Vehicle Equipment & Safe Operation — Nebraska
Nebraska CDL practice test: 476 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 | Nebraska CDL permit (CLP) knowledge tests |
| Topic questions | 213 (45% of 476 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. An Anti-Lock Braking System (ABS):
- Is not available for vehicles with air brakes.
- Is not helpful in most driving situations.
- Can help you maintain control when braking. ✓
Answer: C. Can help you maintain control when braking.
An Anti-Lock Braking System (ABS) can help you maintain control when braking. The handbook explains that hard braking on slippery surfaces without ABS can lock up your wheels, and locked steering wheels mean you lose steering control; locked wheels elsewhere can cause a skid or spin. ABS prevents that lock up, so you keep control and can steer around an obstacle while braking. The handbook also notes ABS may or may not shorten your stopping distance, so the point is control, not faster stops.
2. Air brakes use ____ to function.
- Compressed air ✓
- Liquid nitrogen
- Carbon dioxide
Answer: A. Compressed air
Air brakes use compressed air to function. The handbook states plainly that air brakes use compressed air to make the brakes work. It also describes how the compressor governor pumps air into the storage tanks, which hold compressed air and keep enough of it to let you apply the brakes several times even if the compressor quits. That stored, pressurized air is what applies the brakes, so the system depends on compressed air rather than any other gas.
3. When you press the brake pedal in a vehicle with S-cam brakes, air pressure pushes out the rod and moves the:
- Slack adjuster. ✓
- Axle.
- Brake drum.
- Alcohol evaporator.
Answer: A. Slack adjuster.
When you press the brake pedal in an S-cam brake system, air pressure pushes the rod out and moves the slack adjuster. The handbook describes the s-cam sequence at the wheel. Pushing the pedal lets air into the brake chamber. That air pressure pushes the push rod outward. The rod is connected to the slack adjuster, so the adjuster moves; it then twists the brake camshaft and turns the s-cam. The s-cam spreads the brake shoes against the drum. The slack adjuster is the part moved by the rod in this chain, which is why it is the correct choice.
4. To use the controlled braking method, you should:
- Apply the brakes as hard as possible without locking the wheels. ✓
- Apply the brakes with about half-force.
- Apply the brakes until the wheels lock.
- Pump the brakes.
Answer: A. Apply the brakes as hard as possible without locking the wheels.
To use controlled braking, brake firmly but not so hard that the wheels lock. The handbook describes controlled braking as braking firmly, just short of locking the wheels, while keeping steering movements small. If the wheels lock or you need a bigger steering correction, you release the brakes and re-apply as soon as you can. That is why the correct choice is firm braking without wheel lock: the method is meant to keep the vehicle straight and still allow steering if needed.
5. Placarded vehicles must carry fire extinguishers with a minimum rating of:
- 10 B:C. ✓
- 20 C.
- 10 A:B.
- 5 B:C.
Answer: A. 10 B:C.
Placarded vehicles must carry a fire extinguisher rated at least 10 B:C. The handbook says the power unit of a placarded vehicle must have a fire extinguisher with a UL rating of 10 B:C or more. That makes 10 B:C the minimum rating, not just one possible choice. The driving-safely section also describes B:C extinguishers as made for electrical fires and burning liquids, which fits the kind of hazard the rule addresses. So the correct choice is the one giving 10 B:C.
6. When starting the engine of a truck with a trailer, how can you tell if the Anti-Lock Braking System (ABS) is not working?
- The yellow light on the rear of the trailer will stay on. ✓
- The red light on the trailer will flash three times and then stay on.
- All the rear lights on the trailer will flash and then shut off.
- The blue light near the driver's door will light.
Answer: A. The yellow light on the rear of the trailer will stay on.
You can tell the trailer ABS is not working when the yellow light on the left rear of the trailer stays on. The handbook says that for a trailer, the ABS warning is a yellow light on the left rear. During start-up checks, that lamp should come on briefly and then go out; if it stays on, the ABS is not working properly. The trailer ABS warning is also described as a yellow malfunction lamp on the left side, and a lamp that remains on after the bulb check can mean ABS control is lost at one or more wheels. That is why a yellow trailer light that stays on is the reliable sign.
7. When stopping, the brake pedal should be:
- Pressed down gradually. ✓
- Pressed down quickly.
- Pressed down repeatedly, but not held down continuously.
Answer: A. Pressed down gradually.
When you stop, press the brake pedal down gradually, controlling the pressure so the vehicle comes to a smooth, safe stop. The handbook's stopping section tells you to push the brake pedal down gradually, not all at once. It explains that how much brake pressure you need depends on your speed and how quickly you have to stop, so you control the pressure to bring the vehicle to a smooth, safe stop. If you have a manual transmission, it also says to push the clutch in when the engine is close to idle. Nothing in the stopping section calls for a fast stab at the pedal or for pumping it.
8. When inspecting cargo, the driver should do all of the following, except:
- Ensure that the truck is not overloaded.
- Ensure that the cargo is balanced.
- Ensure that the cargo is secured properly.
- Ensure that the breakable items are placed under heavier items. ✓
Answer: D. Ensure that the breakable items are placed under heavier items.
9. If a tire fails, you should:
- Use the brakes.
- Stay off the brakes. ✓
- Swerve.
- Wave your arms at other drivers.
Answer: B. Stay off the brakes.
If a tire fails, stay off the brakes while you keep a firm grip on the steering wheel. The handbook's tire-failure response tells you to hold the wheel firmly with both hands and stay off the brake. It acknowledges that braking is a natural emergency reaction, but says doing so after a tire failure may make you lose control. Unless you are about to hit something, wait until the vehicle slows before braking gently, pulling off the road, and stopping. That is why staying off the brakes is the listed response.
10. Improperly loaded cargo can:
- Look bad to other drivers.
- Hurt or kill the driver during a quick stop. ✓
- Make it easier to stop a vehicle.
Answer: B. Hurt or kill the driver during a quick stop.
Improperly loaded cargo can hurt or kill you during a quick stop or crash. The handbook says loose cargo can hurt or kill the driver during a quick stop or a crash. It also warns that loading cargo wrong or failing to secure it endangers others and yourself, and that poor loading can affect steering and make the vehicle harder to control. The point is that the cargo becomes a hazard inside the cab when you stop suddenly, so securing it is part of your responsibility even if someone else loaded it.
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Last checked: 2026-10-17 · Verified from official source
Updated: · Based on the official driver handbook