Vehicle Equipment & Safe Operation — Wyoming
Wyoming CDL practice test: 459 free practice questions (Based on the official driver handbook). The official format is not yet verified; check the official site before your test. Vehicle Equipment & Safe Operation: 213 questions.
Brakes, tires, lights, mirrors, seat belts, child seats and basic vehicle control.
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 | Vehicle Equipment & Safe Operation |
| License test | Wyoming CDL permit (CLP) knowledge tests |
| Topic questions | 213 (46% of 459 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
Not yet verified
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Questions (213)
1. When traveling down a steep downgrade:
- The air brakes should be used.
- The vehicle should be placed in a low gear and the driver should use engine braking. ✓
- The driver should continually downshift instead of using the brakes.
Answer: B. The vehicle should be placed in a low gear and the driver should use engine braking.
On a steep downgrade, you should place the vehicle in a low gear and use engine braking, with the brakes only as a supplement. On a long or steep downgrade, the handbook says the brakes are only a supplement to the engine's braking effect. You first get the vehicle into the proper low gear, then use the brakes in a controlled way to keep speed near a safe speed. That is why the low-gear and engine-braking choice fits: the engine does most of the speed control, and the brakes help rather than carry the whole job. The handbook also warns that brakes can fade if they get too hot from overuse.
2. Which of the following is not a reason to use your mirrors?
- You are changing lanes.
- You are making a turn.
- You are looking at fuel prices. ✓
Answer: C. You are looking at fuel prices.
Looking at fuel prices is not a reason to use your mirrors. The handbook treats mirrors as a driving tool: you glance in them quickly, look back and forth between the mirrors and the road ahead, and never stare at them, because focusing on a mirror too long means you cover distance without knowing what is happening in front of you. It also mentions checking the mirrors for signs of smoke from tires or the vehicle. Watching prices at the roadside has nothing to do with either job, and it would pull your attention away from the road in exactly the way the handbook warns against.
3. The leakage rate for a single vehicle with air brakes should be no more than ____ in one minute during a static leakage test.
- 1 psi
- 2 psi ✓
- 3 psi
Answer: B. 2 psi
4. When loading a trailer, it is important to:
- Place as little weight as possible over the axles.
- Place an appropriate amount of weight over the axles. ✓
- Not be concerned with how the cargo's weight is distributed.
Answer: B. Place an appropriate amount of weight over the axles.
When loading a trailer, place an appropriate amount of weight over the axles so the load stays within legal limits and remains balanced. The handbook says you must keep weights within legal limits, including axle weights, and that poor weight balance makes handling unsafe. It warns that too much weight on the steering axle can make steering hard, while too little weight on the front axle can make steering unsafe, and too little weight on the driving axles can reduce traction. Loading an appropriate amount over the axles supports both legal weight limits and safer balance.
5. Radial and bias-ply tires:
- Should be used together on all axles.
- Should be used together, but only on the rear axle.
- Should not be used together. ✓
Answer: C. Should not be used together.
Radial and bias-ply tires should not be used together. The handbook lists radial and bias-ply tires used together among the tire conditions to check for, right alongside mismatched sizes and tire damage. That means mixing these two tire types is treated as a problem, not a normal setup. The bank answer matches that by saying the two types should not be used together.
6. When checking tire condition during the vehicle inspection, you should:
- Ensure that the insides of the tires are more worn than the outsides of the tires.
- Ensure that the outsides of the tires are more worn than the insides of the tires.
- Ensure that the middles of the tires are more worn than the outsides of the tires.
- Ensure that the tires have even wear. ✓
Answer: D. Ensure that the tires have even wear.
7. When checking your mirrors:
- The passenger side mirror should not be used.
- The driver's side mirror should not be used.
- Mirrors on both sides of the vehicle should be used. ✓
Answer: C. Mirrors on both sides of the vehicle should be used.
When checking your mirrors, you should use the mirrors on both sides of the vehicle. The handbook directly tells you to use mirrors on both sides and to check the outside mirrors on both sides often. That instruction does not set aside either mirror; it applies to checking your mirrors, including when backing. The bank answer is the choice that says both mirrors should be used, so it matches the handbook's stated rule.
8. If corrosive materials leak in the trailer, the trailer should be:
- Cleaned with acid.
- Cleaned with water. ✓
- Left to air-dry without washing.
- Cleaned with bleach.
Answer: B. Cleaned with water.
The trailer should be cleaned with water — any part of the vehicle exposed to a corrosive liquid has to be thoroughly washed with water. The hazardous materials section covers Class 8 corrosive materials directly. It says that when corrosives spill or leak during transportation, parts of the vehicle that were exposed to the corrosive liquid must be thoroughly washed with water. It also says the interior should be washed out as soon as possible after unloading, before you reload. So plain water is the required cleaning agent, not a chemical you pick yourself.
9. A tread depth of ____ should be in every major groove of a front tire.
- 1/32 of an inch
- 2/32 of an inch
- 4/32 of an inch ✓
Answer: C. 4/32 of an inch
A front tire should have at least 4/32 of an inch of tread depth in every major groove. The handbook says front tires must carry a minimum of 4/32 inch of tread in each main groove; all other tires need 2/32 inch. The inspection section repeats the same split, with 4/32 for steering axle tires and 2/32 for the rest. So the front-tire figure asked for is 4/32 of an inch.
10. If a load is placed on one side of a trailer, the trailer:
- May lean during turns. ✓
- May add extra support during turns.
- May be easier to steer during turns.
Answer: A. May lean during turns.
A load placed on one side of a trailer may make the trailer lean during turns. The handbook's combination-vehicle section warns that cargo should stay centered. When weight sits to one side and makes the trailer lean, the rig is more likely to roll over. It also says to keep cargo low and drive slowly around turns. So an off-center load is a stability problem, and leaning during turns is the result described by the handbook.
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Last checked: 2026-10-17 · Verified from official source
Updated: · Based on the official driver handbook