Carga — examen de práctica 2026

IncorrectoRespuesta correcta: C — The driver, who must spot an overload or a badly distributed load even when other hands did the loading

The rules attach the duty to the person who takes the vehicle onto the road, because that is who will have to control it. Who physically stacked the freight changes nothing about who answers for it.

The belief that having someone else load and sign for the freight transfers the legal responsibility for weight and securement away from the driver.

IncorrectoRespuesta correcta: C — Heaviest crates on the bottom with the lighter ones above them

Keeping the mass low keeps the center of gravity low, and a low center of gravity is what resists the vehicle rolling over when the trailer leans in a curve or a swerve.

The belief that heavy cargo on top holds the load down, when in fact it lifts the center of gravity and makes tipping easier.

IncorrectoRespuesta correcta: A — The most that one vehicle, cargo included, is built and rated to weigh

GVWR is a ceiling set by the manufacturer for one loaded vehicle, so it never moves. The scale reading is the actual gross weight and can sit anywhere below that ceiling, which is why the two numbers rarely match.

The belief that GVWR is a measurement that rises and falls with the load, rather than a fixed manufacturer's rating you must stay under.

IncorrectoRespuesta correcta: C — The suspension system and the coupling device

Suspensions are rated for the weight they can carry and couplings for the weight they can pull or carry. Both sit directly in the load path, so either one can be overloaded on a truck whose gross and axle weights are perfectly legal.

Assuming that clearing the gross and axle limits proves every load-bearing part of the vehicle is within its own rating.

IncorrectoRespuesta correcta: A — Not enough of the load is sitting over the drive axles

Traction comes from weight pressing the drive tires into the road surface. Take that weight away and the tires break loose easily, and bad weather is exactly the condition that turns a light drive axle into a stuck truck.

Believing traction is purely a matter of tread and road surface, and that how the load is distributed has nothing to do with wheels spinning.

IncorrectoRespuesta correcta: C — So little weight is left on the front axle that the steer tires can no longer hold the vehicle on course

Moving weight rearward lifts load off the front axle, and steering only works while the steer tires are pressed firmly against the road. Once that pressure drops, the front end stops responding the way the driver expects.

The belief that a light front end is harmless or even an improvement because the steering wheel feels easier to turn.

IncorrectoRespuesta correcta: A — A cover working loose in the wind can be torn away, leaving the freight exposed and possibly blinding you or the driver behind you

A cover only does its job while it is still attached. Once it begins working loose, wind can rip it free, which both exposes the load to spill and can put fabric across your windshield or the vehicle behind you.

Treating tarping as a task finished at the loading dock, so nobody looks at the cover again until the delivery.

IncorrectoRespuesta correcta: B — Add up what the tractor and everything it tows are rated at, or actually weigh, and use whichever pairing gives the biggest total

The rating is meant to describe what the whole combination is built to handle, so when the manufacturer prints no single number the fallback is arithmetic: total the tractor and trailer figures, and the largest total you can form is the one that counts.

Assuming that a combination with no printed GCWR simply has no combination rating, so only the tractor's GVWR matters.

IncorrectoRespuesta correcta: B — Too much of the cargo weight is riding on the steering axle

Extra weight over the front presses the steer tires hard into the road, so the driver has to fight the wheel to turn them, and the same pressure grinds the tires and punishes the axle itself.

Assuming heavy steering must be a mechanical fault in the steering gear, when where the load sits front to rear is the more common cause.

IncorrectoRespuesta correcta: C — How much of the vehicle's total load one axle, or one set of axles, presses onto the pavement

Axle weight describes how much of the vehicle's total load that axle pushes down onto the pavement, which is exactly what a scale platform under those wheels reads. It is a load, not a piece of hardware and not a tire rating.

Confusing the load an axle carries with either the mass of the axle hardware or the load rating stamped on the tire sidewall.

IncorrectoRespuesta correcta: B — A bridge formula cuts the allowable per-axle weight when axles sit close together, so no short span of bridge or pavement takes the whole load at once

The concern is how much weight lands on a short stretch of structure at once. Bunching the axles concentrates the same tonnage over a smaller span, so the formula responds by lowering what each axle may legally carry.

The belief that being under the legal gross weight automatically means the axle weights are legal too, no matter how the axles are arranged.

IncorrectoRespuesta correcta: A — Within the first 50 miles

Straps and chains settle and cargo shifts slightly during the first miles of travel, so this early stop exists to catch the slack before it becomes movement, and adjustments are expected at that point.

Assuming a careful pre-trip check makes the early re-inspection unnecessary, when the whole point is that securement loosens once the load starts moving.

IncorrectoRespuesta correcta: A — On the tire's sidewall, stated for one specified inflation pressure

Every tire carries its own rating molded into the sidewall, and that rating only holds at the pressure it is quoted for. Let the pressure drop and the tire can no longer carry the weight printed on it, even though the number is still there.

