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Virginia CDL DMV Knowledge Test Class A 1

Take 6 practice tests for CDL is the best way to prepare for your Virginia DMV exam is by taking our free practice tests. The following question are from real Virginia DMV practice test. More than 95% people pass a DMV exam when practice at DMV Practice Test.

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Ouch! While you were on a roll there for a few questions, you didn’t pass this time. But I know this test, and I think you’ll pass next time. Really.

1. During the vehicle inspection test, you will be asked to:
Change a tire.
Explain to the examiner what you are inspecting and why.
Estimate the weight of a load on a trailer.

During the vehicle inspection test, you will be asked to do a complete inspection of your vehicle. You will need to explain what you are inspecting and why.

2. When a vehicle is started, the coolant temperature should:
Rise slowly.
Jump quickly.

After an engine is started, the coolant temperature should rise gradually to a normal operating range.

3. Exhaust system parts should be:
Rubbing against other parts of the vehicle.
Secured tightly.

When inspecting an exhaust system, you should verify that parts of the system are not loose, broken, or missing. The system's parts must be properly mounted and should not be rubbing against moving parts of the vehicle.

4. If one-fourth of the leaves in a leaf spring are missing when a vehicle is inspected:
The vehicle’s driver will be allowed to drive, but only at reduced speeds.
The vehicle will be put out-of-service until it is fixed.
The vehicle will be fine to drive since most of the spring is in place.

When inspecting a vehicle's suspension, you should look for broken or missing leaves in the leaf springs. Any defect of this kind is dangerous. If one-fourth or more of the leaves are missing from any leaf spring, the vehicle must be put out-of-service.

5. When using a fire extinguisher to put out a fire, you should:
Stay as far away as possible from the flames.
Aim at the flames.
Use any extinguisher on every type of fire.

Stay as far away from a fire as possible and aim your fire extinguisher at the source or base of the fire, not at the flames. It may be appropriate to extinguish certain fires with water. If you are unsure of how to treat a specific fire, you should wait for trained firefighters to arrive.

6. To ensure that you do not slow down traffic when driving a large truck, you should:
Switch gears while driving uphill.
Try to pass another vehicle while driving uphill.
Stay in the right lane whenever possible.

If a heavy load prevents your vehicle from keeping up with the speed of other traffic, you should stay in the right lane.

7. Hanging meat:
Should never be transported by trailer.
Can be an unstable load.
Must be approved by the Environmental Protection Agency (EPA).

An operator should drive with care when transporting a cargo of hanging meat. Such a load is unstable, both because it has a high center of gravity and because the swinging of the meat can affect the driver's handling of the vehicle.

8. While operating on a downgrade, you should brake until you reach a speed that is:
5 mph below your safe speed.
10 mph below your safe speed.
15 mph below your safe speed.

While driving downhill, you should hold down the brake pedal until your vehicle reaches a speed 5 mph below your safe speed, then release the brake pedal. Repeat this process.

9. What is the Gross Vehicle Weight Rating (GVWR)?
The weight stated by the manufacturer as the loaded weight of a single vehicle
The maximum weight that can be pulled by a vehicle
The minimum weight that can be hauled by a vehicle

A Gross Vehicle Weight Rating (GVWR) is the value specified by the manufacturer as the loaded weight of a single vehicle.

10. What can happen if the exhaust system is not working properly?
Poisonous fumes may enter the cab.
Fumes may exit the rear of the muffler system.
Proper steering may be impossible.

Leaks in an exhaust system are extremely dangerous because they may allow toxic fumes into the cab or sleeper berth, endangering drivers and passengers.

11. Hydroplaning happens most often when:
A vehicle is traveling faster than 60 mph.
Tire pressure is too low.
Tire tread is too deep.

Hydroplaning is most likely to occur when driving on wet roads with tire pressure that is too low and tire tread that is too worn. If there is enough water on the road, hydroplaning can occur at speeds as low as 30 mph.

12. If your vehicle is hydroplaning, you should:
Turn the steering wheel as hard as possible.
Not use the brakes.
Put the vehicle in reverse.

If your vehicle begins to hydroplane, do not apply the brakes. Instead, slow down by releasing the accelerator and pushing in the clutch. This will help you to regain traction.

13. Improperly loaded cargo:
Can be safer than properly loaded cargo.
Can be a hazard.
Can improve fuel efficiency.

Cargo that is improperly loaded or secured is a significant hazard to the driver, as well as others on or near the road.

14. Which of the following is not an indicator of when to upshift?
Road speed

There are two indicators that determine when you need to shift into a higher gear. One indicator is the engine speed (rpm). You should read your vehicle's manual to learn its rpm range and shift up when you reach the top of that range. The other indicator is road speed (mph). You should learn which speeds each gear can accommodate, then keep an eye on the speedometer and shift up as needed.

15. To avoid a hazard, you:
Should always come to a complete stop.
May need to swerve your vehicle out of the way.
Should change lanes without looking.

Stopping is not always the best way to avoid a hazard. If there is not enough space for you to stop to avoid coming into contact with the hazard, swerving out of the way may be your safest option.

16. Emergency brakes:
Are not required on vehicles with air brakes.
Are required only on buses.
Are required on all vehicles.

All trucks, truck tractors, and buses must be equipped with emergency brakes and parking brakes.

