CDL øvingsprøve

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• Øvingsprøve · 15 spørsmål

  CDL General Knowledge øvingsprøve

• Øvingsprøve · 15 spørsmål

  CDL Air Brakes øvingsprøve

• Øvingsprøve · 15 spørsmål

  CDL Combination Vehicles øvingsprøve

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1. 1. The CDL skills test is made up of which three parts?

   • A. A written test, a vision test and a road test
   • B. A vehicle inspection test, a written test and a drug test
   • C. A vehicle inspection test, a basic vehicle control test and an on-road driving test
   • D. A basic control test, a coupling test and an air brake test
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   Svar: C. A vehicle inspection test, a basic vehicle control test and an on-road driving test

   The knowledge tests are taken on a computer or on paper, and the skills test is the practical part in the vehicle. It always runs in the same order: you show the examiner your pre-trip inspection, then you demonstrate basic control such as backing and offset alley docking, then you drive on public roads. You have to pass all three, and you take the skills test in a vehicle that matches the class of license you want.

2. 2. You have to stop on the shoulder of a divided highway. Where do the three warning devices go?

   • A. All three together, about 50 feet behind the vehicle
   • B. One about 10 feet behind the vehicle, one about 100 feet behind and one about 200 feet behind
   • C. One 10 feet in front of the vehicle, one 100 feet behind and one 500 feet behind
   • D. One at each corner of the vehicle and one on the roof
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   Svar: B. One about 10 feet behind the vehicle, one about 100 feet behind and one about 200 feet behind

   On a divided or one way road the devices go behind you, toward the traffic that is coming: about 10 feet back on the traffic side, about 100 feet back and about 200 feet back. On a two lane two way road you protect both directions instead, with a device about 100 feet ahead and about 100 feet behind. You have 10 minutes to get them out, and on a hill or a curve you move the far one back so drivers see it before they see you.

3. 3. You are driving a 50 foot combination at 55 mph on a dry road. Using the rule of thumb in the CDL manual, what is your minimum following distance?

   • A. 3 seconds
   • B. 4 seconds
   • C. 5 seconds
   • D. 6 seconds
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   Svar: D. 6 seconds

   The rule is one second for every 10 feet of vehicle length at speeds below 40 mph, then add one more second above 40 mph. Fifty feet gives you five seconds, and the extra second for speed makes six. Count the seconds between the vehicle ahead passing a fixed object and your own front bumper reaching it, and add more time on wet or icy roads and at night.

4. 4. You have loaded and secured your cargo and started the trip. When must you first re-check the securement?

   • A. There is no need to check again once it is secured
   • B. Within the first 50 miles
   • C. After the first 150 miles
   • D. Only at the end of the driving day
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   Svar: B. Within the first 50 miles

   You inspect the cargo and its securement within the first 50 miles, because tiedowns settle and loosen once the load starts moving. After that you re-check every 3 hours or 150 miles, or each time you take a break, whichever comes first. The driver is responsible for the load even when somebody else loaded and secured it, so a sealed trailer you cannot inspect does not remove your duty to stay within weight limits.

5. 5. Which of the following are correct ways to control your speed on a long, steep downgrade?

   Velg alle som passer.

   • A. Select a low gear before you start down the grade
   • B. Shift into neutral and coast to save fuel
   • C. Use the braking effect of the engine as your main way of holding speed
   • D. Apply the brakes firmly to slow about 5 mph below your safe speed, then release them
   • E. Hold light, steady pressure on the brakes all the way down
   • F. Wait until you feel the brakes fading before you downshift
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   Svar: A. Select a low gear before you start down the grade, C. Use the braking effect of the engine as your main way of holding speed, D. Apply the brakes firmly to slow about 5 mph below your safe speed, then release them

   Gravity is what speeds you up, so the plan has to be set before you start down. Pick the gear at the top, because a heavy vehicle may not go back into gear once it is rolling fast. Let the engine hold most of the speed and use the brakes in firm, short applications, known as snub braking, so they get time to cool between them. Riding the brakes cooks the linings until they stop working, and coasting in neutral is both unsafe and illegal in most states.

