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Washington CDL practice

Selected knowledge practice, not a complete licensing course or practical training.

Washington CDL Practice 1

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Question 1 of 20
  1. 1. You inspect a different tractor this morning. What approach makes an omitted safety item less likely?
  2. 2. During the guide's stationary hydraulic-brake check, the pedal continues to sink under firm pressure. What is the appropriate response?
  3. 3. Your drive tires begin spinning as you accelerate a heavy truck on a slick surface. How should you respond?
  4. 4. Which transmission generally calls for double-clutching to shift gears in the guide's manual-transmission procedure?
  5. 5. For routine road scanning, how far ahead does the CDL guide recommend looking while also checking nearer conditions?
  6. 6. A car driver behind your truck asks you to wave them past. What is the safer response?
  7. 7. Under comparable ideal conditions, doubling speed has roughly what effect on braking distance alone?
  8. 8. Near freezing, the pavement looks wet but the surface may actually be a thin transparent frozen layer. What is this hazard?
  9. 9. A car is following your truck too closely. Which change helps you avoid a sudden stop that it may not handle?
  10. 10. You must cross a road with a heavily loaded truck. Compared with a car, what should you plan for?
  11. 11. An angry driver repeatedly gestures and tries to get ahead of your truck. What is the safest response?
  12. 12. Before climbing into a truck after freezing rain, what should you clear as well as the windows?
  13. 13. One train has cleared a crossing with two tracks. What hazard remains before your truck proceeds?
  14. 14. Your truck's brakes fail on a descent and a marked escape ramp is available. What should you do?
  15. 15. A loaded truck has ABS. Does that make taking a curve too fast safe?
  16. 16. Warehouse staff load and secure your truck while you complete paperwork. Does that remove your responsibility for the load?
  17. 17. You change duty status after a short drive with an inspectable load. Neither 3 hours nor 150 miles has elapsed. Does the cargo rule still require a recheck?
  18. 18. Too much cargo weight is shifted toward the back, leaving the front axle too lightly loaded. What can result?
  19. 19. Under the general tiedown-count rule, an unblocked 4-foot, 900-pound article needs at least how many tiedowns? Assume adequate strength and no special commodity rule.
  20. 20. Your tiedowns meet the minimum count, but their calculated aggregate WLL is below the required amount. Is the cargo ready to travel?
Review all 20 questions with answers

  1. You inspect a different tractor this morning. What approach makes an omitted safety item less likely?

    Correct answer: Follow the same systematic inspection sequence each time

    A consistent inspection sequence helps you cover every required area. Familiarity or a clean appearance does not show that the vehicle is safe.

    Source: Washington Commercial Driver Guide, N/10/20; section 2.1.5, physical PDF 31, printed 2-3. ↗

  2. During the guide's stationary hydraulic-brake check, the pedal continues to sink under firm pressure. What is the appropriate response?

    Correct answer: Have the brake problem corrected before driving

    A pedal that moves while held firmly can indicate a leak or another hydraulic fault. This is a defect to correct before operating, not a normal warm-up condition.

    Source: Washington Commercial Driver Guide, N/10/20; section 2.1.5, physical PDF 35, printed 2-7. ↗

  3. Your drive tires begin spinning as you accelerate a heavy truck on a slick surface. How should you respond?

    Correct answer: Ease off the accelerator to reduce wheelspin

    Excess power can overwhelm the available traction. Reduce it, then use smooth, gradual acceleration suited to the surface.

    Source: Washington Commercial Driver Guide, N/10/20; section 2.2.1, physical PDF 36, printed 2-8. ↗

  4. Which transmission generally calls for double-clutching to shift gears in the guide's manual-transmission procedure?

    Correct answer: An unsynchronized heavy-vehicle manual transmission

    Most unsynchronized heavy-vehicle manuals need double-clutching. Synchronized manuals do not require it; learn the procedure for the actual vehicle.

    Source: Washington Commercial Driver Guide, N/10/20; section 2.3.1, physical PDF 37, printed 2-9. ↗

  5. For routine road scanning, how far ahead does the CDL guide recommend looking while also checking nearer conditions?

    Correct answer: About 12 to 15 seconds of travel ahead

    The look-ahead recommendation gives time to spot changes and plan. It is a scanning distance, not the following-gap formula.

    Source: Washington Commercial Driver Guide, N/10/20; section 2.4.1, physical PDF 38, printed 2-10. ↗

  6. A car driver behind your truck asks you to wave them past. What is the safer response?

    Correct answer: Do not signal that passing is safe; let that driver assess it

    Do not take responsibility for directing another driver's pass. They may face hazards you cannot assess from the truck.

    Source: Washington Commercial Driver Guide, N/10/20; section 2.5.1, physical PDF 40, printed 2-12. ↗

  7. Under comparable ideal conditions, doubling speed has roughly what effect on braking distance alone?

    Correct answer: It increases to about four times as much

    The guide uses a squared relationship for braking distance: twice the speed means roughly four times the braking distance. This is not a promise about total stopping distance in real conditions.

    Source: Washington Commercial Driver Guide, N/10/20; section 2.6.1, physical PDF 42, printed 2-14. ↗

  8. Near freezing, the pavement looks wet but the surface may actually be a thin transparent frozen layer. What is this hazard?

    Correct answer: Black ice

    Black ice can resemble a wet roadway. Do not assume the shiny surface offers ordinary wet-road traction.

    Source: Washington Commercial Driver Guide, N/10/20; section 2.6.2, physical PDF 42, printed 2-14. ↗

  9. A car is following your truck too closely. Which change helps you avoid a sudden stop that it may not handle?

    Correct answer: Increase the space ahead and slow gradually when needed

    More space ahead lets you respond more gradually. Do not use brake-checking or increased speed to deal with a tailgater.

