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Maryland CDL DMV Knowledge Test Class A 1

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

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1. Which of the following is not a strategy to avoid becoming an aggressive driver?
Not expecting delays on a drive
Maintaining a reasonable following distance
Keeping your hands on the wheel
Avoiding gesturing at other drivers

Strategies to avoid becoming an aggressive driver include having realistic expectations about your travel time and the possibility of delays; driving an appropriate speed and keeping a reasonable following distance; avoiding gesturing at other drivers; and keeping your hands on the wheel.

2. When transporting a load, you should inspect the cargo:
Only before starting to drive.
At the end of each day.
Every time you take a break.

Cargo and its securement must be inspected every time you take a break during a trip. Be sure to inspect the cargo at least every 150 miles.

3. If approaching a railroad crossing while driving a placarded vehicle, you should always:
Activate your four-way flashers.
Stop within five feet of the tracks.
Change gears while on the tracks.
Change lanes while on the tracks.

If approaching a railroad crossing while driving a transit bus, school bus, or placarded vehicle, special procedures apply. Before crossing, stop your vehicle within 50 feet of, but not less than 15 feet from, the nearest rail. Activate your four-way flashers while crossing. Do not stop, change gears, or change lanes while any part of your vehicle is proceeding across the tracks.

4. If the spring brakes are activated, you should never:
Push down the brake pedal.
Open the hood.
Release air from the air storage tanks.
Open the door to the cab.

Never apply the brake pedal if your spring breaks are activated. Brakes can be damaged if they are subject to both springs and air pressure.

5. Eating while driving:
Is a good way to maximize time.
Is encouraged on long trips.
Creates a distraction for the driver.
Is mandatory so cargo is not left unsupervised.

To reduce the chances of driving distracted, you should avoid eating, drinking, or smoking while driving. Anything that diverts attention from the task of driving is a distraction.

6. 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.

7. Off-ramps:
Are usually safest for trucks.
Can be dangerous for trucks.
Should not be used by trucks.

On- and off-ramps can be dangerous when driving a truck. Remember that posted speed limits for ramps may be safe for cars but too fast for trucks.

8. How should you brake if your vehicle loses its ABS?
Brake normally.
Pump the brake repeatedly.
Push the brake pedal down as hard as you can.
Avoid using the brakes.

An Anti-Lock Braking System (ABS) is in place as an addition to a braking system. It intervenes to prevent brakes from locking up during hard braking. If ABS is not working, the basic braking functions on a vehicle will still remain, so the driver can continue to drive and brake normally.

9. On a leaf spring:
Leaves should shift.
Leaves can be missing.
Leaves should not be broken.

When inspecting your vehicle's suspension, verify that leaf springs do not have missing or broken leaves. If at least one-fourth of the leaves in a leaf spring are missing, the vehicle will be put out-of-service until the defect is fixed.

10. When asked to complete a conventional parallel parking maneuver, you should:
Pass the parking space while backing, then pull forward into it.
Pull forward past the parking space, then back into it.
Pull forward into the parking space without passing it first.
Back into the parking space without passing it first.

You may be asked to complete a conventional parallel parking maneuver into a parking space that is to the right of your vehicle. You should drive past the parking space before backing into it while bringing the rear of your vehicle as close to the rear of the space as possible. Your vehicle should be completely within the boundaries of the space.

11. If a load is 10 feet long, it should be secured by a minimum of:
One tie-down.
Two tie-downs.
Three 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.

12. If you are driving so slowly that you could impede other vehicles, you should:
Stay in the left lane.
Drive with your emergency flashers activated.
Not use any lights.
Wave an arm out of your window.

If you must drive slowly, you should use your emergency flashers to warn other drivers. Be sure that the use of emergency flashers is permitted by local laws.

13. In a vehicle with dual parking control valves, once air pressure is lost and the spring brakes come on:
You will be unable to move the vehicle.
A separate air tank can be used to release the spring brakes for a short period of time.
You can use the spring brakes to continue driving normally.
The air tanks will automatically refill to a safe air pressure level.

In a vehicle with dual parking control valves, there is a separate air tank that can be used to temporarily release the spring brakes if they have been activated due to low air pressure. Pushing in the proper control will release the spring brakes for a short period of time, allowing the driver to move the vehicle in an emergency.

14. To change lanes, you should:
Move quickly.
Move slowly and smoothly.
Hold down your horn.

Always change lanes slowly and smoothly. If you did not see drivers who are already using the lane you wish to occupy, this will give them a chance to get out of your way or honk their horns to alert you. Always signal when changing lanes.

15. Convex mirrors:
Cannot be used on vehicles transporting hazardous materials.
Can replace flat mirrors.
Can be helpful to see a wider area.
Are illegal to be used in most states.

Many large vehicles have curved, convex mirrors. Convex mirrors allow drivers to see a wider area than flat mirrors. However, they also make objects seem smaller and farther away than they really are.

16. A driver can rely on front wheel braking to work:
On dry roadways only.
Under all conditions.
Under all conditions, except for snow.

Front wheel braking is effective under all road conditions. It is unlikely that you will experience a front wheel skid, even on ice.

17. When you need to change lanes:
Other vehicles will likely get out of your way.
You should change lanes slowly and smoothly.
You should wait to change lanes until you are in an intersection.

Lane changes should always be executed slowly and smoothly. This will result in safer handling of your vehicle while allowing time for other drivers to react to your movements.