Treating carrying capacity as a property of the truck instead of the individual tire, and ignoring that the rating is meaningless without correct inflation.

IncorrectoRespuesta correcta: C — 4,500 pounds

Federal rules set the combined working load limit of the securement system at no less than half the weight of the article being secured, so a 9,000-pound machine calls for at least 4,500 pounds of aggregate working load limit.

Assuming the securement system must be rated for the cargo's full weight, and confusing a device's working load limit with the far higher breaking strength printed by the manufacturer.

IncorrectoRespuesta correcta: A — Requirements differ from one jurisdiction to the next, so the driver has to learn what applies on the roads actually being driven

Several layers of government legislate on load weight, securement and covering, and their requirements are not identical. Crossing a line can change what a compliant load looks like, and the duty to know that travels with the driver rather than with the freight.

The belief that a single federal standard covers everything, so one compliant load needs no further thought once it crosses a state line.

IncorrectoRespuesta correcta: C — To stand between the driver and the freight when a hard stop or collision throws the load forward

In a hard stop the cargo keeps moving forward even after the truck has slowed, and the header board is the barrier standing between that cargo and the driver, which is why its condition matters at inspection.

Seeing the header board as an aerodynamic or convenience fitting rather than a piece of protective structure that must be sound.

IncorrectoRespuesta correcta: A — Taking a bend at speed, or making a sudden swerve around an obstacle

Rollover is driven by sideways force, and sideways force comes from turning. A curve or an emergency swerve supplies it; straight-line braking loads the vehicle forward instead, which does not tip it.

Thinking rollover is mainly a braking problem, so a driver with a top-heavy load believes gentle stopping is protection enough and does not also slow for curves and ramps.

IncorrectoRespuesta correcta: A — Recognizing that the legal maximum may not be a safe weight in those conditions and taking that into account before starting

Legal limits are written for ordinary roads and ordinary weather. Grades and slick surfaces change stopping and control long before any regulation changes, so the judgment has to be made by the driver, before the wheels turn.

Equating legal with safe, so a clean scale ticket is treated as settling the question regardless of terrain or weather.

IncorrectoRespuesta correcta: B — That the vehicle is inside its gross and axle weight limits, even with the contents unseen

A seal stops you from looking inside, but it does not stop you from weighing what you are pulling. Scales tell you what the eyes cannot, so weight compliance stays fully checkable and fully your obligation.

The belief that a seal you may not break also seals off your responsibility, so a sealed trailer can be hauled without any verification at all.

IncorrectoRespuesta correcta: B — It gathers speed more easily, takes longer to stop, and the brakes can give out under the heat they are asked to absorb

Extra weight is extra energy the brakes must turn into heat. Downhill that energy keeps arriving, so speed builds faster, stopping distance stretches, and the brakes can be pushed past the point where they shed heat fast enough to keep working.

The idea that overloading only costs power on the climb, so a downgrade is where the heavy truck gets that time back.

IncorrectoRespuesta correcta: B — A support reaching from high on the cargo down to the deck, or outward against the sidewalls

Blocking works at deck level, wedged tight against the cargo so it cannot slide. Bracing works from the top of the cargo down or outward to the floor and walls, resisting the load tipping or pushing over.

Using blocking and bracing as interchangeable words, so a driver installs only deck-level blocking and leaves a tall load free to topple forward.

IncorrectoRespuesta correcta: B — An open deck has no walls, so besides the tipping risk the cargo can slide sideways and leave the trailer altogether

A van's walls will catch a load that starts to move; a flat bed has nothing but the securement system holding it. The same badly stacked load can therefore both tip the rig and leave the deck.

Treating a flat bed and a van as equally forgiving on the theory that the cargo is strapped down either way.

IncorrectoRespuesta correcta: C — That it leaves the driver's forward and side vision clear, and that the emergency equipment can still be reached

Securement keeps cargo from moving, but cargo that stays put can still cause a crash by hiding traffic from you, or turn a small fire into a serious one by burying the extinguisher and warning devices.

The belief that once the load cannot shift, the job is complete, so obstructed sightlines and blocked emergency equipment go unnoticed.

IncorrectoRespuesta correcta: A — Two, which is the floor for a flatbed load of any size

Length-based spacing and the absolute floor are two separate requirements. Anything longer than five feet already calls for two devices, and in any case nothing on a flatbed counts as secured with a single tie-down, because one anchor still lets the article pivot around it.

Reasoning only from length and concluding that a short article is properly secured by one tie-down, when the rules set a two-device floor regardless.

IncorrectoRespuesta correcta: B — At that break, since cargo must be re-checked after every break as well as after three hours or 150 miles of driving

The schedule has two triggers running side by side, one based on driving time or distance and one based on stopping. A break brings the vehicle to a standstill anyway, which makes it the natural moment to walk the load.

Treating the three-hour or 150-mile interval as the only trigger, so breaks taken before that interval expires are skipped.