CCDL Permit Prep

Conocimientos generales · página 17 de 19

Preguntas de Conocimientos generales 321–340

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. May a carrier pressure you to certify a log entry you know is wrong?

    • ANo, unless the trip crossed state lines
    • BYes, if a supervisor approves the entry
    • CYes, if the error is under 15 minutes
    • DNo, coercing a false certification is prohibitedCorrecta

    The records rules bar a carrier from coercing a driver into falsely certifying data entries or a record of duty status, and edits need your confirmation.

    49 CFR § 395.30 · ELD record submissions and certification · verificado 2026-08-13

  2. Traducción en revisión. Se muestra el contenido actualizado en inglés. What is the deadline for a driver harassment complaint about logging technology?

    • A90 days after the eventCorrecta
    • B10 days after the event
    • C180 days after the event
    • DOne year after the event

    A harassment complaint alleging the carrier used the logging device against the driver is filed in writing no later than 90 days after the event.

    49 CFR § 386.12 · Complaint of harassment · verificado 2026-08-13

  3. Traducción en revisión. Se muestra el contenido actualizado en inglés. Where is an exhaust leak specifically prohibited on a truck?

    • AAbove the roofline of the cab
    • BBehind the rear axle of the tractor
    • CForward of or directly below the sleeperCorrecta
    • DAlongside the fifth wheel plate

    No part of the exhaust system may leak or discharge forward of or directly below the driver or sleeper compartment, because the fumes end up inside with you.

    49 CFR § 393.83 · Exhaust systems · verificado 2026-08-13

  4. Traducción en revisión. Se muestra el contenido actualizado en inglés. How may a damaged section of exhaust pipe be repaired?

    • AWith tape if the leak is small
    • BWith heat wrap until the next service
    • CWith a clamp-on patch for one trip
    • DProperly, never with wrap or patchesCorrecta

    Temporary repair of the exhaust system with wrap or patches is prohibited outright, so a wrapped pipe is an inspection failure rather than a fix.

    49 CFR § 393.83 · Exhaust system repairs · verificado 2026-08-13

  5. Traducción en revisión. Se muestra el contenido actualizado en inglés. Why may an exhaust outlet not discharge below the fuel tank or filler pipe?

    • AHot gases near fuel invite a fireCorrecta
    • BIt makes the engine run cooler
    • CIt shortens the life of the muffler
    • DIt reduces the vehicle's fuel mileage

    The rule keeps the discharge point away from the fuel tank and filler pipe, and away from wiring and combustible parts, for the obvious fire reason.

    49 CFR § 393.83 · Exhaust discharge location · verificado 2026-08-13

  6. Traducción en revisión. Se muestra el contenido actualizado en inglés. Why should each mirror be adjusted to show some part of your own vehicle?

    • AIt gives a reference point for judging the position of other imagesCorrecta
    • BIt removes all blind spots
    • CIt keeps the vehicle centered automatically
    • DIt replaces the need for regular mirror checks

    The manual says showing part of the vehicle in each mirror gives a reference point for judging the position of the other images.

    FMCSA Commercial Driver's License Manual (July 2014) · 2.4.2 Seeing to the Sides and Rear (Mirror Adjustment) · verificado 2026-09-25

  7. Traducción en revisión. Se muestra el contenido actualizado en inglés. Where should a loaded truck slow down for a highway exit?

    • AAt the stop sign at the ramp end
    • BIn the through lane before the exit
    • COnly once the ramp curve begins
    • DIn the deceleration lane, not the through laneCorrecta

    Braking in the through lane surprises traffic behind, and braking after the curve starts is what puts a high load on its side.

    FMCSA Commercial Driver's License Manual · Section 2 - Entering and Exiting Highways · verificado 2026-09-08

  8. Traducción en revisión. Se muestra el contenido actualizado en inglés. What is the first move before maneuvering in a tight yard or lot?

    • AWalk the area and plan a way outCorrecta
    • BDrive in and judge from the seat
    • CAsk another driver to move first
    • DSound the horn and proceed slowly

    Space seen from the cab is guesswork, and a driver who enters without an exit plan ends up backing blind between parked trailers.

    FMCSA Commercial Driver's License Manual · Section 2 - Maneuvering in Restricted Areas · verificado 2026-09-08

  9. Traducción en revisión. Se muestra el contenido actualizado en inglés. Why should a driver not assume the height posted at a bridge or overpass is correct?

    • ARe-paving or packed snow may have reduced the clearance since it was postedCorrecta
    • BPosted heights are always too low
    • CPosted heights apply only to empty vehicles
    • DBridges are measured only in summer

    The manual says not to assume posted heights are correct because re-paving or packed snow may have reduced clearances since the heights were posted.

    FMCSA Commercial Driver's License Manual (July 2014) · 2.7.4 Space Overhead · verificado 2026-09-25

  10. Traducción en revisión. Se muestra el contenido actualizado en inglés. What is the risk of cutting a left turn short in a combination vehicle?

    • AThe trailer brakes release automatically
    • BThe tractor loses steering assistance
    • CThe trailer strikes vehicles or the curb insideCorrecta
    • DThe load shifts toward the front axle

    The trailer wheels track inside the tractor's line, so a tight left turn sweeps the corner and whatever is waiting on it.

