Vehicle Equipment & Safe Operation — Virginia
Virginia CDL practice test: 417 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: 179 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 | Virginia CDL permit (CLP) knowledge tests |
| Topic questions | 179 (43% of 417 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
Advertisement
Questions (179)
1. What tells you how much pressure is in your vehicle's air tanks?
- The supply pressure gauge ✓
- The ABS malfunction lamp
- The tractor protection valve
Answer: A. The supply pressure gauge
The supply pressure gauge tells you how much pressure is in your air tanks. The handbook says every vehicle with air brakes has a pressure gauge hooked to the air tank, and on a dual air brake system you get a gauge for each half of the system (or one gauge with two needles). It states plainly that these gauges show the pressure inside the air tanks. So when you want to know how much air you have in reserve, the supply pressure gauge is what you read.
2. As part of the vehicle inspection test, you will be asked to:
- Explain what you would inspect and why. ✓
- Replace an electrical fuse.
- Unload the trailer.
Answer: A. Explain what you would inspect and why.
You will be asked to name the items you inspect and explain what you would check and why. The handbook says the vehicle inspection test checks whether you know your vehicle is safe to drive. During the test you point to or touch each item, name it, and tell the examiner what you would inspect and why. That is why the correct task is explaining your inspection, not doing repair or cargo work. The handbook also recommends using the same inspection method every time so you are less likely to miss something.
3. To help prevent a rollover, cargo should be:
- Placed as high as possible inside a trailer.
- Placed as low as possible inside a trailer. ✓
- Placed on the driver’s side of a trailer.
Answer: B. Placed as low as possible inside a trailer.
Cargo should be placed as low as possible inside the trailer. The handbook ties rollover risk to the vehicle's center of gravity. When cargo is piled high, that center of gravity moves higher above the road, and the truck becomes easier to turn over. It says to keep cargo as close to the ground as possible, and that this matters even more in combination vehicles. The cargo section adds that a high center of gravity makes tipping over more likely in curves or during a swerve, and says to put the heaviest parts under the lightest parts.
4. Exhaust system parts should be:
- Leaking.
- Rubbing against other parts of the vehicle.
- Secured tightly. ✓
Answer: C. Secured tightly.
Exhaust system parts should be secured tightly, so they stay firmly mounted and do not leak or touch other parts. The handbook's inspection checklist says the exhaust system should be secure, not leaking, and not touching wires, fuel lines, or air lines. It also treats loose pipes, mufflers, tailpipes, stacks, brackets, clamps, bolts, and nuts as defects. That means the parts have to be held firmly in place. A leak or contact with other parts is something the driver should find and fix, not a normal condition.
5. Which gas would cause concern due to a faulty exhaust system?
- Oxygen
- Carbon monoxide ✓
- Nitrogen
Answer: B. Carbon monoxide
6. When parking, you should not use the parking brake if:
- The brakes are very hot. ✓
- The brakes are very cold.
- There is snow on the ground.
Answer: A. The brakes are very hot.
When parking, you should not use the parking brake if the brakes are very hot. The handbook says to use the parking brakes any time you park, with exceptions. One exception is when the brakes are very hot, such as after coming down a steep grade. The passage explains that using the parking brakes while they are hot can damage them by the heat, so you should let hot brakes cool first. The other listed exception is very wet brakes in freezing temperatures, not cold brakes by themselves or snow on the ground.
7. A CMV should:
- Not have a fire extinguisher, unless it is being used to transport hazardous materials.
- Not have a fire extinguisher, unless it will be traveling through remote areas.
- Have a fire extinguisher and other emergency equipment. ✓
Answer: C. Have a fire extinguisher and other emergency equipment.
8. Place the trailer air supply control in its "emergency" position to test:
- The trailer emergency brakes. ✓
- A coupling device.
- The anti-lock brakes.
Answer: A. The trailer emergency brakes.
Placing the trailer air supply control in the emergency position tests the trailer emergency brakes. The handbook's trailer brake check says to charge the trailer air brake system, confirm the trailer rolls freely, then stop and move the trailer air supply control to the emergency position. After that, you pull gently with the tractor and check whether the trailer emergency brakes hold. The same control is described as shutting off air to the trailer and applying those emergency brakes. That makes this the correct check for the trailer emergency brakes.
9. When coupling, you should:
- Make sure to couple the proper glad hands. ✓
- Only couple one set of glad hands.
- It is best to leave one glad hand loose.
Answer: A. Make sure to couple the proper glad hands.
When coupling, make sure you couple the proper glad hands together. When you connect the air lines, the handbook says to make sure the proper glad hands are coupled. It describes glad hands as the couplers for the service and emergency air lines, and notes that the couplers have rubber seals that keep air from escaping. To help avoid mistakes, the handbook says blue is used for service lines and red for emergency lines, and metal tags may be stamped service or emergency. That is why the correct choice is to couple the proper glad hands together.
10. Backing with a trailer is dangerous because:
- It is difficult to see behind the vehicle. ✓
- Most trucks do not have the ability to go in reverse.
- Cargo may fall out of the trailer.
Answer: A. It is difficult to see behind the vehicle.
Backing with a trailer is dangerous because it is difficult to see behind the vehicle. The handbook says that because you cannot see everything behind your vehicle, backing is always dangerous. That is why it tells you to avoid backing when you can, park so you can pull forward later, and follow safety rules like using mirrors on both sides and turning toward the driver's side when you must back.
Advertisement
Source
Last checked: 2026-10-17 · Verified from official source
Updated: · Based on the official driver handbook