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Texas CDL DMV Knowledge Test Class B 1

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1. 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.

2. 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.

3. If driving a truck that requires a CDL for operation:
You do not need to wear a seat belt.
You are required to wear a seat belt, but only if transporting more than 500 pounds of cargo.
You are always required to wear a seat belt.
You are only required to wear a seat belt when driving a tank trailer.

For safety, you must wear your seat belt at all times while operating a CMV.

4. When driving in heavy traffic, you should:
Use hands-free cellular devices.
Use your cell phone for texting instead of calling.
Not use your cell phone.
Turn up the ringer on your cell phone.

Areas with heavy traffic, road construction, large numbers of pedestrians, or severe weather demand extra attention from a driver. The driver should avoid all possible distractions while in such areas, including cell phone use.

5. What is the purpose of a vehicle inspection report?
It tells the motor carrier about problems that may need to be fixed.
It ensures that the vehicle is inspected regularly.
It keeps drivers accountable for inspecting their vehicles.
It provides a plan for the next five trips.

A vehicle inspection report allows a driver to inform the motor carrier of issues that could affect the safe operation of a vehicle. If required, the driver should fill out a vehicle inspection report after every day of driving. They should make note of any issues that could affect the safety of the vehicle or that could lead to a mechanical breakdown.

6. When checking tire condition during the vehicle inspection, you should:
Ensure that the insides of the tires are more worn than the outsides of the tires.
Ensure that the outsides of the tires are more worn than the insides of the tires.
Ensure that the middles of the tires are more worn than the outsides of the tires.
Ensure that the tires have even wear.

When examining your tires during the vehicle inspection test, you should ensure that treads are evenly worn.

7. During a basic vehicle control skills test, what is considered an encroachment?
The vehicle crossing over an exercise boundary line.
A driver executing a single pull-up.
A driver placing the vehicle in neutral and applying the parking brake.
The vehicle stalling while the driver shifts gears.

An encroachment during the basic vehicle control skills test is when an exercise boundary line is touched or crossed by any portion of the applicant's vehicle. Every encroachment will be counted as an error.

8. Failing to drain the tanks in an air brake system can result in:
Water freezing and causing brake failure.
Squishy brakes.
Too much air collecting.
Too much fuel being carried.

In an air brake system, the air storage tanks must be drained to remove accumulated water and compressor oil. Failing to do this can cause damage. For example, water that has built up in the system could freeze in cold weather and cause brake failure.

9. Federal and state laws require:
Drivers to regularly inspect their vehicles.
Drivers to inspect their vehicles, but only if they believe there may be a problem.
Drivers to inspect their vehicles if planning to travel out-of-state.
Drivers to inspect their vehicles, but only if they will be transporting hazardous materials.

Commercial drivers are required by federal and state laws to inspect their vehicles before every trip. Regular inspections can help drivers identify issues before they become dangerous and costly.

10. During a basic vehicle control skills test, what is considered an encroachment?
A driver placing the vehicle in neutral and applying the parking brake.
The vehicle touching an exercise boundary line.
A driver properly completing an exercise in the skills test.
An applicant trying to bribe the examiner.

An encroachment during the basic vehicle control skills test is when an exercise boundary line is touched or crossed by any portion of the applicant's vehicle. Every encroachment will be counted as an error.

11. When taking the on-road driving skills test, you will be evaluated on your gear usage. You should not:
Avoid grinding or clashing gears.
Select a gear that does not rev the engine.
Forget to shift through an intersection.
Shift while taking a turn.

During the on-road driving skills test, you will be evaluated on your gear usage. Select a gear that does not rev or lug the engine; avoid grinding and clashing gears; and avoid shifting through turns or intersections.

12. When approaching your vehicle, you should ensure that:
The vehicle is shiner than others.
The vehicle is not parked too closely to other vehicles.
There are not puddles under the vehicle that indicate a leak.
The vehicle is parked properly.

When approaching your vehicle before an inspection, make note of its general condition and ensure that it is not damaged or leaning. Look under the vehicle for fresh leaks. Check around the vehicle for hazards to movement, such as people, other vehicles, or low-hanging wires or tree limbs.

13. Which of the following is not an example of a driver who might be a hazard?
A driver operating a vehicle without first scraping ice off the windshield
The operator of a rental truck
The driver of a station wagon with items covering the back windows
A person operating a pick-up truck

Drivers with blocked vision may pose hazards to others on the road. Examples of such drivers include those who haven't scraped ice off of their windshields; those driving vehicles loaded with large items blocking the windows; and those who are driving rental trucks without being used to the limited rear visibility of a truck.

14. When starting a vehicle, the coolant temperature gauge should:
Not change from its original position.
Gradually rise to the normal operating range.
Jump quickly to the normal operating range.
Flash until it reaches the normal operating range.

Keep an eye on the gauges after starting the engine. The coolant temperature gauge should begin a gradual rise to the normal operating range.

15. What color is the low air pressure warning light?

A low air pressure warning signal is required in vehicles with air brakes. The warning light is usually red and may be accompanied by a buzzer.

16. 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.

17. ____ is a thin layer of ice that forms on road surfaces.
White ice
Black ice
Green ice
Blue ice

Black ice is a layer of ice that is thin and clear enough for the road to be visible through it. This makes the road look as if it is merely wet.

