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Alabama CDL DMV Knowledge Test Class B 2

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

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1. Sending text messages while driving:
May be done if the messages are short.
Is encouraged.
Is permitted if you are asking a question of your employer.
Is not permitted.

Sending and reading text messages while driving is prohibited.

2. What is sleep debt?
When you fall behind on sleep
When you want to take a nap
Excess sleep
The amount of time it takes to get ready to drive after sleeping

You can build up a "debt" of sleep if you do not sleep for adequate amounts of time. You can only catch up on the time that you "owe" by getting more sleep.

3. Pressing and releasing a brake pedal unnecessarily can:
Release air faster than it can be replaced.
Add more air to the braking system.
Make the brake pedal more sensitive.
Create a loud noise.

In an air brake system, pressing and releasing the brake pedal unnecessarily can release air from the braking system faster than the compressor can replace it.

4. A modulating control valve can control the:
Spring brakes.
Landing gear.
Air brakes.
Anti-lock braking system (ABS).

A modulating control valve allows a driver to gradually apply spring brakes. In equipped vehicles, the valve is controlled by a lever located on the dashboard.

5. During a vehicle inspection, be sure that:
The emergency exits are difficult to open.
The emergency exit warning devices work properly.
The emergency exits squeak.
The emergency exits are not accessible from inside the cab.

During the vehicle inspection test, you must ensure that any emergency exit warning devices are working. All emergency exits should operate smoothly, be undamaged, and close securely from the inside.

6. When backing, a helper:
Should be used whenever possible.
Often adds to the confusion of backing.
Should only be used if the driver is not feeling confident.
Would likely get in the way.

Backing up is always dangerous because you cannot see everything behind your vehicle. Whenever possible, use a helper who can monitor your blind spots.

7. During a pre-trip inspection, what is the best method for checking your lights?
Parking near a mirror to look for a reflection
Activating the lights, then exiting the vehicle to check
Looking on the instrument panel to see if any warning lights are illuminated
Driving in traffic and waiting for other drivers to let you know your lights are out

During a pre-trip inspection, you should activate your lights, then get out of the vehicle to look at them.

8. Which of the following is not a crime that would disqualify an applicant from a hazardous materials endorsement?

There are a number of crimes that will disqualify a person from receiving a hazardous materials endorsement for seven years. Among these offenses are arson, robbery, and crimes of dishonesty, fraud, or misrepresentation. More serious crimes, such as murder, result in a lifetime disqualification.

9. 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.

10. A high center of gravity:
Makes a vehicle more susceptible to rollover.
Is encouraged in inclement weather.
Is required on some roads.
Improves fuel efficiency.

A high center of gravity makes a vehicle more likely to tip over.

11. After an accident, flares should be used with caution because:
There may be fuel spilled on the ground that could catch fire.
Other drivers may not see the flares if the weather is sunny.
Flares are expensive.

A common cause of vehicle fires in the aftermath of an accident is the improper use of flares near spilled fuel. Use flares with caution.

12. When driving in fog, you should:
Slow down.
Speed up.
Drive on the shoulder.

It is best not to avoid driving in fog. However, if you must drive under foggy conditions, be sure to decrease your speed.

13. 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.

14. If there is a fire in your vehicle, you should not:
Park in an area away from buildings, trees, brush, and other vehicles.
Pull into a service station.
Notify emergency services of your problem and your location.

In the event of a vehicle fire, you should leave the road and stop in an open area. Do not pull into a service station as fuels at the service station could catch fire. Report the fire and your location to emergency services.

15. 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.

16. How do ice cream trucks become hazardous to other drivers?
Ice cream trucks must be kept cold.
Children often run toward an ice cream truck without looking for other traffic.
Ice cream trucks leave trails of water and ice on the roadway.

Ice cream trucks can create hazardous conditions for other drivers because they attract children. Children often do not notice or pay attention to other vehicles on the roadway when running to or from ice cream trucks.

17. If your brakes fail on a downgrade, your best hope to stop is to:
Use an escape ramp.
Use the shoulder.
Drift to a stop.

If your brakes fail on a downgrade, you will have to look outside your vehicle for a way to stop. Using an escape ramp is the safest way to stop your vehicle.

18. You may be an aggressive driver if you:
Expect delays on your drive.
Slow down and maintain a reasonable following distance.
Make hand gestures that could anger other drivers.

Avoid being an aggressive driver by being realistic about your travel time, making allowance for delays, maintaining reasonable following distances, and not making hand gestures that could anger another driver.

19. When an engine is started:
The brakes should be locked up.
Warning lights should come on and then quickly turn off.
The coolant temperature will decrease.
The hood must be open.

After a vehicle is started, the warning lights and buzzers should go out after a few seconds. If the warning signals do not turn off, there may be something wrong with the vehicle.

20. Which of the following is not a good rule when using turn signals?
Signal early. Signal well before a turn or lane change.
Signal continuously. Do not cancel a signal until the turn is completed.
Don’t over-signal. If no one is near you, there is no need to signal.

