Washington CDL — General Knowledge practice
Washington CDL — General Knowledge: Safe Driving Practices practice test
Following distance, scanning, blind spots, using your lights, and the habits that prevent crashes and keep you in control.
Content reviewed against official driver handbooks · August 12, 2026
14 questions · pass with 11 correct. You get instant feedback and an explanation after every answer.
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12 sample Safe Driving Practices questions with the correct answer, a short explanation, and the official handbook reference. Read through them, then take the quiz above.
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1. How should you hold the steering wheel to keep control if you hit a curb or pothole?
Correct answer: Firmly with both hands on opposite sides of the wheel
Hold the wheel firmly with both hands on opposite sides so it cannot be pulled from your grip by a curb or pothole.
Source: Washington CDL Guide — Section 2: Driving Safely (Steering)
2. Double clutching is required to change gears in which type of heavy-vehicle transmission?
Correct answer: An unsynchronized manual transmission
Most heavy vehicles with unsynchronized manual transmissions require double clutching to shift gears.
Source: Washington CDL Guide — Section 2: Driving Safely (Manual Transmissions)
3. What is the correct speed and gear for backing a large vehicle?
Correct answer: Back slowly in the lowest reverse gear
Always back as slowly as possible using the lowest reverse gear so you can correct steering errors and stop quickly.
Source: Washington CDL Guide — Section 2: Driving Safely (Backing Safely)
4. When you must back a commercial vehicle, which direction is safest to back and turn toward?
Correct answer: Toward the driver's side so you can see better
Back toward the driver's side whenever possible so you can watch the rear of the vehicle out the side window.
Source: Washington CDL Guide — Section 2: Driving Safely (Backing Safely)
5. You are stopped on an upgrade in a manual-transmission vehicle. What keeps you from rolling back as you pull away?
Correct answer: Partly engage the clutch before releasing the brake
Partly engage the clutch before taking your foot off the brake, and use the parking brake as needed until you have enough power.
Source: Washington CDL Guide — Section 2: Driving Safely (Accelerating)
6. How far ahead do good drivers generally look while driving?
Correct answer: At least 12 to 15 seconds ahead
Most good drivers look at least 12 to 15 seconds ahead, which is the distance they will travel in that time.
Source: Washington CDL Guide — Section 2: Driving Safely (Seeing Ahead)
7. When the road is wet, icy, or snow-covered, what should you do with a speed retarder?
Correct answer: Turn it off to avoid a drive-wheel skid
Turn the retarder off on wet, icy, or snowy roads because it can cause the drive wheels to skid.
Source: Washington CDL Guide — Section 2: Driving Safely (Retarders)
8. How can an automatic transmission help you control speed on a downgrade?
Correct answer: Select a low range for more engine braking
You can select a low range to get greater engine braking on downgrades, which prevents the transmission from shifting up past the chosen gear.
Source: Washington CDL Guide — Section 2: Driving Safely (Automatic Transmissions)
9. How do objects appear when viewed in a convex ('fisheye') mirror on a large vehicle?
Correct answer: Smaller and farther away than they actually are
Convex mirrors show a wider area, but objects appear smaller and farther away than they really are.
Source: Washington CDL Guide — Section 2: Driving Safely (How to Use Mirrors)
10. At highway speeds, roughly how much distance does looking 12 to 15 seconds ahead cover?
Correct answer: About a quarter of a mile
At highway speeds, 12 to 15 seconds of travel is about a quarter of a mile ahead.
Source: Washington CDL Guide — Section 2: Driving Safely (Seeing Ahead)
11. Before you begin backing with a helper, what is the most important thing to agree on?
Correct answer: A hand signal that means 'stop'
Work out hand signals you both understand before backing, and especially agree on a signal that means 'stop.'
Source: Washington CDL Guide — Section 2: Driving Safely (Backing Safely)
12. When traction is poor because of rain or snow, how should you use the accelerator?
Correct answer: Speed up very gradually to avoid wheel spin
Speed up very gradually when traction is poor; too much power can make the drive wheels spin and cause a loss of control.
Source: Washington CDL Guide — Section 2: Driving Safely (Accelerating)
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