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Texas CDL DMV Knowledge Test Class B 2

Take 4 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. If federal inspectors judge your vehicle to be unsafe, they can:
Bring you to a garage to have your vehicle fixed.
Formerly request that you have your vehicle's problems fixed.
Call a mechanic.
Pull the vehicle out-of-service until it is fixed.

If a federal or state inspector judges a CMV to be unsafe, they may put it out-of-service until it is fixed.

2. When testing a parking brake, the vehicle should:
Not be running.
Be placed in a low gear while the driver attempts to pull forward.
Be inspected by a professional mechanic.
Be driven while the parking brake is applied.

To test a parking brake, you should fasten your safety belt, set the parking brake for the power unit, release the trailer parking brake (if applicable), place the vehicle in low gear, and attempt to pull forward against the parking brake. If the parking brake does not hold while you are attempting to pull forward against it, the brake is faulty and must be fixed.

3. 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.

4. Anti-Lock Braking Systems (ABS):
Reduce normal braking capacity.
Are equipped in addition to other braking systems and do not reduce normal braking power.
Are not effective on larger vehicles.
Are illegal in some states.

ABS is equipped in addition to a vehicle's normal braking system and it neither increases nor decreases the vehicle's braking capability. ABS activates during hard applications of the brake pedal in order to prevent wheels from locking up.

5. If your truck or trailer catches fire, you should:
Park in a congested area near trees.
Pull into a service station.
Park near other vehicles.
Park in an open area.

If there is a fire in your vehicle, the first thing you need to do is leave the road and stop. Park in an open area away from anything that could catch fire, such as plants or other vehicles. Do not pull into a service station.

6. 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.

7. To correct a drive-wheel braking skid, a driver should do all of the following, except:
Remove your foot from the brake pedal.
Turn quickly in the direction of the skid.
Countersteer after the vehicle is back on course.

To correct a drive-wheel braking skid, you should first remove your foot from the brake pedal to allow the locked wheels to begin rolling again. Quickly steer in the direction you want to go, then countersteer to prevent your vehicle from skidding in the opposite direction.

8. During a vehicle inspection, ensure that the landing gear is:
Fully raised.
More worn on the passenger's side than on the driver's side.
Well lit.

When inspecting a trailer during a vehicle inspection test, ensure that its landing gear has no missing parts and that it is fully raised. The crank handle should be secure and the support frame should not be damaged.

9. When inspecting a power steering-equipped vehicle, you should be sure that:
The fluid is at the proper level.
The hoses are connected to the battery.
The hoses do not contain any fluid.
Only small leaks are present.

When inspecting a vehicle equipped with power steering, check the hoses, pumps, and fluid level. Be sure to check for and repair leaks before operating the vehicle.

10. Friction inside a brake drum is caused when the brake shoes and linings:
Push against each other.
Separate from the axle.
Push against the inside of the drum.
Create excess heat.

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.

11. How much water is needed on a road surface for a vehicle to hydroplane?
Usually several inches
A good amount, such as a large puddle
A small amount
No water

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 much water on the road for this to occur.

12. If braking at a speed of 55 mph while driving on dry pavement, the brake lag can add ____ to your vehicle's total stopping distance.
32 feet
15 feet
50 feet
10 feet

The total stopping distance for vehicles equipped with air brakes is made up of four factors: perception distance, reaction distance, brake lag distance, and braking distance. When braking at a speed of 55 mph while driving on dry pavement, the brake lag can add around 32 feet to a vehicle's total stopping distance.

13. Why are roads especially slippery right after it begins to rain?
The water mixes with oil and grease on the road.
Roads are naturally slippery.
Gravel often gets washed to the middle of the lane.
Tires are not usually designed to drive in rain.

In rainy weather, roads are often at their most slippery when the rain first begins to fall. Fresh rainwater mixes with oil and grease on the road to form a slick film. As the rain continues, this mixture will eventually wash away.

14. How should you check your hydraulic brakes?
Pump the brakes three times, then apply firm pressure to the brake pedal for five seconds. The brake pedal should not move.
Pump the brakes three times, then apply firm pressure to the brake pedal for five seconds. The brake pedal should slowly move toward the floor.
Pump the brakes three times, then apply firm pressure to the brake pedal for five seconds. The brake pedal should slowly rise.
Pump the brakes three times, then apply firm pressure to the brake pedal for five seconds. The brake pedal should be easy to push to the floor.

To test hydraulic brakes, you should pump the brake pedal three times, then apply firm pressure to the brake pedal and hold for five seconds. The pedal should not move. If it does, there may be a leak.

15. When you need to brake, how can you warn drivers behind you?
Tap on the brakes a couple of times.
Stick your arm out the window.
Swerve within your lane.
Change lanes.

To warn drivers behind you that you are about to slow down, it may be a good idea to first lightly tap your brake pedal a few times to make the brake lights flash.

16. 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.

17. Loading cargo onto a vehicle:
Must be done by the driver.
May be done by a person other than the driver, and they become responsible for the safety of the cargo.
May be done by a person other than the driver, but the driver is responsible for the safety of the cargo.
Must be done by a professional loader.

