2 Adjust Turning and Braking to Conditions. ↗

  16. A car looks small and far away in your truck's convex spot mirror. What must you remember before judging clearance?

    Correct answer: The mirror can make the car seem farther away than it really is

    Convex mirrors show a wider area but make objects look smaller and farther away. Allow for that distortion instead of treating the apparent gap as an accurate distance measurement.

    Source: Georgia DDS Commercial Driver's Study Guide, 2023–2024 cover, current linked PDF modified June 16, 2025; Section 2 Driving Safety, printed/physical 23; 2.4.2 How to Use Mirrors; Figure 2.7. ↗

  17. While driving, you want to monitor traffic beside the truck without losing track of the road ahead. Which mirror-check habit is best?

    Correct answer: Use brief checks and return your attention to the roadway ahead

    Check mirrors regularly but quickly, shifting attention back to the road ahead. Long mirror stares let the vehicle travel a substantial distance without monitoring developing hazards in front.

    Source: Georgia DDS Commercial Driver's Study Guide, 2023–2024 cover, current linked PDF modified June 16, 2025; Section 2 Driving Safety, printed/physical 23; 2.4.2 How to Use Mirrors. ↗

  18. You finish a right turn in a truck whose turn signals do not cancel automatically. What should you do before continuing past the next driveway?

    Correct answer: Cancel the right signal once the turn is complete

    Signal through the turn, then cancel it after completion. A signal left on can mislead another road user about what you intend to do next.

    Source: Georgia DDS Commercial Driver's Study Guide, 2023–2024 cover, current linked PDF modified June 16, 2025; Section 2 Driving Safety, printed/physical 23; 2.5.1 Signal Your Intentions — Turns. ↗

  19. Your truck will need to slow greatly for a tight driveway turn, and a car is following. How should you help that driver anticipate your slowdown?

    Correct answer: Signal early and brake early enough to slow gradually

    Car drivers may not realize how slowly a large vehicle must turn. Give advance warning of your intention and reduce speed gradually, rather than surprising following traffic with a sudden slowdown.

    Source: Georgia DDS Commercial Driver's Study Guide, 2023–2024 cover, current linked PDF modified June 16, 2025; Section 2 Driving Safety, printed/physical 23; 2.5.1 Signal Your Intentions — Slowing Down, Tight Turns. ↗

  20. A driver behind your truck appears impatient to pass. You think the opposing lane may be clear. Should you wave the driver around?

    Correct answer: No; do not signal that it is safe for someone else to pass

    Do not direct another driver to pass. Your signal can be misunderstood or based on incomplete information. Continue predictable, safe driving without authorizing or obstructing the other driver's maneuver.

    Source: Georgia DDS Commercial Driver's Study Guide, 2023–2024 cover, current linked PDF modified June 16, 2025; Section 2 Driving Safety, printed/physical 23; 2.5.1 Signal Your Intentions — Don't Direct Traffic. ↗

  21. Your loaded truck has a high center of gravity. A curved exit has a posted speed that nearby cars are maintaining. What is the safest judgment?

    Correct answer: The truck may need a lower speed before entering the curve

    A high-center-of-gravity truck can roll over in a curve even when its tires retain traction. A posted speed or the speed of cars is not a guarantee that the curve is safe for your truck and load.

    Source: Georgia DDS Commercial Driver's Study Guide, 2023–2024 cover, current linked PDF modified June 16, 2025; Section 2 Driving Safety, printed/physical 25; 2.6.3 Speed and Curves; also p28 2.8.2 Off Ramps/On Ramps. ↗

  22. A driver estimates stopping room using only the distance travelled after the brakes begin slowing the truck. What important distance has been left out?

    Correct answer: The distance travelled while recognizing the hazard and reacting

    Stopping room must allow for perception and reaction as well as braking. The truck continues moving while the driver recognizes a hazard and begins the response. Exact distances vary with the situation.

    Source: Georgia DDS Commercial Driver's Study Guide, 2023–2024 cover, current linked PDF modified June 16, 2025; Section 2 Driving Safety, printed/physical 24; 2.6.1 Stopping Distance; continuation p25 and Figure 2.11. ↗

  23. A car is following your truck too closely. Traffic ahead is steady, and you can safely increase your own following gap. Why is doing so helpful?