When using your turn signals, you should signal well before the turn or lane change, signal continuously throughout the turn or lane change, and cancel the signal after you have completed your move.

21. Drowsy driving is most common during:
The night.
The early morning.
The mid-afternoon.

Drowsy driving is most common during the night because people are naturally prone to be less alert in the hours during which they are normally asleep. If you must drive at night, take every precaution to prevent fatigued driving.

22. A driver can have:
Two licenses, one for automobiles and one for trucks.
Only one license.
A license for each state in which they plan to drive.
An automobile license from one state and a CDL from another.

A person cannot have more than one license. States share driver data through a computer database to prevent the issuance of duplicate licenses.

23. If you are convicted of a traffic violation:
The State will inform your employer.
You must tell your employer.
You must tell the shipper.

If you are convicted of any kind of traffic violation, in any type of vehicle, you must notify your employer within 30 days. You must also inform your motor vehicle licensing agency of the violation within 30 days if the conviction happened in another jurisdiction. This rule does not apply to parking infractions.

24. The radiator cap:
Should not be removed when the coolant is hot.
Can be removed when the coolant is hot.
Should be cool to the touch under normal driving conditions.

Never remove the radiator cap or any part of the pressurized cooling system until it has cooled. Opening the cap while the system is too hot could release steam and boiling water that could severely burn you. If the radiator cap is cool to the touch, the system is likely cool enough for you to open the cap.

25. When backing with a trailer, you should begin by:
Turning the steering wheel in the direction of the turn.
Turning the steering wheel in the direction opposite of the turn.
Turning the wheel as sharply as possible.

When backing with a trailer, begin by turning the steering wheel in the direction opposite of the turn. Once the trailer starts to turn, reverse the direction of the steering wheel to follow the trailer.

26. Header boards:
Should never be used.
Protect drivers from being hit by cargo.
Protect drivers' heads when they are entering the cab of a truck.

A header board protects a driver from moving cargo in the event of a crash or emergency stop.

27. Rims with welding repairs:
Are unsafe.
Are acceptable on tires in the rear of the vehicle.
Are acceptable only when carrying a heavy load.
Are acceptable in combination vehicles.

A driver should inspect wheels before a drive, specifically looking for damage on the wheels and rims. Wheels or rims that have had welding repairs are not safe for use.

28. As part of a pre-trip inspection, you should look for all of the following, except:
Tires with too much air pressure.
Tires with too much wear.
Tires made by different manufacturers.

When inspecting your tires, verify that there is tread depth of at least 4/32 of an inch in every major groove on the front tires and tread depth of at least 2/32 of an inch in grooves on the other tires. Be sure that your tires are not too worn, are not cracked, have proper air pressure, and are all equally sized.

29. During the straight line backing exercise, how many times are you permitted to exit the vehicle to check its position?
One time
Two times
Three times
Four times

During the straight line backing exercise, you are permitted to exit your vehicle to check its position no more than one time.

30. When double clutching, if you remain in neutral for too long and can’t get your vehicle into the next gear, you should:
Stop the vehicle and start over.
Return to neutral, release the clutch, increase your speed, and try again.
Skip over your intended gear and move into the next gear.
Just keep the vehicle in neutral.

If you stay in neutral for too long while double clutching and have difficulty switching your vehicle into the next gear, don't force it. Return to neutral, release the clutch, increase the engine speed to match road speed, and try again.

31. What is traction?
Friction between the tires and road
Tires' rates of rotation
The length of time needed to activate the brakes

Traction is friction between your tires and the surface of the road. Adequate traction is necessary for braking and steering.

32. Of the following, which is not a recommended way to spot potential signs of trouble?
Watching the gauges
Using your senses
Checking critical items only at the beginning and end of a trip

During a trip, you should regularly make checks to ensure that your vehicle is operating properly. Check the instrument panel and gauges; look at your mirrors; and examine the tires, cargo, and lights. Use all of your senses and be alert for anything that could be an early indication of trouble.

33. When traveling in heavy traffic, the safest driving speed is:
The posted speed limit.
The speed of surrounding traffic.
A speed much slower than the flow of surrounding traffic.

In heavy traffic, it is safest to match the speed of surrounding vehicles. Vehicles traveling in the same direction at the same speed are unlikely to collide. However, you should not exceed legal speed limits.

34. When near a railroad crossing:
You should expect to hear every approaching train.
You may not hear a train, even if one is approaching.
You will hear two short blasts of a train's horn if a train is approaching.

You should never assume that you will hear an approaching train. The train operator may fail to sound the horn, or the use of a train's horn may be prohibited in a specific area. Even if the train does sound its horn, noise from inside your own vehicle may prevent you from hearing the train until it is dangerously close.

35. If something is found to be unsafe during a pre-trip inspection, you should:
Continue with the trip and make an appointment with a mechanic after the trip is completed.
Let a more experienced driver use the truck.
Get the issue fixed immediately.
Not use the items found to be unsafe, but may continue driving normally.

If a pre-trip inspection reveals anything unsafe about your vehicle, you must get it repaired. It is illegal to operate an unsafe vehicle.

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