CCDL Permit Prep

Conocimientos generales · página 2 de 19

Preguntas de Conocimientos generales 21–40

Parte del banco de 376 preguntas de Conocimientos generales. Cada respuesta cita el Manual CDL de FMCSA o la norma federal de donde proviene.

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  1. Traducción en revisión. Se muestra el contenido actualizado en inglés. Braking has failed on a downgrade and a marked escape ramp is reachable. What should you do?

    • AUse the escape rampCorrecta
    • BTurn into oncoming traffic
    • CJump out of the vehicle while it is still moving
    • DShift to a higher gear

    Use the available escape ramp promptly. Do not lose the remaining escape opportunity trying to force a lower gear after speed has built up.

    Oregon DMV Commercial Driver Manual · 2.16.2; 2.17.3 · verificado 2026-09-07

  2. Traducción en revisión. Se muestra el contenido actualizado en inglés. Under federal CDL classifications, what class is required for a combination vehicle with a GCWR of 26,001 pounds or more when the towed unit has a GVWR of more than 10,000 pounds?

    • AClass B
    • BClass ACorrecta
    • CClass C
    • DAny class

    Under 49 CFR 383.91, Group A requires a Class A CDL for a combination vehicle with a GCWR of 26,001 pounds or more when the towed unit has a GVWR of more than 10,000 pounds.

    49 CFR § 383.91 · Section 383.91(a): Group A · verificado 2026-09-08

  3. Traducción en revisión. Se muestra el contenido actualizado en inglés. Under federal CDL classifications, which vehicle group requires a Class B CDL?

    • AAny combination vehicle
    • BA single vehicle with a GVWR of 26,001 pounds or more that tows a unit with a GVWR of 10,000 pounds or lessCorrecta
    • COnly passenger vehicles, regardless of the vehicle’s weight rating
    • DOnly tank vehicles

    Under 49 CFR 383.91, Group B requires a Class B CDL for a single vehicle with a GVWR of 26,001 pounds or more, or that vehicle towing a unit with a GVWR of 10,000 pounds or less.

    49 CFR § 383.91 · Section 383.91(b): Group B · verificado 2026-09-08

  4. Traducción en revisión. Se muestra el contenido actualizado en inglés. A Class C CDL is required for vehicles:

    • ADesigned to transport 16+ passengers or placarded hazmat, when not Class A or BCorrecta
    • BUsed only for personal transport
    • CTowing any trailer, regardless of passenger count or hazardous materials placarding
    • DOver 26,001 lbs GVWR

    Class C CDL is for vehicles not meeting Class A or B criteria that carry 16+ passengers (including driver) or transport placarded hazardous materials.

    49 CFR § 383.91 · Commercial motor vehicle groups - Group C · verificado 2026-09-08

  5. Traducción en revisión. Se muestra el contenido actualizado en inglés. CDL holders are disqualified from driving a commercial vehicle for at least one year for a first offense of:

    • ADriving a CMV under the influence of alcoholCorrecta
    • BSpeeding over 15 mph
    • CFailing to signal a lane change
    • DAn overweight violation

    Under 49 CFR 383.51(b), Table 1, a first conviction for driving under the influence of alcohol disqualifies a CDL holder for at least one year (three years if the CMV was placarded for hazardous materials). The same one-year disqualification applies if the offense happens in a non-CMV, such as a personal vehicle.

    49 CFR § 383.51 · 49 CFR 383.51: Disqualification for major offenses · verificado 2026-09-29

  6. Traducción en revisión. Se muestra el contenido actualizado en inglés. Does the federal 0.04% CDL disqualification threshold apply when a CDL holder drives a non-commercial vehicle?

    • ANo; that federal CMV threshold does not set the BAC rule for a non-commercial vehicleCorrecta
    • BYes; it applies to every vehicle the CDL holder drives
    • CYes; but only when the vehicle is empty
    • DNo; a CDL holder may drive any vehicle after drinking

    The federal 0.04% CDL disqualification rule is tied to operating a commercial motor vehicle. Do not turn it into a national BAC limit for a non-commercial vehicle; the applicable state or other law must be checked.

    49 CFR § 383.51 · § 383.51: CMV alcohol-related disqualification standards · verificado 2026-09-08

  7. Traducción en revisión. Se muestra el contenido actualizado en inglés. Under federal CDL endorsement classifications, which endorsement is required to operate a vehicle pulling double or triple trailers?