    Correct answer: It gives you more room to slow gradually if traffic ahead changes

    Extra space ahead reduces the chance that you will need a sudden speed or direction change. Signal early and slow gradually; do not try to punish the tailgater or speed up to escape.

    Source: Georgia DDS Commercial Driver's Study Guide, 2023–2024 cover, current linked PDF modified June 16, 2025; Section 2 Driving Safety, printed/physical 27; 2.7.2 Space Behind — Dealing with Tailgaters Safely. ↗

  24. Gusty crosswinds are expected as your lightly loaded truck emerges from a tunnel. When traffic allows, which position gives you more room for a possible wind-driven movement?

    Correct answer: Avoid remaining directly alongside another vehicle

    Strong winds can make lane keeping harder, especially for lighter vehicles and when leaving a tunnel. Avoid unnecessary side-by-side travel so there is more clearance if either vehicle moves.

    Source: Georgia DDS Commercial Driver's Study Guide, 2023–2024 cover, current linked PDF modified June 16, 2025; Section 2 Driving Safety, printed/physical 27; 2.7.3 Space to the Sides — Traveling Next to Others and Strong Winds. ↗

  25. Your truck's body sits higher after its load is removed. It passed beneath a low canopy when loaded earlier. What should you do before using that route again?

    Correct answer: Reassess the overhead clearance for the truck's present height

    Do not assume a previously used overhead clearance is still sufficient. Where unloading raises the vehicle, its present height must be considered; the earlier loaded passage is not proof of clearance.

    Source: Georgia DDS Commercial Driver's Study Guide, 2023–2024 cover, current linked PDF modified June 16, 2025; Section 2 Driving Safety, printed/physical 27; 2.7.4 Space Overhead. ↗

  26. A heavily loaded, low-clearance truck must enter a yard across a deep drainage dip. The opening is wide enough. What additional concern must be checked?

    Correct answer: Whether the underside or the ends could drag or become hung up

    Width is only one part of clearance. A loaded vehicle can have little space underneath, and drainage channels can make its ends drag. Do not take a chance on becoming hung up.

    Source: Georgia DDS Commercial Driver's Study Guide, 2023–2024 cover, current linked PDF modified June 16, 2025; Section 2 Driving Safety, printed/physical 27; 2.7.5 Space Below. ↗

  27. A gap in traffic would let a small car cross a road comfortably. You are driving a long, heavily loaded truck. What should guide your decision?

    Correct answer: Allow for your slower acceleration and clearing the entire truck

    A large loaded vehicle may need a much larger gap than a car. Consider its acceleration and total length, and ensure it can get completely across before approaching traffic reaches it.

    Source: Georgia DDS Commercial Driver's Study Guide, 2023–2024 cover, current linked PDF modified June 16, 2025; Section 2 Driving Safety, printed/physical 27; 2.7.7 Space Needed to Cross or Enter Traffic. ↗

  28. Far ahead, a cardboard box lies in your truck's lane. You cannot tell what is inside. What is the best approach?

    Correct answer: Treat it as a possible solid obstacle and plan a safe response early

    A harmless-looking box may contain heavy or solid material. Detect it early so you have time to slow or choose a clear path without an abrupt, unsafe maneuver.

    Source: Georgia DDS Commercial Driver's Study Guide, 2023–2024 cover, current linked PDF modified June 16, 2025; Section 2 Driving Safety, printed/physical 28; 2.8.2 Hazardous Roads — Foreign Objects. ↗

  29. As you approach an alley in a truck, only the nose of a car is visible beyond a wall; its driver remains hidden. What should you anticipate?

    Correct answer: The driver may enter without seeing you, so be ready to stop

    When a wall hides the other driver from you, that driver's view of approaching traffic may also be blocked. Treat the car as a developing hazard rather than assuming you have been seen.

    Source: Georgia DDS Commercial Driver's Study Guide, 2023–2024 cover, current linked PDF modified June 16, 2025; Section 2 Driving Safety, printed/physical 28; 2.8.3 Drivers Who Are Hazards — Blocked Vision. ↗

  30. A motorcyclist ahead repeatedly looks over a shoulder but has not signalled. What should you infer while driving your truck?

