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Texas CDL DMV Knowledge Test Class A 2

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

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1. What is another name for front-end header boards?
Headache racks
Cargo stoppers
Head braces

Front-end header boards, also known as "headache racks," protect the driver from cargo moving in the event of a crash or emergency stop.

2. When driving through a work zone, you should:
Slow down.
Speed up.
Use a cell phone.
Steer with one hand to keep the other hand free.

In work zones, you should observe posted speed limits. Slow down if road or weather conditions are poor, and slow down even further if workers are near the roadway.

3. If a person commits two serious traffic violations within a three-year period, they will:
Lose their CDL for at least one week.
Lose their CDL for at least 30 days.
Lose their CDL for at least 60 days.
Lose their CDL for at least two years.

If, within a three-year period, a person commits two serious traffic violations involving a CMV, they will lose their CDL for at least 60 days.

4. 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.

5. 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.

6. How does doubling your speed from 20 mph to 40 mph affect your vehicle's braking distance?
It stays about the same.
It increases slightly.
It doubles.
It quadruples.

Increasing your vehicle's speed will increase your vehicle's striking power and braking distance. Doubling your vehicle's speed from 20 to 40 mph will multiply its braking distance by four.

7. If a tire fails, the driver should:
Keep one hand on the steering wheel and use their other hand to wave to other drivers.
Stomp on the brakes.
Not use the brakes.

If a tire fails, braking could cause a loss of control. Unless braking is necessary to avoid a hazard, you should stay off the brakes until your vehicle has slowed considerably. Only then should you brake very gently, pull off the road, and stop.

8. When driving with a load, the driver should:
Stop and check on the cargo within the first 50 miles of the trip.
Ask other drivers about the condition of their load.
Use the side mirrors only to check on the cargo.
Not check on the cargo if it was secured properly before starting the trip.

Cargo and its securing devices must be inspected before starting a trip. After beginning a trip, the driver should check the load and securing devices within the first 50 miles on the road, every three hours or 150 miles traveled, and after every break.

9. 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.

10. During exercises that are not the straight line backing exercise, you may exit your vehicle to check its position no more than:
One time.
Two times.
Three times.
Four times.

A driver is allowed to exit their vehicle to check its position during any basic control skills test exercise. This action is called a "look." During the straight line backing exercise, a driver may not exceed one look. During any other exercise, a driver may not exceed two looks.

11. When passing another vehicle, you should:
Make eye contact with the other driver.
Assume the other driver doesn’t see you.
Honk your horn.
Wave to other drivers.

It is always safest to assume that other drivers, bicyclists, and pedestrians don't see you. Be prepared for the possibility that they may suddenly move into your path. It may be safe to lightly tap your horn or flash your lights as you pass.

12. When checking the air and electrical lines during a vehicle inspection, all of the following should be true, except:
The air hoses are making a hissing noise.
The air hoses and electrical lines are not cut.
The air lines are not pinched.
The air lines are not dragging against tractor parts.

When examining the air and electrical lines as part of your vehicle inspection test, you must listen for leaks. Ensure that the air hoses and electrical lines are not cut, chafed, spliced, or worn. Make sure air and electrical lines are not tangled, pinched, or dragging against tractor parts.

13. If a truck's Anti-Lock Braking System (ABS) is not working:
The truck will not have any brakes.
The truck should be driven only at slow speeds.
The truck will still have brakes.
The truck will lack brakes on its left side.

If an ABS system fails, the vehicle will still have normal braking function. The driver should continue to drive and brake as they normally would.

14. What can change the height of a vehicle?
Number of windows

The added weight of a heavy load will make a vehicle sit lower than usual. A vehicle will often be taller when carrying a light load than when carrying a heavy load. If your vehicle fits under an overpass while carrying a full load, it is not guaranteed that it will fit under the same overpass if it is empty.

15. Poisonous fumes can enter the cab due to:
A defective exhaust system.
The wrong type of fuel being used.
A lack of oil in the engine.
Under-inflated tires.

Defects in an exhaust system are very dangerous because they can cause poisonous fumes to enter the cab or sleeper berth.

16. If you are being tailgated, you should:
Drive on the shoulder.
Pull off the roadway.
Drive faster.
Allow the vehicle to pass.

If someone is tailgating you, it is a good idea to open up the space ahead of your vehicle to make it easier for the driver to pass you. Increasing your speed is not a good idea because the driver may continue to tailgate you at the higher speed, only increasing the danger.

17. What is a wig wag?
A type of warning system
A tube used to move air from the compressor to the tanks
A noise made by air brakes when used
A part within the braking unit that allows air to move freely

A wig wag is a type of low air pressure warning device in an air brake system. It drops a mechanical arm into the driver's view when the air pressure in the tanks falls below 60 psi.

18. When exiting your vehicle, you must maintain ____ with the vehicle at all times.
One point of contact
Four points of contact
Three points of contact
Two points of contact

When exiting your vehicle during the basic vehicle control skills test, you must face the vehicle and maintain three points of contact at all times. If your testing vehicle is a bus, you must maintain contact with the handrail. Exiting the vehicle incorrectly may result in automatic failure of the basic control skills test.

