Over 95% pass rate when practice at DMV Practice Test

Texas CDL DMV Endorsement Double 1

Take 10 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.

Number of Test
Number of Question
Passing score
  • 0Correct
  • 0Incorrect
Not enough to pass :-(

Ouch! While you were on a roll there for a few questions, you didn’t pass this time. But I know this test, and I think you’ll pass next time. Really.

1. When turning quickly to avoid an object in the roadway, you should:
Apply your brakes as you steer.
Give yourself extra clearance by turning more than needed to miss the object.
Turn just enough to miss the object and avoid turning more.
Steer and accelerate at the same time.

When turning quickly to avoid an object, turn only as much as is necessary to clear it. Do not apply the brakes while turning.

2. Most drivers are the least alert:
In the morning.
In cold weather.
At night.
After work.

Fatigue and lack of alertness are major hazards when driving at night. Most people are the least alert at night, especially after midnight.

3. Before starting down a hill, be sure to:
Switch into a high gear.
Sound your horn.
Switch into a low gear.

Before starting down a hill, be sure to switch into a low gear. Gravity will increase your vehicle's speed as you travel downhill.

4. What can happen if a parking brake is used in very wet weather when temperatures are below freezing?
The brakes will squeak.
The brakes may freeze so the vehicle cannot move.
The brakes may suddenly release by themselves.
The brakes may explode.

If you use the parking brakes when the weather is very wet and the temperature is below freezing, the brakes may become frozen, preventing the vehicle from moving.

5. The service air line is attached to the:
Relay valves.
Supply line.
Emergency air line.
Steering wheel.

The service air line carries air and is controlled by either the foot brake or trailer hand brake. The service air line is attached to relay valves, which allow the trailer brakes to be applied quickly.

6. If you don't pull the dolly out from beneath the rear trailer before unlocking the pintle hook:
The tow bar may cause injury.
The landing gear may break.
The pintle hook may detach.
Nothing bad could happen.

Never unlock the pintle hook with the dolly still under the rear trailer. This could cause the dolly tow bar to fly up, possibly causing serious injury.

7. When a combination vehicle goes around a corner:
The turn should be made as tightly as possible.
The front and rear wheels move in different paths.
The rear wheels should run over the curb.
It is acceptable for street signs to be knocked over if they are too close to the road.

When a vehicle goes around a corner, the rear wheels follow a different path than the front wheels. This is called off-tracking. This effect is especially pronounced on vehicles with trailers.

8. Mirrors should be adjusted:
While moving.
When the trailers are straight.
When you are standing next to the vehicle.
By an assistant.

Mirrors should be checked prior to the beginning of a trip. On a vehicle with a trailer, mirror adjustment can only be checked accurately if the connected trailer is straight.

9. What does the trailer air supply control look like?
It is a square blue knob.
It is a triangular yellow knob.
It is an eight-sided red knob.
It is a circular orange knob.

On newer vehicles, the trailer air supply control is an eight-sided red knob. It's used to control the tractor protection valve.

10. For safety purposes, when should you turn off a retarder?
When the roadways are slippery
When you are carrying a passenger
When you are carrying a heavy load
When driving in heavy traffic

Retarders are mechanisms in some vehicles that help slow a vehicle and reduce the need for braking. However, using a retarder may cause wheels to skid when they have poor traction. Turn off retarders when traveling under wet, snowy, or icy conditions.

11. When preparing to drive in the winter, be sure to check:
The coolant level.
The defrosting and heating equipment.
The windshield wipers.
All of the above.

Before driving during the winter, make sure to check your defrosting and heating equipment, coolant and antifreeze levels, wipers and washers, tire tread, tire chains, lights, reflectors, and exhaust system. Clear ice and snow from all windows, mirrors, hand holds, steps, deck plates, and radiator shutters. Make sure the winterfront is not closed too tightly.

12. Bridges usually:
Freeze, but only once the temperature drops significantly below 32 degrees Fahrenheit.
Freeze after other road surfaces freeze.
Freeze before other road surfaces.
Have heaters to prevent them from freezing.

Bridges usually freeze before the rest of the road. You should be especially careful when crossing bridges if the temperature is near the freezing point.

13. 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.

14. Push in the trailer air supply control to:
Activate the emergency brakes.
Deactivate the air brakes.
Sound the horn.
Supply the trailer with air.

Push in the trailer air supply control to supply the trailer with air. Pull out the trailer air supply control to turn off the air supply and activate the emergency brakes.

15. Improper coupling is:
Not a problem.
Not easily detected.
Very dangerous.

It is essential that drivers of doubles and triples are able to correctly couple and uncouple their trailers. Improperly coupling and uncoupling trailers is extremely dangerous.

16. During a static leakage test, the maximum leakage rate for a single vehicle with air brakes is ____ in one minute.
1 psi
2 psi
3 psi
4 psi

When performing a static leakage test on a single vehicle with air brakes, the leakage rate should be no more than 2 psi in a 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.

17. All air tanks must include:
A drain valve.
A lock.
A trap door.
A warning sticker.

Air brake system tanks must contain drain valves. These valves are used to drain accumulated oil and water from the tanks and may be either manually or automatically operated.

18. When inspecting the trailers in double and triple combinations:
A driver should walk around the trailers.
A driver should remain in the cab.
A driver should use their mirrors.
A driver should board each trailer.

The trailers in double and triple combinations should be checked in walk-around inspections.

19. If a trailer's spring brakes do not release when you push the tractor air supply control, you should:
Check the air line connections.
Release the pintle hook.
Replace the spring brakes.
Drive normally without checking anything.

It is important that all of your vehicle's equipment is in proper working condition before you begin a trip. If a trailer's spring brakes do not release when you push in the tractor air supply control, you should make sure the air line connections are properly attached and sealed.

20. When you need to stop in an emergency, you should:
Lock the wheels and skid to a stop.
Stop in a way that keeps your vehicle in a straight line.
Stop in a way that turns your vehicle.
Expect your vehicle to slow down more quickly than usual.

If you need to make an emergency stop, you can use either the controlled braking method or the stab braking method. It's important to brake in a way that keeps your vehicle traveling in a straight line while still allowing you to turn, if necessary.

Your Progress
  • 0Incorrect (4 allowed to pass)
  • 0Correct