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Wisconsin CDL DMV Knowledge Test Class B 1

Take 4 practice tests for CDL is the best way to prepare for your Wisconsin DMV exam is by taking our free practice tests. The following question are from real Wisconsin DMV practice test. More than 95% people pass a DMV exam when practice at DMV Practice Test.

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1. A vehicle equipped with an Anti-Lock Braking System (ABS) uses a ____ light to warn that the system is not working properly.

Anti-Lock Braking System (ABS) malfunction lamps are usually yellow. Even if the ABS isn't working properly, a driver will still have access to the vehicle's usual braking functions.

2. 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.

If your brakes are hot after coming down a steep grade, you should not use your parking brake when parking. Let your brakes cool before applying the parking brake or risk damaging the brakes.

3. If a load is 40 feet long, it should be secured by at least ____ tie-downs.

Cargo should be restrained by at least one tie-down for every 10 feet of cargo. However, all cargo should have at least two tie-downs, no matter the size of the cargo.

4. Which factor does not have an impact on a person’s blood alcohol concentration (BAC)?
The number of alcoholic drinks consumed
How quickly the alcoholic drinks were consumed
The weight of the drinker
The temperature of the drinks

The three main factors that determine a person's blood alcohol concentration (BAC) are the amount of alcohol consumed, how quickly the alcohol is consumed, and the person's weight.

5. All air tanks must include:
A drain valve.
A lock.
A trap door.
A warning sticker.

Air brake system tanks must contain drain valves. These valves are used to drain accumulated oil and water from the tanks and may be either manually or automatically operated.

6. To check the automatic transmission fluid level in some vehicles, you will have to:
Park your vehicle uphill.
Park your vehicle downhill.
Leave the vehicle running.

In some vehicles, it may be necessary to leave the engine running when checking the automatic transmission fluid level.

7. Before beginning downhill, you should:
Shift into a higher gear.
Take your vehicle out of gear.
Shift into a lower gear.
Rely only on braking to reduce your speed.

On a steep downgrade, you must use the engine's braking effect as your primary method of speed control. Be sure to decelerate and downshift appropriately before beginning to drive down the hill. Relying too heavily on the brakes may cause them to overheat and fade, becoming less effective.

8. When nearing a construction worker who is close to the road, you should:
Increase your speed.
Decrease your speed.
Not drive in any lane.
Wait until the construction is complete before proceeding.

When driving through work zones, you should make a particular point of reducing your speed when workers are on or near the road.

9. What is tire load?
The maximum air pressure of a specific tire
The maximum safe weight that a tire can carry at a specified pressure
The minimum safe weight that can be carried by a tire
The average weight of tires on a vehicle

Tire load is the maximum safe weight that can be carried by a tire at a specified pressure. This number is stated on the side of each tire.

10. Spring brakes come on:
When too much air pressure is lost.
When a control on the dashboard is activated.
When the tires have minimal tread depth.
When the brakes are noisy.

Spring brakes come on automatically when air pressure drops to an unsafe psi level. Instead of waiting for the spring brakes to automatically activate, you should safely exit the road as soon as you notice the low pressure warning signal and bring your vehicle to a stop while you are still able to control the brakes.

11. Mirror adjustment can only be checked properly if:
The trailer is straight.
There is no trailer attached to the tractor.
The vehicle is on a slight incline.
The vehicle is on a slight decline.

If a trailer is attached to a tractor, the adjustment of the vehicle's mirrors can only be checked accurately if the trailer is straight.

12. You should cover cargo:
To protect the cargo from thieves.
To protect the cargo from weather.
To prevent other drivers from looking at what is being transported.
To keep the cargo a secret.

You should cover your cargo to protect people from the cargo if it spills, as well as to protect the cargo from the weather.

13. To stop in a vehicle that uses air brakes, the driver should:
Pull the air brake lever.
Engage the brake lever.
Push the brake pedal down.
Pull the brake pedal up.

To make a normal stop in a vehicle with air brakes, push the brake pedal down. The harder the pedal is pressed, the more air pressure is released.

14. If you identify a distracted driver on the road, you should:
Follow their vehicle closely.
Try to get their attention.
Give them plenty of room.
Flash your lights at them.

If you encounter a distracted driver, make sure to give them plenty of room. Be very careful if you pass their vehicle because the driver may be unaware of your presence and drift into your lane.

15. Backing with a trailer is dangerous because:
It is difficult to see behind the vehicle.
Most trucks do not have the ability to move in reverse.
Cargo may fall out of the trailer.
There may be extra weight in the front of the trailer.

Backing up is always dangerous because it is impossible to see everything behind your vehicle. If you must drive in reverse, use a helper, if possible.

16. If you must drive in reverse, it is helpful to:
Drive as fast as possible and get it over with.
First exit the truck and walk the path to look for obstacles.
Use only the passenger side mirror.
Stick your head out the window and look backward.

If you must drive in reverse, you should first walk around the vehicle to check for hazards in your path of travel. Make frequent use of the mirrors on both sides of your vehicle while backing. Always back up as slowly as possible.

17. Friction in an S-cam brake is caused when the brake shoes and linings:
Press against the outside of the brake drum.
Press against the inside of the brake drum.
Push against each other.

Friction inside a brake drum is caused when the brake shoes and linings push against the inside of the drum. The friction in the drums will slow and stop the vehicle.