19. 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.

20. During a static leakage test, the maximum leakage rate for a double combination vehicle is:
3 psi in one minute.
6 psi in one minute.
8 psi in one minute.
4 psi in one minute.

When performing a static leakage test on a double combination vehicle with air brakes, the leakage rate should be no more than 3 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.

21. Antifreeze helps to keep an engine functioning properly:
But only in cold weather.
But only in hot weather.
Regardless of the weather.
While minimizing the vehicle's fuel use.

It is always important to have enough water and antifreeze in a vehicle's cooling system. Despite the name, antifreeze is beneficial to an engine even in hot weather.

22. What happens if the air pressure in a system's air tanks falls below 60 psi?
A warning light will come on.
The vehicle will not shift out of gear.
The front lights will flash.
The vehicle should stop.

In an air brake system, a low pressure warning signal should activate if the pressure in the air tanks falls to a level below 60 psi. This signal may be in the form of a warning light or a wig wag.

23. When taking the on-road test, you will be evaluated on regular traffic checks. You should not:
Scan the road for pedestrians.
Check traffic regularly.
Avoid checking your mirrors near intersections.
Check your mirrors regularly.

While taking the on-road driving skills test, check for traffic and use your mirrors regularly, especially when encountering intersections. Scan and check for pedestrians in areas where they may be present.

24. When starting the engine as part of the pre-trip inspection, the driver should:
Listen for unusual noises.
Rev the engine.
Turn up the radio.
Turn on the heater.

Check your engine during the pre-trip inspection. After starting the engine, you should listen for unusual noises.

25. While driving, if you notice anything affecting safety or mechanics, you should:
Stay quiet and see if the problem goes away.
Make a written report that includes your concerns.
Try to fix the issue yourself.
Not use that part of the vehicle and hope others don't notice the problem.

At the end of each day of driving, you may be required to make a written report on the vehicle or vehicles driven. Be sure to make note of any issues that could affect the safety of the vehicle or that could lead to a mechanical breakdown.

26. During an applied leakage test, the maximum leakage rate for a single vehicle with air brakes is:
3 psi in one minute.
6 psi in one minute.
8 psi in one minute.
4 psi in one minute.

It is important to know the maximum air loss rate that is safe for your specific vehicle. A single vehicle with air brakes should have a leakage rate no higher than 3 psi in a minute during an applied leakage test.

27. If you experience a loss of hydraulic pressure, you should do all of the following, except:
Pump the brakes.
Use the parking brake.

If you experience a loss of hydraulic pressure in your brakes, you should downshift, pump the brakes, and use the parking brake. Seek an escape route, such as an escape ramp, open field, or side street.

28. An open automobile window in cold weather may indicate that the driver is:
Driving impaired.
Inappropriately dressed.
Using the heat inside their vehicle.
Enjoying the fresh air.

It is important to observe other drivers' behaviors and identify clues that indicate when person could be driving impaired. Drivers who have had too much to drink, are sleepy, are on drugs, or are ill can present hazards to other drivers. A person driving with their window open in cold weather may be impaired.

29. When it is difficult for others to see your vehicle, such as at dawn or dusk, you can help other drivers by:
Keeping your lights off.
Turning your lights on.
Driving on the shoulder.
Waving an arm out the window.

At times when visibility is low, you should turn your headlights on to the low beam setting. If you are having a difficult time seeing others, they are probably having a difficult time seeing you.

30. Which of the following is not an activity that causes a distraction?
Adjusting the radio
Adjusting the CD player
Checking your mirrors

Anything that takes your attention away from driving can be a dangerous distraction. This includes eating, drinking, smoking, or adjusting the vehicle's audio and climate controls.

31. Most CDL holders have ____ licenses.

Most CDL holders who drive CMVs in interstate commerce are non-excepted interstate commerce drivers.

32. A truck may need to be under the legal maximum weight limit when being driven:
On a flat road.
On a mountainous road.
In heavy traffic.
At night.

Under some driving conditions, it may not be safe to operate a vehicle at its full legal maximum weight. Keep this in mind when driving in poor weather or on mountainous roadways.

33. A vehicle stopped at a green light may indicate that the driver:
Is impaired.
Is colorblind.
Does not know the rules of the road.
Is very patient.

It is important to observe other drivers' actions and identify clues that a person could be driving impaired. Drivers who have had too much to drink, are sleepy, are on drugs, or are ill can present hazards to other drivers. One sign that a driver may be impaired is that they stop in inappropriate places, such as at green traffic lights.

34. 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.

35. Which of the following does not require a CDL?
Operating a truck with a GVWR of 26,001 pounds or more
Operating a vehicle designed to transport 16 or more passengers, including the driver
Any size vehicle which requires hazardous materials placards
Any size vehicle with advertising

With some exemptions, a CDL is required to operate a vehicle or combination with a gross vehicle weight rating (GVWR) of 26,001 pounds or more; that is designed to transport 16 or more people, including the driver; or that is used to transport hazardous materials that require placards.

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