17. You must have an air brake endorsement:
To use a vehicle with air brakes.
To drive any truck with a trailer.
To transport hazardous materials.

You must take an air brakes knowledge test to become licensed to operate a vehicle that is equipped with air brakes, including an air over hydraulic braking system.

18. If your brakes fail when traveling downhill, decide what to do as quickly as possible because:
The longer you wait, the faster your vehicle will go.
The longer you wait, the more vehicles will get out of your way.
The longer you wait, the slower your vehicle will go.

However you choose to deal with a brake failure on a downhill slope, it is important that you make your decision as quickly as possible. The longer you wait to act, the faster your vehicle will be moving, and the harder it will become to stop.

19. When inspecting your vehicle, you should check for all of the following, except:
Too much air pressure in your tires.
Too little air pressure in your tires.
A consistent name brand across all of your tires.

During a pre-trip inspection, you should verify that the air pressure is neither too low nor too high in any of your tires.

20. When making a lane change, your turn signal:
Should always be used.
Should only be used if there is traffic present.
Should only be used between dusk and dawn.

You must always properly signal before turning or changing lanes.

21. When starting your vehicle, the coolant temperature should:
Not change.
Increase gradually.
Quickly jump from low to high.

Watch the gauges in your vehicle before starting a trip. After starting your vehicle's engine, the coolant temperature should begin a gradual rise to the normal operating range.

22. Hydroplaning:
Rarely happens to trucks.
Usually happens when vehicles are traveling at speeds above 65 mph.
Can occur with a minimal amount of water on the roadway.

Hydroplaning is an effect in which a vehicle's tires lose traction with the surface of the road and instead glide along a layer of water. There does not have to be a large amount of water on the road for this to occur. Hydroplaning can begin at speeds as low as 30 mph.

23. What is the number one cause of death and injury in a work zone?
Drivers speeding
Slow drivers
Animals crossing the road

Speeding is the leading cause of death and injury in work zones. Use extra caution when driving near workers in a work zone.

24. The two markings on a front brake limiting valve usually read:
"Normal" and "slippery."
"Low" and "high."
"Left" and "right."

Some vehicles with air brake systems manufactured before 1975 have a front brake limiting valve with "normal" and "slippery" settings.

25. Which gas would cause concern due to a faulty exhaust system?
Carbon monoxide

A leaking exhaust system can introduce carbon monoxide, which is poisonous, into the cab or sleeper berth.

26. While driving, ____ generally holds spring brakes in place.
Air pressure

While driving, spring brakes are generally held in place by air pressure. If the air pressure gets low enough, the springs will activate the brakes.

27. A poor balance of weight in a trailer:
Can make handling unsafe.
Improves traction.
Increases fuel efficiency.

Poorly balanced weight in a trailer can make handling unsafe. For example, either too little or too much weight on the front axle can make a vehicle difficult to steer. Weight should be distributed evenly from front to back and from side to side. It should be distributed as low as possible.

28. Which of the following does not indicate bad brakes?
Cracked drums
Pads free of oil or grease
Very thin shoes

When inspecting your brakes, you should check for cracked drums; shoes or pads covered in oil, grease, or brake fluid; and shoes that are missing, broken, or worn dangerously thin.

29. Which of the following is not a sign of fatigue?
Difficulty focusing, with frequent blinking
Yawning repeatedly or rubbing eyes
Staying in your lane

Potential warning signs of fatigue include difficulty focusing, frequent blinking, or heavy eyelids; yawning repeatedly or rubbing your eyes; daydreaming; wandering or disconnected thoughts; trouble remembering the last few miles you've driven; missing exits or traffic signs; having trouble keeping your head up; drifting from your lane; following too closely; hitting a shoulder rumble strip; or feeling restless and irritable.

30. Why do large vehicles use air brakes?
Other brake systems squeak too loudly.
Air brakes are very effective systems.
Other braking systems are hard to come by.

If used and maintained properly, air brakes are a safe and effective way to stop large, heavy vehicles.

31. Exhaust system parts should:
Rub against the fuel system.
Rub against tires.
Not leak.

It is essential that exhaust system parts are not leaking or otherwise broken. A faulty exhaust system can let poisonous fumes into the cab or sleeper berth.

32. 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.

While regular mirror checks should be part of your normal driving routine, checking your mirrors is especially important when turning, changing lanes, merging, and performing tight maneuvers.

33. If planning to back a vehicle where there may be overhanging objects, a driver should:
Cut wires or branches as necessary.
Inspect the area before backing.
Not worry about the obstacles.

Because you can't see everything behind you, driving in reverse is always dangerous and should be done only when necessary. Before backing into an area, you should exit your vehicle and inspect the path of travel to check for potential hazards, especially overhanging objects that would otherwise be difficult to spot in a mirror.

34. Dual tires should:
Always come into contact with one another.
Come into contact with one another fairly regularly.
Not come into contact with one another.

When inspecting a vehicle, you should verify that your dual tires do not come into contact with one another, or with any other part of the vehicle.

35. If a truck is equipped, a trailer brake hand valve can be used to:
Add fuel to the truck.
Prevent the truck from rolling back when being started from a stop.
Check the engine oil level.

If a tractor-trailer is so equipped, the trailer brake hand valve can be used to stop the vehicle from rolling back when being started from a stop.

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