Even if someone else loads cargo onto a vehicle, the driver is responsible for properly inspecting the cargo, ensuring that it is properly loaded and secured, and ensuring that it does not obscure their view or access to emergency equipment.

18. Don't spend too much time looking at a single mirror because:
Conditions can change quickly.
Looking at mirrors can make you drowsy.
It can result in you driving a long distance without looking at the road.
The mirror may not provide an accurate view of the road.

Check you mirrors frequently while driving, but check them quickly. Staring at one mirror for too long can cause you to drive a long distance without knowing what is ahead.

19. What kind of force must emergency brakes use?
Air pressure

Because air pressure can eventually leak away, the emergency brakes in an air brake system must be held on by mechanical force.

20. If a vehicle has air brakes, the air compressor drive belt should be checked before each drive. The belt should be:
Loosely attached.

When inspecting an air brake system with a belt-driven air compressor, it is important to check the condition and tightness of the belt.

21. If hydraulic brakes fail, a driver can reduce their speed by:
Shifting into a higher gear.
Shifting into a lower gear.
Finding a hill.
Letting the truck run out of gas.

If your hydraulic bakes fail, shifting into a lower gear can help slow your vehicle down.

22. When driving, your mirrors should:
Not be used, as they are distracting.
Not be used unless there is traffic.
Be checked regularly.
Be checked regularly, but only if it is cloudy.

It is important for you to be aware of your surroundings at all times. To do this, regularly check your mirrors.

23. Which of the following surfaces provides the least amount of traction?
Ice that is dry
Ice that is wet
Wet pavement
Dry pavement

Be especially cautious when driving on ice that has begun to melt. Ice that is wet is much more slippery than ice that is dry.

24. 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.

25. Improperly loaded cargo can:
Look bad to others on the road.
Injure the driver during a quick stop.
Make it easier to stop.
Aid in safety.

Cargo must be properly loaded and secured to prevent it from falling or shifting dangerously. During a quick stop, improperly loaded cargo could injure or even kill the driver.

26. Driving at night is:
Safer than driving during the day.
Just as safe as driving during the day.
More dangerous than driving during the day.

Driving at night is more dangerous than driving during the day. It is more difficult for drivers to see hazards, the glare of headlights can affect drivers' vision, and there are more fatigued and impaired drivers on the road.

27. Which of the following is not a good way to reduce crashes when turning right?
Turn slowly.
Keep the tail end close to the curb.
Keep an eye on oncoming traffic.
Allow open space on your right side.

When making a right turn, avoid turning too wide to the left. If you must swing into another lane to complete the turn, you should keep the rear of your vehicle close to the curb. Leaving space to the right of your vehicle while turning right may indicate to other drivers that you are turning left, so they may attempt to pass you on your right.

28. Which type of brakes do most heavy-duty vehicles have?
Air brakes
Solid brakes
Liquid brakes
Gravity brakes

For safety, most heavy-duty vehicles are equipped with dual air brake systems.

29. Once stopped as a part of the stop/start maneuver, you should:
Use the four-way flashers.
Not use the four-way flashers because it is just a test, not an emergency.
Leave the vehicle in first gear.
Park in front of a fire hydrant.

Once you have stopped as a part of the stop/start maneuver during the on-road driving skills test, you must activate your four-way flashers and shift into neutral or park. You must not block any driveways, intersections, fire hydrants, or signs.

30. When steering to avoid a crash, you should:
Only use one hand to steer.
Keep both hands on the steering wheel.
Not use your mirrors to check other lanes.
Speed up as you get nearer to the hazard.

When turning quickly to avoid colliding with a hazard in the roadway, you should always keep both hands on the steering wheel. You must have a firm grip on the wheel to be able to turn quickly.

31. When carrying a sealed load, the driver:
Should inspect the contents.
Should ensure the weight of the cargo does not violate weight limits.
Must go through each container.
Should unseal the load to ensure safety.

While a driver cannot inspect sealed loads, they can still ensure that the load does not exceed gross weight and axle weight limits.

32. The brake pedal is part of which braking system?
The service brake system
The parking brake system
The emergency brake system
The auxiliary brake system

The service brake system applies and releases the brakes when a driver presses the brake pedal while driving normally.

33. What is black ice?
A thick layer of ice on the road
A thin layer of ice on the road
Ice that is black from debris on the road
Ice that is easily seen

Black ice is a thin layer of ice that is clear enough for the road surface to be seen through it. A road covered in black ice may look like it is merely wet.

34. A burning tire should be:
Cooled with water.
Fanned with a blanket.
Cut up with an axe.
Covered with a tarp.

A burning tire should be cooled with water. A driver may need to use large quantities of water to properly cool the tire.

35. If unsure if a road is becoming icy, a driver can:
Open the window and check the front of the mirror for ice.
Try to look at the road closely.
Look at a weather forecast.

If you think the road surface may be becoming icy, you can check for ice on your vehicle by opening the window and feeling the front of the side mirror, mirror support, or antenna. If ice has formed on any of these items, the road is likely becoming icy as well.

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