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CDL Class A Exam Questions & Answers 2026 (11–20)

CDL Class A practice questions and answers 2026. Tap an option to test yourself — you'll see the correct answer and a plain-English explanation for every question. Free, no login.

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  1. Q11When starting a loaded tractor-trailer on a level surface, which gear should you typically begin in?

    • ANeutral, then ease into first gear only after the engine reaches operating temperature
    • BA low gear that allows smooth movement without excessive clutch slipping
    • CSecond gear to avoid jerking the trailer
    • DThe highest gear available to conserve fuel
    Show answer

    ✓ Correct answer: B. A low gear that allows smooth movement without excessive clutch slipping

    The CDL manual instructs drivers to start in a low gear appropriate for the load and road conditions so the vehicle moves smoothly without excessive clutch wear or slippage.

  2. Q12When coming to a stop in a vehicle equipped with a manual transmission, what is the correct procedure for the clutch?

    • APump the clutch repeatedly to help slow the vehicle
    • BLeave the clutch engaged until the vehicle is nearly stopped, then push it in
    • CPush the clutch in well before braking to reduce engine braking
    • DShift into neutral immediately and coast to a stop
    Show answer

    ✓ Correct answer: B. Leave the clutch engaged until the vehicle is nearly stopped, then push it in

    The CDL manual states you should keep the clutch engaged while braking to use engine braking, and only disengage the clutch when the engine speed drops too low, just before the vehicle stops.

  3. Q13When backing a straight truck, your first action after checking mirrors should be to:

    • ATurn on hazard lights and sound the horn three times
    • BBegin reversing slowly and steer as needed once underway
    • CShift directly into the highest reverse gear for better control
    • DGet out and walk the path to identify hazards before moving
    Show answer

    ✓ Correct answer: D. Get out and walk the path to identify hazards before moving

    The CDL manual's 'GOAL' principle (Get Out And Look) requires the driver to physically inspect the path behind the vehicle before any backing maneuver to identify obstacles and hazards.

  4. Q14Which of the following best describes the purpose of a retarder on a large commercial vehicle?

    • AIt slows the vehicle by applying resistance to the drivetrain, supplementing the service brakes
    • BIt increases the engine's power output during acceleration
    • CIt locks the rear axle to prevent skidding on wet pavement
    • DIt automatically downshifts the transmission when descending a grade
    Show answer

    ✓ Correct answer: A. It slows the vehicle by applying resistance to the drivetrain, supplementing the service brakes

    The CDL manual explains that retarders (engine, exhaust, hydraulic, or electric) help slow the vehicle without using the service brakes, reducing brake wear and heat on long downgrades.

  5. Q15During the double-clutching technique, what happens between the first and second clutch disengagement?

    • AThe driver releases the accelerator, lets the clutch out, and matches engine RPM to road speed in neutral before engaging the next gear
    • BThe driver holds the clutch pedal halfway down while moving the gearshift to the new gear
    • CThe driver pumps the clutch twice to clear air from the clutch lines before selecting a gear
    • DThe driver blips the throttle while keeping the clutch fully depressed throughout the shift
    Show answer

    ✓ Correct answer: A. The driver releases the accelerator, lets the clutch out, and matches engine RPM to road speed in neutral before engaging the next gear

    Double-clutching requires pushing the clutch in and moving to neutral, then releasing the clutch and adjusting RPM to match road speed, then pushing the clutch in again and selecting the target gear so gear speeds are synchronized.

  6. Q16When should a driver turn OFF a vehicle's retarder?

    • AAny time the vehicle speed exceeds 55 mph
    • BWhen the road surface is wet, icy, or otherwise slippery
    • CWhenever carrying a load heavier than 26,000 pounds
    • DOnly during backing maneuvers in a tight space
    Show answer

    ✓ Correct answer: B. When the road surface is wet, icy, or otherwise slippery

    The CDL manual warns that retarders can cause the rear wheels to skid on slippery surfaces because they apply braking force only to the drive axles; drivers should turn them off in slippery conditions.

  7. Q17If you miss a gear while shifting upward through a multi-speed transmission, what is the correct response?

    • ACome to a complete stop, then restart from a low gear
    • BSkip two gears ahead to compensate for the missed gear
    • CReturn to neutral, bring engine RPM to the proper range, and attempt the shift again
    • DForce the lever into the desired gear using firm pressure
    Show answer

    ✓ Correct answer: C. Return to neutral, bring engine RPM to the proper range, and attempt the shift again

    The CDL manual advises that if a gear cannot be engaged cleanly, the driver should return to neutral, re-match RPM to road speed, and reattempt the shift rather than forcing the lever.

  8. Q18What does road speed (vehicle speed in mph) have to do with when you shift gears?

    • AEach gear has an appropriate road speed range, and you shift when that range is reached, especially when a tachometer is unavailable
    • BFederal rules require all CDL drivers to shift at exactly 10 mph intervals regardless of load
    • CYou shift based on road speed only when the tachometer is broken
    • DRoad speed is irrelevant; only engine RPM determines the correct shift point
    Show answer

    ✓ Correct answer: A. Each gear has an appropriate road speed range, and you shift when that range is reached, especially when a tachometer is unavailable

    The CDL manual notes that drivers can use road speed as a guide for shifting because each gear corresponds to a road speed range, which is particularly useful when a tachometer is absent or difficult to read.

  9. Q19A driver is backing a 53-foot trailer into a dock using a 90-degree blind-side backing maneuver. After the initial setup, the driver realizes the trailer is drifting wide. What is the correct steering correction?

    • AAccelerate slightly to straighten the trailer through increased kingpin tension
    • BTurn the steering wheel away from the drift (toward the trailer) to bring the trailer back on line
    • CStop immediately and pull forward to reset; do not attempt a correction while reversing
    • DTurn the steering wheel toward the drift to push the trailer back on line
    Show answer

    ✓ Correct answer: B. Turn the steering wheel away from the drift (toward the trailer) to bring the trailer back on line

    When backing, steering away from the drift (toward the side the trailer is drifting toward) causes the rear of the trailer to swing back toward the intended path; this is the standard CDL manual correction technique for off-track backing.

  10. Q20A driver is descending a 6% grade in a fully loaded combination vehicle. After several miles, the driver notices the service brakes feel 'spongy' and require more pedal travel than normal. The MOST likely cause is:

    • ABrake fade caused by heat buildup from excessive or continuous brake application on the grade
    • BThe transmission has automatically downshifted, reducing driveline resistance
    • CAir pressure has dropped below 90 psi, causing partial loss of hydraulic assist
    • DThe retarder has engaged automatically and is interfering with normal pedal feel
    Show answer

    ✓ Correct answer: A. Brake fade caused by heat buildup from excessive or continuous brake application on the grade

    The CDL manual identifies brake fade as a condition caused by overheating of the brakes from prolonged or excessive application on downgrades; proper technique is to use a low gear and apply brakes in short firm applications rather than riding them continuously.

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