6. 6. Complete the sentence.

   Under the federal hours of service rules, a property carrying driver may drive for up to _____ hours, and only after _____ consecutive hours off duty.

   Alternativer for luke 1: 8, 10, 11, 14

   Alternativer for luke 2: 8, 10, 11, 12

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   Svar: 11, 10

   Those 11 driving hours have to fit inside a 14 hour window that starts when you come on duty, and the window does not stop for meals or loading. You also need a 30 minute break after 8 cumulative hours of driving, and you are capped at 60 hours in 7 days or 70 hours in 8 days depending on your carrier's schedule. Passenger carrying drivers work to different numbers, and some short haul drivers qualify for an exception, so read the rule that matches your job.

7. 7. You pass your CDL skills test in a vehicle that does not have air brakes. What does that mean for your licence?

   • A. Nothing, because the air brakes knowledge test on its own covers you
   • B. You may drive air brake vehicles for one year and then have to retest
   • C. Your CDL carries an air brake restriction and you may not drive a commercial vehicle with air brakes
   • D. You may drive air brake vehicles as long as a licensed driver rides with you
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   Svar: C. Your CDL carries an air brake restriction and you may not drive a commercial vehicle with air brakes

   The restriction, usually printed as an L, lands on your licence if you fail the air brakes knowledge test, skip the air brake part of the pre-trip inspection, or take the skills test in a vehicle without air brakes. Most vehicles you will be hired to drive have them, so it closes off a lot of work. Getting it removed means going back and passing the air brake portions in a vehicle that actually has air brakes.

8. 8. Air pressure is falling and the warning has come on. Why should you not pump or fan the brake pedal?

   • A. Pumping overheats the brake drums
   • B. Pumping locks the trailer wheels before the tractor wheels
   • C. Every brake application spends air, so pumping empties the tanks faster
   • D. Pumping has no effect at all on an air brake system
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   Svar: C. Every brake application spends air, so pumping empties the tanks faster

   This is the habit drivers bring over from cars. In a hydraulic system pumping can build pressure back up, but an air system works the other way, because each press of the pedal releases air from the tanks and you cannot get it back. When air is already low, fanning the pedal spends what little you have left. Use steady pressure, slow down and park.

9. 9. Complete the sentence.

   Before you can take the skills test for a first time Class A or Class B licence, federal rules require you to finish _____ with a school listed on the federal Training Provider Registry.

   Alternativer for luke 1: entry level driver training, a defensive driving course, a hazmat awareness course, a medical examination

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   Svar: entry level driver training

   Entry level driver training has been required since February 2022. It applies to a first time Class A or Class B licence, an upgrade from Class B to Class A, and the first time you go for the passenger, school bus or hazmat endorsement. The training has a theory part and a behind the wheel part, and the provider reports your completion to the registry before your state will schedule the skills test.

10. 10. Two air lines run from the tractor to the trailer. What does the emergency line do?

    • A. It carries air only while you are pressing the brake pedal
    • B. It vents air out of the trailer tanks when you park
    • C. It is a spare line used only if the service line fails
    • D. It charges the trailer air tanks and controls the trailer emergency brakes
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    Svar: D. It charges the trailer air tanks and controls the trailer emergency brakes

    The emergency line, usually the red one, keeps the trailer supplied with air and holds the emergency brakes off. If it loses pressure, for example because the trailer breaks away or a line rips out, the trailer brakes come on by themselves. The service line, usually the blue one, only carries air when you press the brake pedal or use the trailer hand valve. Cross the two lines and you can drive off with no trailer brakes at all.