    Correct answer: The rider may be preparing to move; watch and preserve response space

    A head or shoulder check can be a clue to an intended turn or lane change, even without a signal. It is a reason to anticipate a possible move, not proof of a particular maneuver or an instruction to you.

    Source: Georgia DDS Commercial Driver's Study Guide, 2023–2024 cover, current linked PDF modified June 16, 2025; Section 2 Driving Safety, printed/physical 29; 2.8.3 Driver Body Movement as a Clue; 2.8.4 Always Have a Plan. ↗

  31. Before a night drive, the truck's bright interior lighting makes it harder to see outside. How should you adjust the cab lighting?

    Correct answer: Reduce interior glare while keeping the gauges readable

    Keep the cab from becoming too bright at night. Reduce unnecessary interior light and adjust instrument brightness low enough to help outside vision while still allowing you to read the gauges.

    Source: Georgia DDS Commercial Driver's Study Guide, 2023–2024 cover, current linked PDF modified June 16, 2025; Section 2 Driving Safety, printed/physical 31; 2.11.5 Night Driving Procedures — Use High Beams When You Can, cab-lighting paragraph. ↗

  32. A truck driver keeps both hands on the wheel and looks forward but becomes absorbed in an intense conversation. Why is this still unsafe?

    Correct answer: Attention can leave the driving task even while the eyes face the road

    Mental distraction can keep you from recognizing what you are looking at. Avoid complex or emotionally intense conversations that compete with the attention needed for driving.

    Source: Georgia DDS Commercial Driver's Study Guide, 2023–2024 cover, current linked PDF modified June 16, 2025; Section 2 Driving Safety, printed/physical 29; 2.9 Distracted Driving; 2.9.1 Don't Drive Distracted. ↗

  33. Snow and road spray cover the windshield, and your truck's wipers stop clearing it well enough to see. What should you do?

    Correct answer: Stop safely and have the visibility problem corrected

    If failed wipers leave you unable to see adequately, stop safely and fix the problem. Mirrors and another vehicle's lights cannot replace a clear forward view.

    Source: Georgia DDS Commercial Driver's Study Guide, 2023–2024 cover, current linked PDF modified June 16, 2025; Section 2 Driving Safety, printed/physical 32; 2.13.1 Vehicle Checks — Wipers and Washers. ↗

  34. After a cold night, sunlit pavement has thawed, but the next bend stays shaded. What should you allow for as you approach it?

    Correct answer: Ice may remain in the shade even though nearby open pavement has thawed

    Shaded road sections may remain icy and slippery after exposed areas have melted. Assess the shaded section separately and approach with speed appropriate to possible reduced traction.

    Source: Georgia DDS Commercial Driver's Study Guide, 2023–2024 cover, current linked PDF modified June 16, 2025; Section 2 Driving Safety, printed/physical 25; 2.6.2 Matching Speed to the Road Surface — Identifying Slippery Surfaces, Shaded Areas. ↗

  35. As you accelerate gently in a truck on a slick surface, the drive wheels begin to spin. Which accelerator response helps avoid worsening the loss of traction?

    Correct answer: Ease off the accelerator instead of adding more power

    Too much drive-wheel power for the available grip can cause wheelspin. Reduce the accelerator input rather than feeding the spin. This is an acceleration-traction question, not a braking-skid procedure.

    Source: Georgia DDS Commercial Driver's Study Guide, 2023–2024 cover, current linked PDF modified June 16, 2025; Section 2 Driving Safety, printed/physical 21; 2.2.1 Accelerating — poor traction; also p36 2.19 Over-acceleration. ↗

  36. After a sudden heavy thump, you bring the truck to a safe off-road stop. It has dual rear tires and seemed to steer normally. Before resuming, what should be checked?

    Correct answer: All tires, including the inner and outer duals, from a safe position

    A failed dual tire may not produce an obvious handling change. After a suspected failure and a safe stop, check all tires rather than treating normal steering as proof that they are sound.