18. A slack adjuster should move no more than ____ from where it is attached to the push rod.
Two inches
Five inches
One inch

Before a trip, you should check each slack adjuster after parking, setting wheel chocks, and disengaging the parking brake. Pull the slack adjusters to make sure that they do not move more than about one inch from where the push rod is attached. If they move more than one inch, they may be out of adjustment and will need to be fixed.

19. The most important reason to inspect your vehicle before a trip is:
To ensure safety.
To maximize gas mileage.
To wake up before the drive.
To fill up time.

The most important reason to inspect your vehicle before a trip is to ensure the safety of yourself and others on the road. Safety inspections before every trip are required by state and federal laws.

20. What happens when a vehicle hydroplanes?
The tires lose contact with the road.
The tires have extra traction.
The vehicle is easier to control.
The vehicle becomes heavier.

Hydroplaning occurs when a vehicle's tires lose contact with the road surface and instead glide along on a film of water above the surface of the road.

21. When the brake pedal is depressed, air brakes work:
After a short delay.
After about a minute.
Only if the green lever on the control panel is pushed down.

After the brake pedal is pushed down in a vehicle with air brakes, it takes a half-second or more for air to flow through the lines and make the brakes work. This contrasts with hydraulic brakes used in cars and light and medium trucks, which instantly begin working when the pedal is pushed.

22. A driver should always:
Stay in one lane.
Have an emergency plan.
Stay in the left lane.
Travel faster than the speed limit.

When driving, you should always scan the road for potential hazards. Formulate plans for how to deal with the hazards if they develop into emergencies.

23. During a static leakage test, the maximum leakage rate for a triple combination vehicle with air brakes is ____ in a minute.
3 psi
5 psi
7 psi
9 psi

When performing a static leakage test on a triple combination vehicle with air brakes, the leakage rate should be no more than 5 psi in one minute. If air leaks from the air brake system at a quicker rate, the vehicle should not be driven because something likely needs to be repaired.

24. When making tight maneuvers, it is important for a driver to:
Open the door for a better look.
Use their mirrors.
Flash their headlights.
Open their cargo door.

While regular mirror checks should always be part of your driving routine, you should make a particular point of checking the mirrors when changing lanes, turning, merging, or making tight maneuvers.

25. If you must drive in reverse, using driver's side backing:
Is always encouraged.
Is discouraged.
Is only recommended if it is raining.

If you must back up, it is safest to back toward the driver's side of the vehicle. This way, as the driver, you will have the best possible view of your path of travel.

26. If the coolant temperature gauge goes above the highest safe temperature, you should:
Continue to drive.
Pull over and figure out what's wrong.
Run the air conditioner.

If the coolant temperature gauge goes above the highest safe temperature, you should stop driving as soon as possible and try to figure out what is wrong. There could be an issue in your vehicle that could lead to engine failure and possibly a fire.

27. A pre-trip inspection:
Should never be completed the same way two times in a row.
Should always be completed in the same order.
Should only be done if it is sunny outside.
Should not be done if the driver thinks the vehicle is in good operating order.

A pre-trip inspection should be completed in the same way before every drive. Consistency will help you learn all of the proper steps and decrease the likelihood that you will forget to check something.

28. If being shipped on either a flatbed trailer or a trailer without sides, cargo must be:
Glued to the bed.
Strapped down.
Loose to allow it to shift when the vehicle turns.
Heavy enough that it won’t shift.

If being shipped on a flatbed trailer or on a trailer without sides, cargo must be securely tied down to keep it from shifting or falling off while the vehicle moves.

29. When transporting cargo, drivers must check the securement of the cargo every:
10 miles.
150 miles.
500 miles.
1,000 miles.

The securement of cargo must be checked before beginning a trip, within the first 50 miles of a trip, and then again every three hours or 150 miles.

30. When trying to avoid a hazard:
Stopping is always effective.
Swerving may be more effective than stopping.
You may change lanes without looking.
You should drive on the shoulder.

Stopping is not always the most effective response to a hazard. You can usually turn out of the path of a hazard more quickly than you can come to a complete stop. However, swerving is not without its hazards, as it may result in a rollover in a vehicle that is either top-heavy or pulling multiple trailers.

31. Without engine oil:
A vehicle will get better gas mileage.
An engine can be destroyed quickly.
The ABS won’t work properly.

It is essential that a vehicle's engine have adequate oil pressure. An engine can be destroyed rapidly if it is run without oil.

32. Retreaded tires:
May be used on the front axle of a school bus.
May be used on the rear axles of a school bus.
Cannot be used on a school bus.

Regrooved, recapped, or retreaded tires are not allowed to be used on the front wheels of a bus.

33. When checking tires, which of the following should not cause concern?
Too much air pressure
Tread of at least 4/32 of an inch on front tires
Radial and bias-ply tires used together

When checking the tires as part of a pre-trip inspection, make sure the tires have sufficient tread. There should be at least 4/32 of an inch of tread in every major groove of the front tires, and at least 2/32 of an inch of tread depth on the other tires. Tires should not be mismatched in size and radial and bias-ply tires should not be used together.

34. If approaching a vehicle with a distracted driver, you should:
Quickly pass the vehicle.
Maintain a safe distance from the vehicle.
Closely follow the vehicle.

If you see a distracted driver, give them plenty of space and maintain a safe following distance.

35. When backing, you should:
Move quickly to get out of the way of other drivers.
Try not to use your mirrors.
Start from any position.
Use a helper, if possible.

Backing a large CMV is always dangerous because you will not be able to see everything behind you. If you must back up, use a helper, if possible.

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