    • AH endorsement
    • BN endorsement
    • CT endorsementCorrecta
    • DP endorsement

    Under 49 CFR 383.93, the T endorsement is required to operate a vehicle pulling double or triple trailers.

    49 CFR § 383.93 · Section 383.93(e): Double/triple trailers endorsement · verificado 2026-09-08

  8. Traducción en revisión. Se muestra el contenido actualizado en inglés. Under federal CDL endorsement classifications, the H endorsement permits a driver to transport:

    • AHeavy loads
    • BHigh-value cargo
    • CHousehold goods
    • DHazardous materialsCorrecta

    Under 49 CFR § 383.93(c), the H endorsement is the hazardous-materials endorsement. It applies to the applicable hazardous-material operation; H does not classify cargo by weight, market value, or household use.

    49 CFR § 383.93 · Section 383.93(c): Hazardous materials endorsement · verificado 2026-09-08

  9. Traducción en revisión. Se muestra el contenido actualizado en inglés. For a first H endorsement applicant who is subject to ELDT, what must happen before the State may give the H knowledge test?

    • AComplete the required H theory training with a Training Provider Registry-listed providerCorrecta
    • BReceive a TSA determination only after passing the knowledge test
    • CPass an H road skills test
    • DComplete a physical-fitness test at an approved center

    For a first H endorsement subject to ELDT, the required theory training must be completed with a registered provider before the State may give the H knowledge test. The TSA security-threat assessment is a separate issuance requirement; this permit-prep product does not provide ELDT.

    FMCSA Entry-Level Driver Training · ELDT applicability: first H endorsement before knowledge test · verificado 2026-09-07

  10. Traducción en revisión. Se muestra el contenido actualizado en inglés. Under federal CDL endorsement classifications, when is the P endorsement required?

    • APulling trailers with a GVWR of more than 10,000 pounds
    • BParking oversized vehicles
    • COperating a vehicle designed to transport 16 or more passengers, including the driverCorrecta
    • DPermit-only driving

    Under 49 CFR 383.93, the P endorsement is required to operate a vehicle designed to transport 16 or more passengers, including the driver.

    49 CFR § 383.93 · Section 383.93(b): Passenger endorsement · verificado 2026-09-08

  11. Traducción en revisión. Se muestra el contenido actualizado en inglés. What type of operation does the N endorsement cover?

    • ANight driving
    • BDriving as a new CDL holder
    • COperating a tank vehicle that meets the CDL tank-vehicle definitionCorrecta
    • DCarrying any non-hazardous load

    N identifies tank vehicles. The federal definition includes qualifying tanks attached permanently or temporarily; it is not limited to a permanently mounted tank of any size. Hazardous materials can require an additional endorsement.

    eCFR 49 CFR 383.5 and Oregon CDL manual section 8 · 383.5 tank vehicle definition; Oregon section 8 introduction · verificado 2026-09-07

  12. Traducción en revisión. Se muestra el contenido actualizado en inglés. Which windshield condition fails the federal condition rule in 49 CFR 393.60(c)?

    • AOne crack that no other crack intersects
    • BIntersecting cracks in the regulated windshield areaCorrecta
    • COne small damaged spot that fits under a 3/4-inch disc and is more than 3 inches from another damaged spot
    • DA clean undamaged area above the steering wheel

    The federal condition rule allows a crack that is not intersected by another crack. It also allows a small isolated damaged area within stated size and spacing limits. Intersecting cracks in the regulated area do not meet those exceptions. This question identifies a federal equipment violation; it does not assign a roadside out-of-service classification.

    49 CFR § 393.60 · 393.60(c) — Windshield condition · verificado 2026-09-07

  13. Traducción en revisión. Se muestra el contenido actualizado en inglés. Which tire condition prohibits operation under 49 CFR 393.75?