    Source: Georgia DDS Commercial Driver's Study Guide, 2023–2024 cover, current linked PDF modified June 16, 2025; Section 2 Driving Safety, printed/physical 36; 2.17.4 Tire Failure — Respond to Tire Failure, Check the Tires; context begins p35. ↗

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

    Correct answer: Use the escape ramp rather than pass it hoping the brakes recover

    Use an available escape ramp after brake failure on a downgrade. Delay lets speed build and makes stopping harder. The ramp is intended for runaway vehicles, not only for a particular brake-system type.

    Source: Georgia DDS Commercial Driver's Study Guide, 2023–2024 cover, current linked PDF modified June 16, 2025; Section 2 Driving Safety, printed/physical 35; 2.17.3 Brake Failure — Brake Failure on Downgrades; also p34 2.16.4 escape-ramp paragraphs. ↗

  38. A truck has properly working ABS. A driver proposes following traffic more closely because the system will shorten every stop. What is the correct response?

    Correct answer: Reject the idea: ABS helps control but does not guarantee a shorter stop

    ABS helps prevent brake-induced wheel lock and maintain control. It does not necessarily shorten stopping distance and is not permission to reduce a safe following gap.

    Source: Georgia DDS Commercial Driver's Study Guide, 2023–2024 cover, current linked PDF modified June 16, 2025; Section 2 Driving Safety, printed/physical 36; 2.18 ABS opening; 2.18.4 How ABS Helps You; 2.18.8 Safety Reminders. ↗

  39. After the normal start-up checks have finished, your truck's yellow ABS malfunction lamp comes on during the trip. What does that indicate?

    Correct answer: ABS control may be lost on one or more wheels and needs attention

    A malfunction lamp that comes on while underway warns of a possible ABS fault, not normal ABS operation. Normal brake functions may remain, but do not assume antilock protection is available; report the fault and have the system checked promptly.

    Source: Georgia DDS Commercial Driver's Study Guide, 2023–2024 cover, current linked PDF modified June 16, 2025; Section 2 Driving Safety, printed/physical 36; 2.18.3 How to Know If Your Vehicle Is Equipped with ABS; 2.18.7 Braking If ABS Is Not Working. ↗

  40. During a hot-weather trip, the coolant-temperature gauge rises above the vehicle's highest safe range. What should you do?

    Correct answer: Stop driving as soon as safely possible and have the overheating checked

    A temperature above the safe range can indicate a problem that may lead to engine failure. Stop as soon as safely possible and investigate through safe, vehicle-appropriate procedures; this is not an instruction to open a hot cooling system.

    Source: Georgia DDS Commercial Driver's Study Guide, 2023–2024 cover, current linked PDF modified June 16, 2025; Section 2 Driving Safety, printed/physical 32; 2.14.1 Vehicle Checks — Engine Coolant. ↗

  41. On a slippery surface, a truck's front end continues nearly straight even though the driver has turned the steering wheel. Which loss of control does that behavior most directly indicate?

    Correct answer: The front tires have lost the traction needed to follow the steering direction

    In a front-wheel skid, the front end tends to continue straight despite steering input. This question identifies the symptom; it does not prescribe a skid-recovery maneuver or establish which mechanical or surface condition caused it.

    Source: Georgia DDS Commercial Driver's Study Guide, 2023–2024 cover, current linked PDF modified June 16, 2025; Section 2 Driving Safety, printed/physical 37; 2.19.3 Front-wheel Skids. Symptom recognition only; recovery instructions not used. ↗

  42. You are not involved in a crash but stop to offer help. A safe, lawful parking space is available away from the immediate scene. Where should you leave your truck so arriving emergency crews can work?

    Correct answer: In the safe space away from the immediate scene, leaving access for emergency vehicles

    A driver stopping to help should park away from the immediate crash area because emergency vehicles need access. This scenario assumes a safe, lawful parking space; it does not instruct an involved driver to move a wreck or deploy equipment into traffic.

    Source: Georgia DDS Commercial Driver's Study Guide, 2023–2024 cover, current linked PDF modified June 16, 2025; Section 2 Driving Safety, printed/physical 37; 2.20.1 Protect the Area — stopping to help. ↗

  43. At a crash scene, a qualified emergency responder is already assisting an injured person. You have offered help and are waiting in a safe place. What is the most useful next step?

    Correct answer: Stay clear of the responder's work unless asked to help, and follow any instructions given

    When a qualified person is already helping, the manual directs other helpers to stay out of the way unless asked to assist. The decision is about cooperation and keeping the work area clear, not providing medical treatment.