11. 11. As you take a right turn in a tractor trailer, the trailer's rear wheels

    • A. follow a shorter path than the tractor's front wheels, so you have to swing wide
    • B. follow exactly the same path as the tractor's front wheels
    • C. follow a wider path than the tractor's front wheels
    • D. lift clear of the road until the turn is finished
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    Svar: A. follow a shorter path than the tractor's front wheels, so you have to swing wide

    This is off-tracking, and the longer the vehicle the more of it you get. The fix is to turn wide as you complete the turn, not before it: keep the rear of your vehicle close to the curb, drive forward until the front wheels are well past the corner, then turn. Swinging left first invites a car to slip up the right side, and that is exactly where your trailer is about to go.

12. 12. Which of the following lower the risk of rolling a loaded trailer over?

    Velg alle som passer.

    • A. Keeping the cargo as low as you can
    • B. Keeping the load centered over the axles and balanced side to side
    • C. Slowing down before you enter a curve or an exit ramp and staying slow through it
    • D. Putting the heaviest cargo on top so the weight spreads out
    • E. Braking hard in the middle of the curve if the trailer starts to feel light
    • F. Taking exit ramps at the posted speed, since ramp speeds are set for trucks
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    Svar: A. Keeping the cargo as low as you can, B. Keeping the load centered over the axles and balanced side to side, C. Slowing down before you enter a curve or an exit ramp and staying slow through it

    Rollovers account for a large share of the crashes that kill truck drivers, and most of them come down to two things: a load carried too high and too much speed in a curve. A high center of gravity tips long before the driver feels anything wrong, and the trailer can go over while the tractor still feels planted. Posted ramp speeds are set for cars, so a loaded rig often has to be well under them.

13. 13. You want to drive a single vehicle with a gross vehicle weight rating of 26,001 pounds or more, and you will not tow anything heavier than 10,000 pounds. Which class of CDL covers that?

    • A. Class A
    • B. Class B
    • C. Class C
    • D. No CDL is required
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    Svar: B. Class B

    Class B is the single heavy vehicle license, such as a straight truck, a dump truck or a large bus, and it lets you tow a trailer up to 10,000 pounds. Class A covers combinations with a gross combination weight rating of 26,001 pounds or more where the towed unit is over 10,000 pounds. Class C covers smaller vehicles that fall outside A and B but carry 16 or more people including the driver, or carry hazardous materials in amounts that need placards. The higher class also lets you drive the lower ones, as long as you hold the right endorsements.

14. 14. Which of these require a separate endorsement on your CDL?

    Velg alle som passer.

    • A. Hauling hazardous materials in amounts that require placards
    • B. Driving a school bus
    • C. Driving after dark
    • D. Driving a tank vehicle
    • E. Driving across a state line
    • F. Towing a trailer under 10,000 pounds
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    Svar: A. Hauling hazardous materials in amounts that require placards, B. Driving a school bus, D. Driving a tank vehicle

    An endorsement is permission added to your license for a specific kind of load or vehicle, and each one has its own knowledge test. The common ones are H for hazardous materials, N for tank vehicles, P for passengers, S for school bus, T for doubles and triples, and X for a tank carrying hazardous materials. The hazardous materials endorsement also needs a security threat assessment, so it takes longer to get. Restrictions work the other way and take something away, for example an L restriction if you never passed the air brake test.

15. 15. Complete the sentence.

    A driver of a commercial motor vehicle is considered to be under the influence at a blood alcohol concentration of _____ or higher, and may not drink alcohol within _____ hours of going on duty.

    Alternativer for luke 1: 0.02, 0.04, 0.08, 0.10

    Alternativer for luke 2: 2, 4, 8, 12

    Vis svar og forklaring

    Svar: 0.04, 4

    The commercial limit is half the usual limit for car drivers, and a reading between 0.02 and 0.039 still puts you out of service for 24 hours even though it is under the legal limit. Refusing a required test counts the same as failing it. A first major offense such as this one disqualifies you for at least a year, three years if you were hauling placarded hazardous materials, and a second major offense is a lifetime disqualification.