    FMCSA Commercial Driver's License Manual · Section 2 - Turning · verificado 2026-09-08

  11. Traducción en revisión. Se muestra el contenido actualizado en inglés. How does a driver keep the trailer clear when turning right at a corner?

    • ATurn from the center lane instead
    • BSwing left early in the approach
    • CHug the right curb through the turn
    • DReach the intersection, then swing wideCorrecta

    Swinging wide before the turn invites a car up the right side; the wide part of the turn belongs inside the intersection, not on the approach.

    FMCSA Commercial Driver's License Manual · Section 2 - Right Turns · verificado 2026-09-08

  12. Traducción en revisión. Se muestra el contenido actualizado en inglés. What does a driver do when a maneuver stops looking safe halfway through?

    • AStop, secure the vehicle, and reassess the path before continuingCorrecta
    • BContinue and correct at the end
    • CSpeed up to clear the tight point
    • DFold the mirrors and keep going

    FMCSA says backing is dangerous, to back slowly, and to stop and check the path if you are unsure. Secure the vehicle before exiting to look.

    FMCSA Commercial Driver's License Manual · Section 2 - Maneuvering in Restricted Areas · verificado 2026-09-08

  13. Traducción en revisión. Se muestra el contenido actualizado en inglés. What is the double-clutch technique on a manual truck transmission?

    • AHold the clutch down through both gears
    • BClutch to neutral, release, then clutch to gearCorrecta
    • CShift twice without using the clutch
    • DPress the clutch fully to the floor once

    The clutch comes up in neutral so engine and gearbox speeds can be matched, then goes down again to select the next gear.

    FMCSA Commercial Driver's License Manual · Section 2 - Shifting Gears · verificado 2026-08-14

  14. Traducción en revisión. Se muestra el contenido actualizado en inglés. How does a driver know when to upshift?

    • ABy the position of the throttle pedal
    • BBy the time spent in the gear
    • CBy engine speed and road speed togetherCorrecta
    • DBy the temperature of the coolant

    The tachometer and the speedometer decide the shift point together; guessing from throttle position is what leaves the engine lugging or screaming.

    FMCSA Commercial Driver's License Manual · Section 2 - When to Shift Up · verificado 2026-08-14

  15. Traducción en revisión. Se muestra el contenido actualizado en inglés. Why should a driver avoid shifting part-way through a curve?

    • AThe steering assist cuts out briefly
    • BThe transmission locks above idle
    • CThe trailer brakes apply on their own
    • DChanging gear unsettles traction mid-turnCorrecta

    A gear change transfers weight and briefly removes drive, and a loaded combination in a curve is where that matters most.

    FMCSA Commercial Driver's License Manual · Section 2 - When to Shift · verificado 2026-08-14

  16. Traducción en revisión. Se muestra el contenido actualizado en inglés. What does progressive shifting achieve?

    • ALower engine speeds and better fuel economyCorrecta
    • BFaster acceleration from every gear
    • CLonger clutch life in city traffic
    • DHigher top speed on the highway

    Shifting up before the engine reaches full speed keeps revolutions down, which burns less fuel and puts less noise and wear into the driveline.

    FMCSA Commercial Driver's License Manual · Section 2 - Shifting Patterns and Procedures · verificado 2026-08-14

  17. Traducción en revisión. Se muestra el contenido actualizado en inglés. What does the range selector do on a dual-range transmission?

    • ALocks the drive axles together
    • BSwitches the gearbox between low and high setsCorrecta
    • CEngages the engine compression brake
    • DChanges the rear axle ratio permanently

    The lever splits one shift pattern into two ranges, so the same H pattern is used twice and the range is changed at the top of the low set.

    FMCSA Commercial Driver's License Manual · Section 2 - Multi-Speed Dual-Range Transmissions · verificado 2026-08-14

  18. Traducción en revisión. Se muestra el contenido actualizado en inglés. What happens if a driver misses a shift on an upgrade?

    • AThe engine brake holds the vehicle still
    • BThe transmission selects a gear itself
    • CRoad speed drops and a lower gear is neededCorrecta
    • DThe trailer brakes hold the load in place

    Momentum is gone by the time the gear is found, so the driver ends up needing a lower gear than the one that was missed.

    FMCSA Commercial Driver's License Manual · Section 2 - Shifting Gears · verificado 2026-08-14

  19. Traducción en revisión. Se muestra el contenido actualizado en inglés. What should a driver do if the transmission will not go back into gear?

    • ARev the engine and try again hard
    • BForce the lever until it engages
    • CCoast in neutral to the next exit
    • DBring the vehicle to a safe stopCorrecta

    Coasting in neutral removes engine braking and control, and forcing the lever damages the gearbox; the safe answer is to stop and sort it out.

    FMCSA Commercial Driver's License Manual · Section 2 - Shifting Gears · verificado 2026-08-14

  20. Traducción en revisión. Se muestra el contenido actualizado en inglés. Why is the correct gear chosen before a grade rather than on it?

    • AA heavy vehicle cannot downshift once loaded upCorrecta
    • BThe engine brake works in any gear
    • CGear choice only affects fuel economy
    • DBrakes replace gear selection on grades

    Once the combination is rolling fast downhill, engine and road speed no longer match any lower gear, and the attempt leaves the driver in neutral with brakes alone.

    FMCSA Commercial Driver's License Manual · Section 2 - Selecting a Safe Speed and Gear · verificado 2026-08-14

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