    Source: Georgia DDS Commercial Driver's Study Guide, 2023–2024 cover, current linked PDF modified June 16, 2025; Section 2 Driving Safety, printed/physical 37; 2.20.3 Care for the Injured — opening qualified-person condition only. No first-aid procedure used. ↗

  44. Before a long commercial trip, a driver has slept poorly on several nights and already feels tired. The departure can be rescheduled. Which plan best addresses the problem before driving begins?

    Correct answer: Reschedule departure to allow adequate sleep before starting the trip

    Starting a long trip already tired is dangerous. Lost sleep is not repaired by willpower or by a promise to sleep after the trip; the driver needs adequate sleep before departure. No fixed sleep duration or guarantee of fitness is implied.

    Source: Georgia DDS Commercial Driver's Study Guide, 2023–2024 cover, current linked PDF modified June 16, 2025; Section 2 Driving Safety, printed/physical 40; 2.23.1 Be Ready to Drive — Get Enough Sleep. Nonnumeric planning principle; corroborated by FMCSA CMV Driving Tips — Driver Fatigue, Tip 1. ↗

  45. Two lawful schedules are available for a long trip, with adequate rest time under either plan. One places most driving during the driver's usual waking hours; the other places it during the driver's usual sleeping hours. Which choice better supports alertness?

    Correct answer: Prefer the usual waking hours, because the body's normal sleep pattern affects alertness

    When feasible, the manual recommends scheduling trips during hours the driver is normally awake. A lawful schedule, light traffic or a bright cab does not eliminate the effect of the body's normal sleep pattern. This is not a numerical hours-of-service rule.

    Source: Georgia DDS Commercial Driver's Study Guide, 2023–2024 cover, current linked PDF modified June 16, 2025; Section 2 Driving Safety, printed/physical 40; 2.23.1 Be Ready to Drive — Schedule Trips Safely. No fixed clock-time window used; corroborated by FMCSA CMV Driving Tips — Driver Fatigue, Tip 1. ↗

  46. An adequately rested driver is planning a long route with several safe stopping places. Which approach to breaks is most consistent with staying alert throughout the trip?

    Correct answer: Build in breaks before becoming very tired, while recognizing that breaks do not replace needed sleep

    Plan breaks before pronounced drowsiness or fatigue develops. A break schedule is not a substitute for adequate sleep, and the driver must respond to sleepiness even if it occurs before a planned stop. No required break count or interval is being tested.

    Source: Georgia DDS Commercial Driver's Study Guide, 2023–2024 cover, current linked PDF modified June 16, 2025; Section 2 Driving Safety, printed/physical 40; 2.23.2 While You Are Driving — Take Breaks; 2.23.1 Get Enough Sleep and physical 41, 2.23.3 Stop to Sleep. No numeric or fixed-time schedule used. ↗

  47. After a monotonous stretch, a truck driver realizes that the last several miles are difficult to remember, even though the driver does not recall closing their eyes. How should that observation be treated?

    Correct answer: As a danger signal of drowsy driving that requires a safe stop and rest

    Not remembering the last few miles is one of the manual's warning signs of drowsy driving. A driver may be in danger of falling asleep without recognizing it. Lack of a remembered eye closure or a crash does not make the warning harmless.

    Source: Georgia DDS Commercial Driver's Study Guide, 2023–2024 cover, current linked PDF modified June 16, 2025; Section 2 Driving Safety, printed/physical 41; continuation of 2.23.2 Recognize the Danger Signals of Drowsy Driving, beginning physical 40. No microsleep duration or distance calculation used. ↗

  48. A sleepy driver opens a window and turns up the radio. The driver briefly feels more awake, but a safe rest area is available now. Which decision best addresses the underlying problem?

    Correct answer: Stop safely at the rest area and obtain needed sleep instead of relying on the brief stimulation

    An open window or radio is not a dependable remedy for sleepiness. The manual calls for a safe stop and sleep rather than pushing on. A short-lived sensation of being more awake does not establish that the driver is fit to continue.