Dette står på CDL-kunnskapsprøven

Det finnes ingen felles nasjonal CDL-eksamen i USA. Det er delstaten din som holder prøven, og nesten hver delstat skriver den fra AAMVA model Commercial Driver License Manual, som den gir ut på nytt gratis som sin egen CDL-manual. Det nyttigste en CDL-øvingsprøve kan gjøre, er derfor å sende deg tilbake til den boka, for det er derfra de ekte spørsmålene dine er hentet. Last ned den gjeldende manualen til din delstat først.

Hvilke prøver du må ta, avhenger av hva du vil kjøre. Alle tar general knowledge. Du legger til air brakes hvis kjøretøyet ditt har trykkluftbremser, combination vehicles for Class A, og en egen prøve for hver endorsement, som tank, passenger, school bus eller hazardous materials. Antall spørsmål og grensen for bestått settes av delstaten din, og åtti prosent er en vanlig grense for bestått, så les nettsiden til delstatens førerkortmyndighet i stedet for et tall du fant på nett.

Det følger papirarbeid med prøven også. Du trenger et commercial learner's permit, et øvingsbevis for tunge kjøretøy, før du kan øvingskjøre på offentlig vei, og de fleste delstater krever at du har hatt det i en ventetid først. Sjåfører som kjører mellom delstater må ha et gyldig medical examiner's certificate registrert. Nye søkere til Class A og Class B, og søkere til endorsementene hazardous materials, passenger og school bus, må også fullføre entry level driver training hos en tilbyder som står på det føderale Training Provider Registry.

Slik bruker du denne smakebiten

Dette settet tar prøver på tvers av hele kunnskapsprøven i stedet for å gå i dybden på én del. Seks spørsmål er general knowledge, tre er de viktigste faktaene om trykkluftbremser, tre er det grunnleggende om vogntog, og tre er reglene og papirene som dukker opp uansett hvilken klasse du sikter mot. Det er et kart, ikke et helt kurs, så bruk det til å finne ut hvilket kapittel i manualen din du er svakest i.

Ta den i én økt uten notater, og les så forklaringen til hvert spørsmål, også de du fikk riktig. Behandle et galt svar som et tema og ikke som et faktum. Bommet du på spørsmålet om lavt lufttrykk, skal du ikke bare pugge tallet, men lese hele kapittelet om air brakes, for prøven spør om den samme tanken fra flere kanter.

De tre quizene som er lenket under går dypere på general knowledge, air brakes og combination vehicles. Ta denne først for å se hvor du står, og ta så den som passer til prøven du faktisk er satt opp til. Å lese manualen høyt, én del om gangen, og så svare på spørsmål om den delen er tregere enn å skumlese og virker langt bedre.

Slik gjør StudyPDF delstatens CDL-manual om til fullengdes øvingsprøver

Femten spørsmål kan vise deg hvor du er svak. De gjør deg ikke klar alene, og ingen generell spørsmålsbank treffer manualen til din delstat, som er akkurat den boka sensoren din skriver fra.

StudyPDF jobber fra ditt materiale i stedet. Du laster opp PDF-en av delstatens CDL-manual, arkene fra trafikkskolen din eller de endorsement-kapitlene du bryr deg om, og Bo, studieagenten, bygger fullengdes øvingsprøver fra akkurat de sidene. Hvert spørsmål er forankret i ditt dokument, og hver forklaring viser hvor svaret kommer fra, så du kan hoppe rett til siden når noe ser feil ut. Du kan lage nye prøver så ofte du vil, spisse dem mot én del som air brakes eller lastsikring, og følge med på hvilke temaer du stadig bommer på.

Du trenger ikke en fil for å komme i gang. Har du ingenting å laste opp ennå, kan du bare oppgi et tema, for eksempel tilkopling av vogntog eller hours of service, så skriver Bo en øvingsprøve på det. Gratis å komme i gang.