    • AA tire with body ply or belt material exposed through the tread or sidewallCorrecta
    • BA tire with a clean sidewall and correct inflation
    • CA tire with an accessible valve stem cap
    • DA tire with even tread wear above the federal minimum

    A commercial motor vehicle may not be operated with a tire that has body ply or belt material exposed through the tread or sidewall. Have the tire corrected before operation.

    eCFR 49 CFR 393.75 — Tires · 393.75(a) — Tire condition · verificado 2026-09-07

  14. Traducción en revisión. Se muestra el contenido actualizado en inglés. The minimum tread depth in a major groove for a tire other than a front tire on a bus, truck, or truck tractor is:

    • A1/32 inch
    • B2/32 inchCorrecta
    • C4/32 inch
    • D6/32 inch

    Federal rules require at least 2/32 inch tread depth in a major groove for tires other than the front tires on a bus, truck, or truck tractor. Front tires on those vehicles need at least 4/32 inch.

    eCFR 49 CFR 393.75 — Tires · 393.75(c) — Tread groove depth · verificado 2026-09-07

  15. Traducción en revisión. Se muestra el contenido actualizado en inglés. Under current federal rules (49 CFR 396.11), when must a driver prepare a written driver vehicle inspection report at the end of the day's work?

    • AAfter every workday, even when nothing was found or reported
    • BA report for the next driver to complete
    • CWhen a defect or deficiency was discovered by or reported to the driverCorrecta
    • DA fuel-level report only

    Under 49 CFR 396.11(a)(2), as amended in 2026 (91 FR 7896), a driver must prepare a written report at the completion of each day's work when a defect or deficiency that would affect safe operation or cause a breakdown was discovered by or reported to the driver. The no-defect exception now applies to property- and passenger-carrying vehicles alike. The duty to inspect and any carrier or state procedures still apply.

    49 CFR § 396.11 · § 396.11(a)(2) — Report required when a defect or deficiency is found or reported · verificado 2026-09-23

  16. Traducción en revisión. Se muestra el contenido actualizado en inglés. When checking the coupling system during inspection, you should verify that:

    • AThe fifth wheel locking jaws are closed around the kingpin shank, not its headCorrecta
    • BThe paint is not chipped
    • CThe trailer is loaded evenly
    • DThe fuel tank is full before coupling begins

    Verify the fifth-wheel jaws are securely closed around the kingpin shank, not its head, and that there is no space between the upper and lower fifth wheel.

    FMCSA Commercial Driver License Manual · Section 6.5.1: Coupling system inspection · verificado 2026-09-08

  17. Traducción en revisión. Se muestra el contenido actualizado en inglés. Which statement about spare electrical fuses is correct under current federal emergency-equipment rules?

    • AThey may be carried, but 49 CFR 393.95 no longer requires themCorrecta
    • BThey are required on every commercial motor vehicle
    • CThey are required only for placard-required hazardous-material loads
    • DThey replace required stopped-vehicle warning devices

    FMCSA removed the federal requirement to carry spare electrical fuses effective April 20, 2026. A carrier may still choose to carry them. This change does not remove the rules for a properly rated fire extinguisher or stopped-vehicle warning devices.

    eCFR 49 CFR 393.95 — Emergency equipment on all power units; FMCSA final rule 91 FR 7877 · 393.95(a) and (f); paragraph (b) reserved after 91 FR 7877, effective 2026-04-20 · verificado 2026-09-07

  18. Traducción en revisión. Se muestra el contenido actualizado en inglés. When driving at night, you should:

    • ADrive at the same speed as in daylight
    • BFollow other vehicles closely for extra light
    • CUse high beams at all times
    • DReduce speed so you can stop within the range of your headlightsCorrecta

    Never overdrive your headlights. Reduce speed at night so you can stop within the distance illuminated ahead.

    FMCSA Commercial Driver License Manual · Section 2: Driving Safely · verificado 2026-09-08

  19. Traducción en revisión. Se muestra el contenido actualizado en inglés. The best way to take a curve in a CMV is to:

    • ACoast through without using gas or brakes
    • BAccelerate through the curve
    • CBrake hard in the curve rather than before entering it
    • DSlow to a safe speed before the curve, then accelerate gently through itCorrecta

    Slow down before entering the curve. Braking in a curve can cause a skid. Gentle acceleration through the curve helps maintain stability.

    FMCSA Commercial Driver License Manual · Section 2: Driving Safely · verificado 2026-09-08

  20. Traducción en revisión. Se muestra el contenido actualizado en inglés. What is the proper way to use the clutch when starting from a stop on a hill (manual transmission)?

    • AHold with the parking brake, then release as you engageCorrecta
    • BPop the clutch quickly without using the brake
    • CRoll backward slightly before engaging
    • DRev the engine high before releasing the clutch

    On a hill start, use the parking brake to prevent rollback. Release it smoothly as the clutch engages and the vehicle begins to move.

    FMCSA Commercial Driver License Manual · Section 2.2.1: Accelerating without rolling back · verificado 2026-09-08

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