18. Dry bulk tanks require special care because:
They have low centers of gravity.
They have high centers of gravity.
Loads are usually stable.
They are usually overloaded.

Driving with a dry bulk tank requires special care, both because dry bulk tanks have high centers of gravity and because their loads often shift in transit. Be especially careful when taking turns and curves while operating such a vehicle.

19. 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.

20. Which of the following is an example of a serious traffic violation?
Driving at a speed faster than 15 mph above the posted speed limit
Traffic offenses committed in a CMV in connection with personal injury traffic accidents
Not coming to a complete stop at a stop sign
Traveling in a group of more than five CMVs

Serious traffic violations include excessive speeding (15 mph or more above the posted limit); reckless driving; improper or erratic lane changes; following a vehicle too closely; traffic offenses committed in a CMV in connection with fatal traffic accidents; driving a CMV without obtaining a CDL or having a CDL in the your possession; and driving a CMV without the proper CDL class and/or endorsements.

21. During the skills test, if making a turn that requires a stop, you should:
Skid to a stop.
Stop after the stop line to get a better view.
Allow your vehicle to roll.
Keep the front wheels aimed straight ahead.

If you must come to a stop before making a turn during the driving skills test, you should come to a smooth stop behind any stop line, crosswalk, or stop sign. Keep your front wheels aimed straight ahead and do not let your vehicle roll. If stopping behind another vehicle, stop where you are still able to see the rear tires of the vehicle ahead of you.

22. If feeling tired and frequently yawning, you should:
Press on and continue driving.
Get some coffee.
Drive faster.
Pull over and take a nap.

Frequent yawning is a warning sign of fatigue. If you become tired while driving, the only safe response is to stop and get some sleep. You cannot rely on artificial stimulants, like caffeine, to keep you alert because they will eventually wear off and leave you more tired than you originally were.

23. When driving on the expressway during the skills test, you should:
Switch lanes frequently.
Use your mirrors to check traffic as needed.
Drive on the left side of the lane.
Drive above the posted speed limit.

During the on-road driving skills test, you may be asked to drive on an expressway. Make sure you maintain proper lane positioning, vehicle spacing, and vehicle speed. Continue to thoroughly check traffic in all directions while on the expressway.

24. 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.

25. 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.

26. If convicted of violating two or more texting laws at the state level, your CDL may be:
Unaffected if the violations occurred in another state.
Unaffected if you are a fast texter.
Disqualified for a month.
Disqualified for six months.

If you are convicted of violating any texting law two or more times, your CDL will be disqualified. Disqualification will be 60 days for a second offense within three years, and 120 days for third or subsequent offenses within three years.

27. Before a vehicle with dual air brakes is driven, pressure of at least ____ should be built up in both braking systems.
10 psi
25 psi
50 psi
100 psi

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

28. Hanging meat as a cargo:
Creates a safe driving situation.
Creates an unstable load.
Should not be done.
Creates a low center of gravity.

Hanging meat can be an unstable load in a vehicle. The truck may become top-heavy and steering may be inhibited by the swinging meat. Drivers carrying such loads should use particular caution when traveling around sharp curves, such as highway entrance and exit ramps.

29. If driving in a foggy area, you should not:
Decrease your speed.
Increase your speed.
Use your low beam headlights.
Turn on your four-way flashers.

It is safest not to drive in foggy areas. However, if you must drive through fog, you should slow down, use your low beam headlights and fog lights, and turn on your four-way flashers.

30. When using road speed to know when to switch gears, you should:
Learn what speeds each gear is good for and shift up when necessary.
Watch other vehicles and try to keep pace.
Watch other trucks and shift when they shift.
Use the speed limit as a guide.

There are two indicators that determine when you need to shift into a higher gear. One indicator is the engine speed (rpm). You should read your vehicle's manual to learn its rpm range and shift up when you reach the top of that range. The other indicator is road speed (mph). You should learn which speeds each gear can accommodate, then keep an eye on the speedometer and shift up as needed.

31. In very hot weather, tires should be checked regularly because:
They may melt.
Air pressure may increase with the temperature.
The tread wears down extra quickly.
The lug nuts may loosen.

Air expands as it gets warmer, so the air pressure in your tires could reach dangerously high levels while being used in very hot weather. If this happens, stop and let your tires cool. Do not let air out of the tires, as this could result in the pressure dropping to an unsafe level once the tires cool down.

32. How many air storage tanks are used in an air brake system?
Two tanks
Four tanks
Six tanks
The number varies.

Air storage tanks are used to hold compressed air. The number and size of air tanks in an air brake system varies among vehicles.

33. 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.

34. Hydroplaning usually occurs:
When tires are properly inflated.
At speeds under 15 mph.
In areas where water collects on the road.
During the evening.

In places where water collects on the road, it is possible for a vehicle to hydroplane. Low tire pressure or worn tire tread makes this more likely to happen. If there is enough water on a road surface, hydroplaning can occur at speeds as low as 30 mph.

35. You may be denied a HazMat endorsement if:
You are a lawful resident of the United States.
You have renounced your United States citizenship.
You have only been convicted of misdemeanors.
You do not suffer from a mental illness.

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

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