    Source: Georgia DDS Commercial Driver's Study Guide, 2023–2024 cover, current linked PDF modified June 16, 2025; Section 2 Driving Safety, printed/physical 41; 2.23.3 When You Do Become Sleepy — Stop to Sleep and Do Not. Controls interpretation of physical 40's Keep Cool paragraph; corroborated by FMCSA CMV Driving Tips — Driver Fatigue, Tip 6. ↗

  49. While parked before a trip, a driver checks a newly purchased nonprescription medicine and finds a warning about drowsiness and driving. What is the safest way to decide whether it can be used while working?

    Correct answer: Read and follow the warnings and get advice from a pharmacist or clinician before driving if the effects are uncertain

    Nonprescription status does not guarantee that a medicine is safe for driving. Follow its warnings and seek professional advice about uncertain effects before driving. This does not mean that all medicines are prohibited or that prescribed treatment should be stopped without advice.

    Source: Georgia DDS Commercial Driver's Study Guide, 2023–2024 cover, current linked PDF modified June 16, 2025; Section 2 Driving Safety, printed/physical 40; 2.22.2 Other Drugs — possible driving effects and warning labels only. Current corroboration: FDA, Some Medicines and Driving Don't Mix, How Can You Avoid Driving Impaired? Broad medication-avoidance and legal-permission shorthand not used. ↗

  50. During a medication review, a driver learns that a medicine carries a warning against combining it with alcohol. Why is that warning important to the driver's fitness to operate a truck?

    Correct answer: Alcohol can worsen the medicine's impairing effects, making the combination more dangerous for driving

    Alcohol can make the effects of other drugs worse. A medicine's alcohol-interaction warning must not be treated as permission to drive after combining them. This item does not establish a legal alcohol limit, a waiting period or an individual medication regimen.

    Source: Georgia DDS Commercial Driver's Study Guide, 2023–2024 cover, current linked PDF modified June 16, 2025; Section 2 Driving Safety, printed/physical 40; 2.22.2 Other Drugs — alcohol can worsen other drug effects. Current corroboration: FDA, Some Medicines and Driving Don't Mix, medicine/alcohol interaction warnings. No BAC, dose or timing claim used. ↗

  51. A driver repeatedly feels unusually sleepy during the day despite allowing what seems to be enough time for sleep. The driver is safely parked and is not about to depart. What should the driver arrange to address the recurring problem?

    Correct answer: A discussion with a healthcare professional about the recurring sleepiness

    Frequent daytime sleepiness warrants discussion with a healthcare professional. The symptom can have different causes; this question neither diagnoses a sleep disorder nor decides medical certification. Any current impairment must also be addressed before driving.

    Source: Georgia DDS Commercial Driver's Study Guide, 2023–2024 cover, current linked PDF modified June 16, 2025; Section 2 Driving Safety, printed/physical 40; 2.23.1 Be Ready to Drive — Visit Your Doctor, sleep-related consultation paragraph only. Corroborated by FMCSA, How Is Your Sleep? No diagnosis or medical-qualification rule used. ↗

  52. A truck driver operating under the federal motor carrier safety rules is safely parked when illness makes driving unsafe. Remaining parked creates no emergency hazard, but a delivery deadline is approaching. What should happen?

    Correct answer: The driver must not begin driving while the illness makes operation unsafe

    A driver must not begin or continue operating when illness makes it unsafe, and a carrier must not require or permit that operation. A delivery deadline is not the narrow grave-emergency exception in 49 CFR 392.3. The scenario expressly removes that exception by placing the driver somewhere safe.

    Source: Georgia DDS Commercial Driver's Study Guide, 2023–2024 cover, current linked PDF modified June 16, 2025; Section 2 Driving Safety, printed/physical 41; 2.23.4 Illness. Current controlling corroboration: 49 CFR 392.3, complete body including grave-emergency exception, eCFR Title 49 current through September 10, 2026. Federal-rule scope and safe-location condition explicit. ↗

Report a problem with this question

Question reference: ga-cdl-general-001

Opens a draft in your email app. Review and send it there; nothing is sent automatically.

Draft a correction email

Contact details & help

Study tools & test information

Home / Georgia / CDL

CDL general-knowledge questions marathon

All 52 general-knowledge questions in one session. These are the same records used in the numbered sets, not additional questions or complete CDL preparation.

All topics and study tools