    Source: Washington Commercial Driver Guide, N/10/20; section 2.7.2, physical PDF 45, printed 2-17. ↗

  10. You must cross a road with a heavily loaded truck. Compared with a car, what should you plan for?

    Correct answer: A larger gap because acceleration and full clearance take longer

    A long, heavy vehicle needs time and space to accelerate and clear the entire road. Do not start unless the whole vehicle can cross safely.

    Source: Washington Commercial Driver Guide, N/10/20; section 2.7.7, physical PDF 46, printed 2-18. ↗

  11. An angry driver repeatedly gestures and tries to get ahead of your truck. What is the safest response?

    Correct answer: Give them room and avoid answering the challenge

    Avoid escalating the confrontation. Keep driving safely, create separation and let the aggressive driver move away.

    Source: Washington Commercial Driver Guide, N/10/20; section 2.10.3, physical PDF 52, printed 2-24. ↗

  12. Before climbing into a truck after freezing rain, what should you clear as well as the windows?

    Correct answer: Ice and snow from the steps, handholds and deck plates

    Icy access surfaces can cause a fall before the trip even begins. Clear them while also completing the winter vehicle checks.

    Source: Washington Commercial Driver Guide, N/10/20; section 2.13.1, physical PDF 56, printed 2-28. ↗

  13. One train has cleared a crossing with two tracks. What hazard remains before your truck proceeds?

    Correct answer: Another train may have been hidden on the second track

    Check every track and obey the crossing controls. A passing train can hide another approaching train.

    Source: Washington Commercial Driver Guide, N/10/20; section 2.15.3, physical PDF 59, printed 2-31. ↗

  14. Your truck's brakes fail on a descent and a marked escape ramp is available. What should you do?

    Correct answer: Use the ramp instead of hoping the next stretch will stop you

    Escape ramps are intended to stop runaway vehicles. Delaying after brake failure allows speed and danger to increase.

    Source: Washington Commercial Driver Guide, N/10/20; section 2.17.3, physical PDF 62, printed 2-34. ↗

  15. A loaded truck has ABS. Does that make taking a curve too fast safe?

    Correct answer: No; ABS does not prevent skids or rollover from excessive cornering speed

    ABS addresses brake-induced wheel lockup. It cannot supply extra cornering grip or cancel the effects of an excessive speed and high center of gravity.

    Source: Washington Commercial Driver Guide, N/10/20; section 2.18.8, physical PDF 64, printed 2-36. ↗

  16. Warehouse staff load and secure your truck while you complete paperwork. Does that remove your responsibility for the load?

    Correct answer: No; you still need to assure yourself it is safely distributed and secured

    The driver remains responsible for safe cargo, even when someone else performs the loading. Check securement, balance and safe access before the trip.

    Source: Washington Commercial Driver Guide, N/10/20; section 3.1, physical PDF 72, printed 3-1. ↗

  17. You change duty status after a short drive with an inspectable load. Neither 3 hours nor 150 miles has elapsed. Does the cargo rule still require a recheck?

    Correct answer: Yes; a duty-status change is a separate reexamination trigger

    The rule lists duty-status changes as well as time and distance. An applicable driver does not need to wait for the other thresholds.

    Source: 49 CFR 392.9(b)(3)(i); duty-status-change trigger, no inspection exception. ↗

  18. Too much cargo weight is shifted toward the back, leaving the front axle too lightly loaded. What can result?

    Correct answer: Reduced steering traction and unsafe directional control

    The steering axle needs suitable loading for traction and control. Moving weight rearward without checking balance can make steering unsafe.

    Source: Washington Commercial Driver Guide, N/10/20; section 3.2.4, physical PDF 73, printed 3-2. ↗

  19. Under the general tiedown-count rule, an unblocked 4-foot, 900-pound article needs at least how many tiedowns? Assume adequate strength and no special commodity rule.

    Correct answer: One tiedown

    For an article no longer than five feet and no heavier than 1,100 pounds, the unblocked general rule permits one as the count minimum. Strength and securement requirements still apply.

    Source: 49 CFR 393.110(b)(1); short/light unblocked article, general count rule. ↗

  20. Your tiedowns meet the minimum count, but their calculated aggregate WLL is below the required amount. Is the cargo ready to travel?

    Correct answer: No; both the count and strength requirements must be met

    The requirements work together. Enough tiedowns by number may still provide insufficient rated restraint for the load.

    Source: 49 CFR 393.110(a), referring to 393.106; count requirements are additional. ↗

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Question reference: wa-cdl-general-001

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Washington CDL practice

Start with 20 questions on commercial-vehicle safety and cargo. Every answer includes an explanation.

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Your general-knowledge starting point

The general question set covers selected material from sections 2 and 3: vehicle checks, control, space, weather, emergencies and cargo. Separate question sets cover air brakes (50), combination vehicles (60), passenger vehicles (40), doubles/triples (40), tank vehicles (30), school buses (60) and hazardous materials (50). They are not mixed into the general-knowledge sets. Current rules clarify selected legal requirements, including bus defect reporting, placarding and incident notification. A separate 48-question licensing question set covers permits, vehicle classes, restrictions, medical certification and entry-level training. Another 48 questions introduce inspection demonstrations, basic-control maneuvers and on-road skills. Online practice does not replace hands-on training or the official skills test.

Use the official guide collection for the current skills supplement, which replaces sections 11 and 12 of the main guide. Check DOL eligibility and transaction notices before booking; practice does not establish licensing eligibility or replace required training.

Official CDL guideGuide and current skills supplementDOL knowledge-test information