General Driving Knowledge — Arizona
Arizona CDL practice test: 413 free practice questions (Based on the official driver handbook). The official format is not yet verified; check the official site before your test. General Driving Knowledge: 152 questions.
Questions that do not fit a single topic: lane use, turning, signalling and other rules of the road.
This topic page is still being reviewed against the official handbook. Until review is finished it is hidden from search engines.
| Topic / Metric | Value |
|---|---|
| Topic | General Driving Knowledge |
| License test | Arizona CDL permit (CLP) knowledge tests |
| Topic questions | 152 (37% of 413 total) |
| Review status | This topic page is still being reviewed against the official handbook. Until review is finished it is hidden from search engines. |
Official handbook
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Questions (152)
1. Air storage tanks:
- Are not allowed on a vehicle.
- Hold compressed air for the brakes. ✓
- Should be drained of excess air after every trip.
Answer: B. Hold compressed air for the brakes.
Air storage tanks hold compressed air for the brakes. The handbook says air storage tanks are used to hold compressed air, and that they carry enough air for several brake applications even if the compressor stops working. So the tanks are the supply the brakes draw from. Nothing in the passages says tanks are banned, and the draining described is about removing water and oil, not air.
2. Rims with welding repairs:
- Are not safe to be used. ✓
- Are acceptable on combination vehicles.
- Are acceptable only when traveling at speeds under 40 mph.
Answer: A. Are not safe to be used.
Rims that have had welding repairs are not safe to be used. The handbook lists wheels or rims with welding repairs among wheel and rim problems and says plainly that they are not safe. In the vehicle inspection section it repeats the rule as an inspection item: rims cannot have welding repairs. The same section explains why damaged rims matter, since a damaged wheel can cause loss of a tire or wheel, air loss, or loss of control. Nothing in the passages makes an exception for any type of vehicle or any speed.
3. A clue that your shipment contains hazardous materials is that:
- The shipper is in the business of firework or munition dealing. ✓
- The last shipment you picked up was labeled as hazardous.
- The packaging looks damaged.
Answer: A. The shipper is in the business of firework or munition dealing.
A clue that your shipment contains hazardous materials is that the shipper is in the business of dealing fireworks or munitions. The handbook lists questions to ask when checking for hazardous materials clues. One is what business the shipper is in, and it specifically names an explosives, munitions, or fireworks dealer as an example. That makes the shipper's line of business a warning sign for the current shipment. The same passage also points to tanks with diamond labels or placards, package type such as cylinders and drums, hazard class labels, proper shipping names, identification numbers, and handling precautions.
4. When a vehicle is started, the coolant temperature should:
- Decrease.
- Rise slowly. ✓
- Jump quickly.
Answer: B. Rise slowly.
When the engine is started, the coolant temperature should begin a slow, gradual climb toward its normal operating range. The gauge check in the handbook says the coolant temperature should begin a gradual rise to normal operating range once the engine starts. A slow climb shows the engine is warming up the way it should. The handbook puts this in the same start-up gauge check as oil pressure, air pressure, and the ammeter, so you are watching for a normal, steady warm-up rather than a sudden move. Nothing in the passage says the gauge should fall or spike.
5. While driving a CMV:
- You may hold a cell phone to receive a call.
- You may send text messages.
- You may not hold a cell phone to make a call. ✓
Answer: C. You may not hold a cell phone to make a call.
You may not hold a cell phone to make a call while driving a CMV; only a hands-free phone may be used for voice communication. The handbook's cell phone section says federal rules restrict CMV drivers from using hand-held mobile phones. It treats hand-held use as gripping the phone with one hand while you talk. If you choose to use a phone while driving, the handbook says only a hands-free phone kept nearby and used within the rule is allowed for voice communication. So holding the phone to make a call is the prohibited action, while a hands-free call may be allowed.
6. During a static leakage test, what is the maximum leakage rate that is safe for a double combination vehicle?
- 3 psi in one minute. ✓
- 6 psi in one minute.
- 8 psi in one minute.
Answer: A. 3 psi in one minute.
The highest safe leakage rate for a double combination vehicle is 3 psi in one minute. The air brake section describes the static leakage test this way: get the system fully charged, shut the engine off, release the parking brake, and watch how fast the gauge falls. For combination vehicles the loss must stay under three psi in one minute; single vehicles are held to two psi. So among the choices offered, three psi per minute is the largest drop that still passes. The handbook adds that if the loss is greater than the allowed amount, you should locate the leaks and repair them before driving.
7. Hanging meat as cargo is usually:
- Easy to transport.
- Dangerous, due to the possible scent.
- Unstable. ✓
Answer: C. Unstable.
Hanging meat as cargo is usually unstable, because a suspended load like beef, pork, or lamb sits high and shifts easily. The handbook describes hanging meat in a refrigerated truck as a very unstable load with a high center of gravity. Because the weight rides high, the load can shift, and the handbook says particular caution is needed on sharp curves like on ramps and off ramps. The instruction given is to go slowly in those spots. So the main thing a driver needs to know about hanging meat is that it does not sit like a flat, firmly packed load; it needs slower, smoother handling.
8. If you’re not sure what to do to extinguish a fire in your vehicle, you should:
- Use water.
- Stay inside the vehicle.
- Wait for the firefighters. ✓
Answer: C. Wait for the firefighters.
If you are unsure what to use on a vehicle fire, wait for the firefighters. The handbook says that if you are not sure what to use on a fire, especially a hazardous materials fire, wait for firefighters. It also tells you to notify emergency services of your problem and location. This answer fits because the manual gives specific extinguisher choices by fire type and warns that water can cause shock on an electrical fire or spread a gasoline fire. When the right agent is unclear, letting firefighters handle it is the safe choice the passage names.
9. Who must label hazardous materials?
- The shipper ✓
- The loader
- The driver
Answer: A. The shipper
The shipper must label hazardous materials. The handbook places packaging, marking, and labeling duties on the shipper. It says the shipper must package, mark, and label the materials and prepare the shipping papers. Another passage says shippers print required markings directly on the package, an attached label, or tag. The driver's job is to make sure the shipper has identified, marked, and labeled the hazardous materials properly. That makes the shipper the party responsible for labeling, while the driver checks that the labeling was done correctly before accepting the shipment.
10. Of the following, which is not a recommended way to spot potential signs of trouble?
- Watching the gauges
- Using your senses
- Checking critical items only at the beginning and end of a trip ✓
Answer: C. Checking critical items only at the beginning and end of a trip
Checking critical items only at the beginning and end of a trip is not a recommended way to spot potential signs of trouble. The handbook's during-trip inspection guidance lists watching gauges, using your senses (look, listen, smell, feel), and checking critical items when you stop. It does not limit checks to the start and end of a trip. Finding a defect during a trip matters because a defect can lead to a breakdown or crash. So the choice that keeps checks only at trip endpoints does not match the recommended in-trip approach.
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Last checked: 2026-10-17 · Verified from official source
Updated: · Based on the official driver handbook