Arizona CDL — General Knowledge practice
Arizona 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
16 questions · pass with 13 correct. You get instant feedback and an explanation after every answer.
Study questions with answers
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.
Show all 12 questions with answers
1. With low-beam headlights, about how far ahead can you expect to see at night?
Correct answer: About 250 feet
Low beams light roughly 250 feet of road while high beams reach about 350 to 500 feet, so slow enough to stop within the distance your lights show.
Source: Arizona CDL Manual — Section 2: Driving Safely
2. What headlight setting gives the best visibility when you must drive through fog?
Correct answer: Low beams
Low-beam headlights, aided by fog lights, cut through fog better than high beams, which reflect off the moisture and worsen glare — use them even in daytime fog.
Source: Arizona CDL Manual — Section 2: Driving Safely
3. How much steering-wheel free play is enough to make a vehicle hard to steer?
Correct answer: More than about 10 degrees
Play beyond roughly 10 degrees — about two inches of travel measured out at a standard 20-inch wheel's rim — signals a steering problem that makes control difficult.
Source: Arizona CDL Manual — Section 2: Driving Safely
4. How do you test hydraulic brakes for a leak before a trip?
Correct answer: Pump the pedal three times, then hold firm pressure for five seconds and watch that it does not sink
Pumping the pedal three times and then pressing firmly for five seconds should hold steady; if the pedal drifts down, there is likely a leak to fix before driving.
Source: Arizona CDL Manual — Section 2: Driving Safely
5. In winter, a lack of spray coming off other vehicles' tires is a sign of what?
Correct answer: That ice has formed on the road
When wheels stop throwing up spray, the surface moisture has frozen — a warning that the road has iced over even if it still looks wet.
Source: Arizona CDL Manual — Section 2: Driving Safely
6. How far ahead does the manual advise a good driver to look while driving?
Correct answer: About 12 to 15 seconds
Skilled drivers scan roughly 12 to 15 seconds down the road — about a block at low speed and a quarter mile at highway speed — while still watching what is close.
Source: Arizona CDL Manual — Section 2: Driving Safely
7. Within what distance of an oncoming vehicle must you dim your high beams?
Correct answer: 500 feet
Switch to low beams before you get within 500 feet of an approaching vehicle, and also when following another vehicle within that same distance.
Source: Arizona CDL Manual — Section 2: Driving Safely
8. Why should you take the ignition key with you during the walk-around inspection?
Correct answer: So no one can move the vehicle while you are around or under it
Pocketing the key ensures the vehicle cannot be started or moved while you inspect it, protecting you as you work around and beneath it.
Source: Arizona CDL Manual — Section 2: Driving Safely
9. After the engine starts, how quickly should air pressure climb from 50 to 90 psi?
Correct answer: Three minutes
Watch the gauge climb from 50 to 90 psi inside about three minutes, then continue to the governor cut-out, typically around 120 to 140 psi.
Source: Arizona CDL Manual — Section 2: Driving Safely
10. Which set of items counts as required emergency equipment on a commercial vehicle?
Correct answer: A fire extinguisher, spare fuses, and warning devices such as reflective triangles
Vehicles must carry a properly rated fire extinguisher, spare electrical fuses (unless they use circuit breakers), and warning devices like three reflective triangles.
Source: Arizona CDL Manual — Section 2: Driving Safely
11. Why turn a retarder off on wet, icy, or snowy pavement?
Correct answer: It can make the drive wheels skid on slippery pavement
On slick surfaces a retarder can rob the drive wheels of traction and start a skid, so shut it off any time the surface is wet, icy, or snow-packed.
Source: Arizona CDL Manual — Section 2: Driving Safely
12. How do objects appear when viewed in a convex (fisheye) mirror?
Correct answer: Smaller and farther away than they really are
Convex mirrors widen your view but shrink the image, so vehicles look smaller and seem more distant than they actually are — allow for that when judging distance.
Source: Arizona CDL Manual — Section 2: Driving Safely
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Every Arizona question is written from the official Arizona driver handbook and checked against its current edition. DMV Test Free is a free, independent study resource — not affiliated with any DMV or government agency. About DMV Test Free