18. Which of the following is a good rule to follow when making a turn?
Honk your horn.
Use your arms to get the attention of other drivers.
Turn off your turn signal before entering the turn to avoid confusing other drivers.
Signal early.

Signal well in advance of a turn so drivers behind you are aware of your intentions. Keep the signal on throughout the turn and turn it off once the turn is complete.

19. Blocking is used to:
Prevent cargo from shifting.
Prevent cargo from being loaded too high.
Prevent cargo from being unloaded too quickly.

Blocking is used in the front, in the back, and/or on the sides of a piece of cargo to keep it from sliding while the vehicle is in motion.

20. When encountering a railroad crossing during the driving test, you should:
Pass another vehicle on the tracks if the other vehicle is moving too slowly.
Change lanes while on the tracks.
Not change gears while on the tracks.

During the on-road driving test, you must not stop, change gears, pass another vehicle, or change lanes while any part of your vehicle is in a railroad crossing.

21. Rust around wheel nuts may mean:
It has rained recently.
The nuts could be loose.
The tires should be replaced.

Rust around wheel nuts may mean that they are loose. Check the tightness of the nuts if you see any rust in the area.

22. During the driving test, the examiner will be scoring you on:
How well-spoken you are.
How quickly you arrive to your destination.
General driving behavior.

During the on-road driving test, the examiner will be score you on specific driving maneuvers as well as on your general driving behavior. You must drive in a safe and responsible manner; obey all traffic signs, signals, and laws; and not cause an accident or commit a moving violation.

23. When you leave your vehicle, you should:
Apply the parking brake.
Apply the air brake.
Not apply any brake.
Leave the door open.

Always apply the parking brake when leaving your vehicle.

24. When starting from a complete stop, a vehicle should:
Jerk forward.
Roll backwards.
Not move backwards.

To avoid hitting vehicles behind you, you must ensure that your vehicle will not roll backward when you start moving forward from a stopped position.

25. Which of the following may result in an applicant being denied a hazardous materials endorsement?
They are considered a security threat by the Transportation Security Administration (TSA).
They are a lawful U.S. citizen.
They work for a foreign company.
They do not have perfect vision.

You will be denied a hazardous materials endorsement, or lose an existing endorsement, if you renounce your U.S. citizenship; are not a lawful permanent U.S. resident; are wanted for, indicted for, or convicted of certain felonies; are judged mentally defective or are committed to a mental institution; or are deemed by the Transportation Security Administration (TSA) to pose a security threat.

26. If there are no warning gates or lights at a railroad crossing, you should:
Not worry because the tracks are likely abandoned.
Park your vehicle and walk up to the tracks to determine if a train is approaching.
Look down the tracks in both directions to ensure that no trains are approaching.
Do whatever surrounding vehicles are doing.

A passive railroad crossing is a crossing that lacks control devices, like gates or warning lights. Before crossing a passive railroad crossing, you should search the tracks for approaching trains coming from either direction.

27. If you are unsure if there is enough space for your vehicle to safely pass under an upcoming bridge, you should:
Increase your speed.
Swerve as you pass under the bridge.
Slow down.
Drive on the shoulder.

If you are not confident that your vehicle will have enough room to safely pass under an overhead object, you should slow down and seek another route, if possible.

28. Multi-speed axles and auxiliary transmissions are used:
To make a vehicle run more smoothly.
To provide extra gears.
To get improved gas mileage.
To make a vehicle less noisy.

On many vehicles, multi-speed rear axles and auxiliary transmissions are used to provide extra gears. They are usually controlled by a selector knob on the gearshift lever.

29. If mirrors are dirty before starting a trip:
They will likely become clean after driving a short distance.
It should not be a concern.
They should be cleaned before the vehicle is driven.

During a pre-trip inspection, be sure to check the mirrors and windshield for dirt and anything else that could interfere with your ability to see. Clean them as necessary.

30. Blocking a load:
Is dangerous and should never be done.
Helps stabilize the load.
Is only done with liquids.
Can only be done in dry weather.

Cargo should be blocked to prevent it from sliding around in transit. The shifting of weight in transit can make steering and handling difficult for the driver.

31. If the spring brakes are on, you should:
Not use the brake pedal.
Press the accelerator.
Move the steering wheel.

Do not use the brake pedal when the spring brakes are on. This could damage the brakes by subjecting them to the combined forces of springs and air pressure.

32. When traveling long distances, you should:
Take rest breaks.
Drive as fast as possible.
Drive through the night.

To avoid becoming fatigued on a long trip, you should take a break after every 100 miles or two hours of driving. Driving through the night, or during any other time when you would normally be asleep, raises the danger of fatigue.

33. In general, the legal maximum width of a vehicle and load is:
5 feet
6 feet
8 feet 6 inches
12 feet

In general, Wisconsin law limits the width of a vehicle (including its load) to no more than 8 feet, 6 inches.

34. When operating a vehicle with a dual brake system, a driver should:
Let the vehicle warm up before driving to ensure that fuel reaches the engine.
Wait to begin driving until the air compressor builds up a minimum pressure of 100 psi in both the primary and secondary systems.
Begin driving just after the vehicle starts.
Pump the pedal about 20 times to build pressure, then begin driving.

Before driving a vehicle with a dual air system, allow time for the air compressor to build up a minimum pressure of 100 psi in both the primary and secondary systems.

35. Hanging meat in a refrigerated truck:
Is a good way for inexperienced drivers to gain experience.
Requires a skilled driver.
Is illegal in most states.

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.

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